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Human olfaction: more efficient, 3D
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DD'eDeN aka note/nickname/alas_my_loves
Jan 11, 2019, 12:38:24 PM1/11/19
to
Primum Sapienti
Jun 23, 2020, 10:25:57 PM6/23/20
to
DD'eDeN aka note/nickname/alas_my_loves wrote:
> https://www.sciencedaily.com/releases/2019/01/190109142702.htm
>
"The human nose can distinguish one trillion different scents -- an
extraordinary feat that requires 10 million specialized nerve cells, or
neurons, in the nose, and a family of more than 400 dedicated genes. But
precisely how these genes and neurons work in concert to pick out a
particular scent has long puzzled scientists. This is in large part
because the gene activity inside each neuron -- where each of these 10
million neurons only chooses to activate one of these hundreds of
dedicated genes -- seemed far too simple to account for the sheer number
of scents that the nose must parse."
> https://www.sciencedaily.com/releases/2019/01/190109142702.htm
>
"The human nose can distinguish one trillion different scents -- an
extraordinary feat that requires 10 million specialized nerve cells, or
neurons, in the nose, and a family of more than 400 dedicated genes. But
precisely how these genes and neurons work in concert to pick out a
particular scent has long puzzled scientists. This is in large part
because the gene activity inside each neuron -- where each of these 10
million neurons only chooses to activate one of these hundreds of
dedicated genes -- seemed far too simple to account for the sheer number
of scents that the nose must parse."
Primum Sapienti
Mar 12, 2021, 11:58:30 PM3/12/21
to
JTEM is lucky in love AND money
Mar 13, 2021, 2:24:50 AM3/13/21
to
Primum Sapienti wrote:
> "The human nose can distinguish one trillion different scents
You can't.
> "The human nose can distinguish one trillion different scents
This is stupid.
The brain is as important if not more so than the nose. Humans
just plain don't have an enormous chunk of our brains going to
process smells.
What the study is doing really well is demonstrating how, in nature,
in our evolutionary history it very often isn't about what we've got
but how we use it. We're not so much crappier at smelling things
because our noses fall short, it's because our brain development
favored other things.
A true study would be beyond cruelty: Raising humans from birth
within an environment where they are forced to rely on smell, seeing
if that results in a more developed olfactory bulb...
Pure cruelty, especially when it isn't even very interesting as a topic.
-- --
https://jtem.tumblr.com/post/645502615512399872
littor...@gmail.com
Mar 13, 2021, 4:11:15 AM3/13/21
to
> > https://www.sciencedaily.com/releases/2019/01/190109142702.htm
> "The human nose can distinguish one trillion different scents -
:-DDD
Primum Sapienti
Mar 22, 2021, 12:24:36 AM3/22/21
to
littor...@gmail.com
Mar 25, 2021, 5:49:37 PM3/25/21
to
Op maandag 22 maart 2021 om 05:24:36 UTC+1 schreef Primum Sapienti:
Not well:
OI, BIG NOSE !
New Scientist 2782 p 69 Lastword 16 October 2010
Why do humans evolve external noses that don’t seem to serve any useful purpose – our smelling sensors are inside the head. Our nose is vulnerable to damage, and the majority of primates and other mammals manage with relatively flat faces. Traditional explanations are that the nose protects against dry air, hot air, cold air, dusty air, whatever air, but most savannah mammals have no external noses, and polar animals such as arctic foxes or hares tend to evolve shorter extremities including flatter noses (Allen’s Rule), not larger as the Neanderthal protruding nose.
The answer isn’t so difficult if we simply consider humans like other mammals.
An external nose is seen in elephant seals, hooded seals, tapirs, elephants, swine and, among primates, in the mangrove-dwelling proboscis monkeys. Various, often mutually compatible functions, have been proposed, such as sexual display (in male hooded and elephant seals or proboscis monkeys), manipulation of food (in elephants, tapirs and swine), a snorkel (elephants, proboscis monkeys) and as a nose-closing aid during diving (in most of these animals). These mammals spend a lot of time at the margins of land and water. Possible functions of an external nose in creatures evolving into aquatic ones are obvious and match those listed above in many cases. They can initially act as a nose closure, a snorkel, to keep water out, to dig in wet soil for food, and so on. Afterwards, these external noses can also become co-opted for other functions, such as sexual display (visual as well as auditory) in hooded and elephant seals and proboscis monkeys.
But what does this have to do with human evolution?
The earliest known Homo fossils outside Africa – such as those at Mojokerto in Java and Dmanisi in Georgia – are about 1.8 million years old. The easiest way for them to have spread to other continents, and to islands such as Java, is along the coasts, and from there inland along rivers. During the glacial periods of the Pleistocene – the ice age cycles that ran from about 1.8 million to 12,000 years ago – most coasts were about 100 metres below the present-day sea level, so we don’t know whether or when Homo populations lived there. But coasts and riversides are full of shellfish and other foods that are easily collected and digested by smart, handy and tool-using “apes”, and are rich in potential brain-boosting nutrients such as docosahexaenoic acid (DHA).
If Pleistocene Homo spread along the coasts, beachcombing, wading and diving for seafoods as Polynesian islanders still do, this could explain why Homo erectus evolved larger brains (aided by DHA) and larger noses (because of their part-time diving). This littoral intermezzo could help to explain not only why we like to have our holidays at tropical beaches, eating shrimps and coconuts, but also why we became fat and furless bipeds with long legs, large brains and big noses.
OI, BIG NOSE !
New Scientist 2782 p 69 Lastword 16 October 2010
Why do humans evolve external noses that don’t seem to serve any useful purpose – our smelling sensors are inside the head. Our nose is vulnerable to damage, and the majority of primates and other mammals manage with relatively flat faces. Traditional explanations are that the nose protects against dry air, hot air, cold air, dusty air, whatever air, but most savannah mammals have no external noses, and polar animals such as arctic foxes or hares tend to evolve shorter extremities including flatter noses (Allen’s Rule), not larger as the Neanderthal protruding nose.
The answer isn’t so difficult if we simply consider humans like other mammals.
An external nose is seen in elephant seals, hooded seals, tapirs, elephants, swine and, among primates, in the mangrove-dwelling proboscis monkeys. Various, often mutually compatible functions, have been proposed, such as sexual display (in male hooded and elephant seals or proboscis monkeys), manipulation of food (in elephants, tapirs and swine), a snorkel (elephants, proboscis monkeys) and as a nose-closing aid during diving (in most of these animals). These mammals spend a lot of time at the margins of land and water. Possible functions of an external nose in creatures evolving into aquatic ones are obvious and match those listed above in many cases. They can initially act as a nose closure, a snorkel, to keep water out, to dig in wet soil for food, and so on. Afterwards, these external noses can also become co-opted for other functions, such as sexual display (visual as well as auditory) in hooded and elephant seals and proboscis monkeys.
But what does this have to do with human evolution?
The earliest known Homo fossils outside Africa – such as those at Mojokerto in Java and Dmanisi in Georgia – are about 1.8 million years old. The easiest way for them to have spread to other continents, and to islands such as Java, is along the coasts, and from there inland along rivers. During the glacial periods of the Pleistocene – the ice age cycles that ran from about 1.8 million to 12,000 years ago – most coasts were about 100 metres below the present-day sea level, so we don’t know whether or when Homo populations lived there. But coasts and riversides are full of shellfish and other foods that are easily collected and digested by smart, handy and tool-using “apes”, and are rich in potential brain-boosting nutrients such as docosahexaenoic acid (DHA).
If Pleistocene Homo spread along the coasts, beachcombing, wading and diving for seafoods as Polynesian islanders still do, this could explain why Homo erectus evolved larger brains (aided by DHA) and larger noses (because of their part-time diving). This littoral intermezzo could help to explain not only why we like to have our holidays at tropical beaches, eating shrimps and coconuts, but also why we became fat and furless bipeds with long legs, large brains and big noses.
Primum Sapienti
Mar 28, 2021, 12:23:23 AM3/28/21
to
littor...@gmail.com wrote:
> Op maandag 22 maart 2021 om 05:24:36 UTC+1 schreef Primum Sapienti:
>
>>>>> https://www.sciencedaily.com/releases/2019/01/190109142702.htm
>
>>>> "The human nose can distinguish one trillion different scents -
>
>>> Imbecilic kudu runners believe human have better olfaction than dogs... :-DDD
>
>> How well do snorkel noses smell?
>
> Not well:
https://advances.sciencemag.org/content/4/2/eaaq0250.full
> Op maandag 22 maart 2021 om 05:24:36 UTC+1 schreef Primum Sapienti:
>
>>>>> https://www.sciencedaily.com/releases/2019/01/190109142702.htm
>
>>>> "The human nose can distinguish one trillion different scents -
>
>>> Imbecilic kudu runners believe human have better olfaction than dogs... :-DDD
>
>> How well do snorkel noses smell?
>
> Not well:
Nasalization by Nasalis larvatus: Larger noses audiovisually advertise
conspecifics in proboscis monkeys
Science Advances 21 Feb 2018:
Abstract
Male proboscis monkeys have uniquely enlarged noses that are prominent
adornments, which may have evolved through their sexually competitive
harem group social system. Nevertheless, the ecological roles of the
signals encoded by enlarged noses remain unclear. We found significant
correlations among nose, body, and testis sizes and a clear link between
nose size and number of harem females. Therefore, there is evidence
supporting both male-male competition and female choice as causal factors
in the evolution of enlarged male noses. We also observed that nasal
enlargement systematically modifies the resonance properties of male
vocalizations, which probably encode male quality. Our results indicate
that the audiovisual contributions of enlarged male noses serve as
advertisements to females in their mate selection. This is the first
primate research to evaluate the evolutionary processes involved in
linking morphology, acoustics, and socioecology with unique masculine
characteristics.
littor...@gmail.com
Mar 28, 2021, 9:43:37 AM3/28/21
to
Op zondag 28 maart 2021 om 06:23:23 UTC+2 schreef Primum Sapienti:
> https://advances.sciencemag.org/content/4/2/eaaq0250.full
Nasalization by Nasalis larvatus:
Larger noses audiovisually advertise conspecifics in proboscis monkeys
Science Advances 21 Feb 2018
Therefore, there is evidence supporting both male-male competition & female choice as causal factors in the evolution of enlarged male noses.
This is the first primate research to evaluate the evolutionary processes involved in linking morphology, acoustics & socio-ecology with unique masculine characteristics.
Thanks for this, yes, Nas.larvatus males are allopatric: they swim to other mangroves to establish a harem, no wonder males having a big nose is important.
This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
> https://advances.sciencemag.org/content/4/2/eaaq0250.full
Nasalization by Nasalis larvatus:
Larger noses audiovisually advertise conspecifics in proboscis monkeys
Science Advances 21 Feb 2018
Male proboscis monkeys have uniquely enlarged noses that are prominent adornments, which may have evolved through their sexually competitive harem group social system.
Nevertheless, the ecological roles of the signals encoded by enlarged noses remain unclear.
We found significant correlations among nose, body & testis sizes & a clear link between nose size & number of harem females.
Nevertheless, the ecological roles of the signals encoded by enlarged noses remain unclear.
Therefore, there is evidence supporting both male-male competition & female choice as causal factors in the evolution of enlarged male noses.
We also observed that nasal enlargement systematically modifies the resonance properties of male vocalizations, which probably encode male quality.
Our results indicate that the audio-visual contributions of enlarged male noses serve as advertisements to females in their mate selection.
This is the first primate research to evaluate the evolutionary processes involved in linking morphology, acoustics & socio-ecology with unique masculine characteristics.
Thanks for this, yes, Nas.larvatus males are allopatric: they swim to other mangroves to establish a harem, no wonder males having a big nose is important.
This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
Primum Sapienti
Apr 3, 2021, 1:08:29 AM4/3/21
to
littor...@gmail.com wrote:
> Op zondag 28 maart 2021 om 06:23:23 UTC+2 schreef Primum Sapienti:
>
>
>> https://advances.sciencemag.org/content/4/2/eaaq0250.full
> Nasalization by Nasalis larvatus:
> Larger noses audiovisually advertise conspecifics in proboscis monkeys
> Science Advances 21 Feb 2018
> Male proboscis monkeys have uniquely enlarged noses that are prominent adornments, which may have evolved through their sexually competitive harem group social system.
> Nevertheless, the ecological roles of the signals encoded by enlarged noses remain unclear.
> We found significant correlations among nose, body & testis sizes & a clear link between nose size & number of harem females.
> Therefore, there is evidence supporting both male-male competition & female choice as causal factors in the evolution of enlarged male noses.
> We also observed that nasal enlargement systematically modifies the resonance properties of male vocalizations, which probably encode male quality.
> Our results indicate that the audio-visual contributions of enlarged male noses serve as advertisements to females in their mate selection.
> This is the first primate research to evaluate the evolutionary processes involved in linking morphology, acoustics & socio-ecology with unique masculine characteristics.
>
>
> Thanks for this, yes, Nas.larvatus males are allopatric: they swim to other mangroves to establish a harem, no wonder males having a big nose is important.
> This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
>
> OI, BIG NOSE !
Sexual selection.
> Op zondag 28 maart 2021 om 06:23:23 UTC+2 schreef Primum Sapienti:
>
>
>> https://advances.sciencemag.org/content/4/2/eaaq0250.full
> Nasalization by Nasalis larvatus:
> Larger noses audiovisually advertise conspecifics in proboscis monkeys
> Science Advances 21 Feb 2018
> Male proboscis monkeys have uniquely enlarged noses that are prominent adornments, which may have evolved through their sexually competitive harem group social system.
> Nevertheless, the ecological roles of the signals encoded by enlarged noses remain unclear.
> We found significant correlations among nose, body & testis sizes & a clear link between nose size & number of harem females.
> Therefore, there is evidence supporting both male-male competition & female choice as causal factors in the evolution of enlarged male noses.
> We also observed that nasal enlargement systematically modifies the resonance properties of male vocalizations, which probably encode male quality.
> Our results indicate that the audio-visual contributions of enlarged male noses serve as advertisements to females in their mate selection.
> This is the first primate research to evaluate the evolutionary processes involved in linking morphology, acoustics & socio-ecology with unique masculine characteristics.
>
>
> Thanks for this, yes, Nas.larvatus males are allopatric: they swim to other mangroves to establish a harem, no wonder males having a big nose is important.
> This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
>
> OI, BIG NOSE !
littor...@gmail.com
Apr 3, 2021, 12:45:54 PM4/3/21
to
Op zaterdag 3 april 2021 om 07:08:29 UTC+2 schreef Primum Sapienti:
(explanation snipped)
> Sexual selection.
Of course, my boy, sex.selection.
But why the nose, my boy?? Why not another body part?
> Sexual selection.
Of course, my boy, sex.selection.
But why the nose, my boy?? Why not another body part?
Nas.larvatus males are allopatric: they swim to other mangroves to establish a harem, no wonder males having a big nose is important.
This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
OI, BIG NOSE !
This helps explain why (among snub-nosed monkeys) only Nas.larvatus males have such big noses:
OI, BIG NOSE !
littor...@gmail.com
Apr 5, 2021, 2:30:18 PM4/5/21
to
Op zaterdag 3 april 2021 om 18:45:54 UTC+2 schreef littor...@gmail.com:
AFAIK, only humans have a philtrum? This fits perfectly to the inferior part of the esternal nasal septum.
Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
Only complete idiots keep running after kudus & still deny that our ancestors frequently dived for shallow-aquatic foods.
Google "coastal dispersal Pleistocene Homo PPT".
AFAIK, only humans have a philtrum? This fits perfectly to the inferior part of the esternal nasal septum.
Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
Only complete idiots keep running after kudus & still deny that our ancestors frequently dived for shallow-aquatic foods.
Google "coastal dispersal Pleistocene Homo PPT".
DD'eDeN aka note/nickname/alas_my_loves
Apr 5, 2021, 8:56:35 PM4/5/21
to
On Monday, April 5, 2021 at 2:30:18 PM UTC-4, littor...@gmail.com wrote:
> Op zaterdag 3 april 2021 om 18:45:54 UTC+2 schreef littor...@gmail.com:
>
> AFAIK, only humans have a philtrum?
No.
> Op zaterdag 3 april 2021 om 18:45:54 UTC+2 schreef littor...@gmail.com:
>
> AFAIK, only humans have a philtrum?
In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
This fits perfectly to the inferior part of the esternal nasal septum.
I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
littor...@gmail.com
Apr 6, 2021, 7:13:31 AM4/6/21
to
Op dinsdag 6 april 2021 om 02:56:35 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > AFAIK, only humans have a philtrum?
> No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> This fits perfectly to the inferior part of the esternal nasal septum.
> https://dogdiscoveries.com/dogs-philtrum/
Yes, but this groove is very different from our philtrum.
> > AFAIK, only humans have a philtrum?
> No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> This fits perfectly to the inferior part of the esternal nasal septum.
> https://dogdiscoveries.com/dogs-philtrum/
Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
> I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
> I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
DD'eDeN aka note/nickname/alas_my_loves
Apr 6, 2021, 12:31:39 PM4/6/21
to
On Tuesday, April 6, 2021 at 7:13:31 AM UTC-4, littor...@gmail.com wrote:
> Op dinsdag 6 april 2021 om 02:56:35 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > > AFAIK, only humans have a philtrum?
>
> > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > This fits perfectly to the inferior part of the esternal nasal septum.
> > https://dogdiscoveries.com/dogs-philtrum/
> Yes, but this groove is very different from our philtrum.
So what? Most mammals have philtrums, each unique to that specific morphology. People with fetal alcohol syndrome and some other disorders have minimal philtrums.
> Op dinsdag 6 april 2021 om 02:56:35 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > > AFAIK, only humans have a philtrum?
>
> > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > This fits perfectly to the inferior part of the esternal nasal septum.
> > https://dogdiscoveries.com/dogs-philtrum/
> Yes, but this groove is very different from our philtrum.
> Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
Great imagination not based on fossil soft tissues. Aqua-babies don't do that. Macaques don't do that. [Possibly mysticete ancestors did that in some way, moving the balleen from the mustache area similar to Peter Rhys's claims about the descending larynx?]
7bn people today, how many do that when they shower, bathe, swim, dive? How many sleep in shelters? Which is more significant in human evolution?
>
>
> > I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
> Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
When sample size = 1, no pattern can be recognized.
>
> > I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
> Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
littor...@gmail.com
Apr 7, 2021, 4:59:20 AM4/7/21
to
Op dinsdag 6 april 2021 om 18:31:39 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > > > AFAIK, only humans have a philtrum?
> > > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > > This fits perfectly to the inferior part of the esternal nasal septum.
> > > https://dogdiscoveries.com/dogs-philtrum/
> > Yes, but this groove is very different from our philtrum.
> So what?
So what?? So everything.
Have a good look at your philtrum, DD.
Now imagine you had prognathism like all your archaic ancestors:
your philtrum then fits perfectly to the underside of your nose.
> > Most mammals have philtrums, each unique to that specific morphology. People with fetal alcohol syndrome and some other disorders have minimal philtrums.
I think you have an adult alcohol syndrome, DD... :-D
> > Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
> Great imagination not based on fossil soft tissues. Aqua-babies don't do that.
Ah? If so, interesting.
> Macaques don't do that.
Of course. QED.
> [Possibly mysticete ancestors did that in some way, moving the baleen from the mustache area similar to Peter Rhys's claims about the descending larynx?]
??
> 7bn people today, how many do that when they shower, bathe, swim, dive? How many sleep in shelters? Which is more significant in human evolution?
7bn??
> > > I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
> > Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
> When sample size = 1, no pattern can be recognized.
Large brains are seen in most aquatics, airway closure is seen in all aquatics.
Analyse, DD!
Incipient aquatics try to close the airways where possible: nose, larynx, asthma, SIDS, SAS etc.
"The Aquatic Ape Theory and some common diseases"
Medical Hypotheses 24:293-300, 1987.
> > > > AFAIK, only humans have a philtrum?
> > > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > > This fits perfectly to the inferior part of the esternal nasal septum.
> > > https://dogdiscoveries.com/dogs-philtrum/
> > Yes, but this groove is very different from our philtrum.
> So what?
Have a good look at your philtrum, DD.
Now imagine you had prognathism like all your archaic ancestors:
your philtrum then fits perfectly to the underside of your nose.
> > Most mammals have philtrums, each unique to that specific morphology. People with fetal alcohol syndrome and some other disorders have minimal philtrums.
> > Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
> Great imagination not based on fossil soft tissues. Aqua-babies don't do that.
> Macaques don't do that.
> [Possibly mysticete ancestors did that in some way, moving the baleen from the mustache area similar to Peter Rhys's claims about the descending larynx?]
??
> 7bn people today, how many do that when they shower, bathe, swim, dive? How many sleep in shelters? Which is more significant in human evolution?
> > > I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
> > Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
> When sample size = 1, no pattern can be recognized.
Analyse, DD!
Incipient aquatics try to close the airways where possible: nose, larynx, asthma, SIDS, SAS etc.
"The Aquatic Ape Theory and some common diseases"
Medical Hypotheses 24:293-300, 1987.
DD'eDeN aka note/nickname/alas_my_loves
Apr 7, 2021, 6:40:25 AM4/7/21
to
On Wednesday, April 7, 2021 at 4:59:20 AM UTC-4, littor...@gmail.com wrote:
> Op dinsdag 6 april 2021 om 18:31:39 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > > > > AFAIK, only humans have a philtrum?
>
> > > > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > > > This fits perfectly to the inferior part of the esternal nasal septum.
> > > > https://dogdiscoveries.com/dogs-philtrum/
>
> > > Yes, but this groove is very different from our philtrum.
> > So what?
> So what?? So everything.
> Have a good look at your philtrum, DD.
> Now imagine you had prognathism like all your archaic ancestors:
Imagine? Your fallacy leads to much imagination, but not biology.
> Op dinsdag 6 april 2021 om 18:31:39 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
> > > > > AFAIK, only humans have a philtrum?
>
> > > > No. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip.
> > > > This fits perfectly to the inferior part of the esternal nasal septum.
> > > > https://dogdiscoveries.com/dogs-philtrum/
>
> > > Yes, but this groove is very different from our philtrum.
> > So what?
> So what?? So everything.
> Have a good look at your philtrum, DD.
> Now imagine you had prognathism like all your archaic ancestors:
"AFAIK, only humans have a philtrum" MV (repeatedly over 30 years of self-deception).
All my archaic hominin ancestors slept in constructed shelters, as we all do today. Ignoring that reality leads to pseudoscience.
Most mammals have philtrums, google it.
In many species, the rhinarium has a mid-line groove (cleft) – the philtrum – and a wrinkled (crenellated) surface.[3] The rhinarium is a separate sense organ: it is a touch-based chemosensory organ that connects with a well-developed vomeronasal organ (VNO). The rhinarium is used to touch a scent-marked object containing pheromones (usually large, non-volatile molecules), and transfer these pheromone molecules down the philtrum to the VNO via the nasopalatine ducts that travel through the incisive foramen of the hard palate.[4] It also acts as a wind-direction detector: cold receptors in the skin of the rhinarium detect the orientation where evaporative cooling is highest, as determined by the wind direction.
The study of the rhinarium's structure and associated functions has proven of considerable importance in the fields of mammalian evolution and taxonomy.[5] For example, primates are phylogenetically divided into those, such as lemurs, with the primitive rhinarium (Strepsirrhini) and the dry-nosed monkeys (Haplorhini, including apes and humans).
> your philtrum then fits perfectly to the underside of your nose.
> > > Most mammals have philtrums, each unique to that specific morphology. People with fetal alcohol syndrome and some other disorders have minimal philtrums.
> I think you have an adult alcohol syndrome, DD... :-D
> > > Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
>
> > Great imagination not based on fossil soft tissues. Aqua-babies don't do that.
> Ah? If so, interesting.
> > Macaques don't do that.
> Of course. QED.
>
> > [Possibly mysticete ancestors did that in some way, moving the baleen from the mustache area similar to Peter Rhys's claims about the descending larynx?]
>
> ??
> > 7bn people today, how many do that when they shower, bathe, swim, dive? How many sleep in shelters? Which is more significant in human evolution?
> 7bn??
> > > > I guess only humans have a "human-like philtrum", hardly surprising, hardly useful.
>
> > > Very useful: only humans have very large brains, very long & stretched legs, etc.etc.
>
> > When sample size = 1, no pattern can be recognized.
> Large brains are seen in most aquatics, airway closure is seen in all aquatics.
> Analyse, DD!
Google 'biology'.
> Incipient aquatics try to close the airways where possible: nose, larynx, asthma, SIDS, SAS etc.
> "The Aquatic Ape Theory and some common diseases"
> Medical Hypotheses 24:293-300, 1987.
> > > > > Only complete idiots keep running after kudus & still deny that our ancestors frequently dived for shallow-aquatic foods.
> > > > > Google "coastal dispersal Pleistocene Homo PPT".
littor...@gmail.com
Apr 9, 2021, 5:44:10 AM4/9/21
to
Op woensdag 7 april 2021 om 12:40:25 UTC+2 schreef DD'eDeN aka note/nickname/alas_my_loves:
...
> > Have a good look at your philtrum, DD.
...
> Most mammals have philtrums, google it.
Yes, totally different from the human philtrum.
...
...
> > Have a good look at your philtrum, DD.
> Most mammals have philtrums, google it.
...
Primum Sapienti
Apr 10, 2021, 11:44:05 PM4/10/21
to
Abstract
Male proboscis monkeys have uniquely enlarged noses that are prominent
adornments, which may have evolved through their sexually competitive
harem group social system. Nevertheless, the ecological roles of the
signals encoded by enlarged noses remain unclear. We found significant
correlations among nose, body, and testis sizes and a clear link between
adornments, which may have evolved through their sexually competitive
harem group social system. Nevertheless, the ecological roles of the
signals encoded by enlarged noses remain unclear. We found significant
nose size and number of harem females. Therefore, there is evidence
supporting both male-male competition and female choice as causal factors
in the evolution of enlarged male noses. We also observed that nasal
enlargement systematically modifies the resonance properties of male
vocalizations, which probably encode male quality. Our results indicate
that the audiovisual contributions of enlarged male noses serve as
enlargement systematically modifies the resonance properties of male
vocalizations, which probably encode male quality. Our results indicate
advertisements to females in their mate selection. This is the first
primate research to evaluate the evolutionary processes involved in
primate research to evaluate the evolutionary processes involved in
Primum Sapienti
Apr 10, 2021, 11:53:04 PM4/10/21
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littor...@gmail.com wrote:
> Op zaterdag 3 april 2021 om 18:45:54 UTC+2 schreef littor...@gmail.com:
>
> AFAIK, only humans have a philtrum? This fits perfectly to the inferior part of the esternal nasal septum.
Google "philtrum"
> Op zaterdag 3 april 2021 om 18:45:54 UTC+2 schreef littor...@gmail.com:
>
> AFAIK, only humans have a philtrum? This fits perfectly to the inferior part of the esternal nasal septum.
https://en.wikipedia.org/wiki/Philtrum
"In most mammals, the philtrum is a narrow groove that may carry dissolved
odorants from the rhinarium or nose pad to the vomeronasal organ via ducts
"For humans and most primates, the philtrum survives only as a vestigial
medial depression between the nose and upper lip.
or Prader–Willi syndrome.[7][8]
"A study of boys diagnosed with autism spectrum disorders found that a
broader than average philtrum is one of a cluster of physical attributes
associated with autism."
> Together with archaic prognathism, this suggests the nostrils could be closed with the upper lip in He & Hn.
> Only complete idiots keep running after kudus & still deny that our ancestors frequently dived for shallow-aquatic foods.
help you survive in Siberia?
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