Burying The Ex Full Movie Download In 13
Calvin Beauchamps
These burying grounds range in date from 1630 to 1841. Gravestones, tomb markers, and monuments honor the many founding members of the community. This includes Revolutionary War heroes and men and women of national and international fame.
The maps listed below correspond to the location numbers listed in the database of legible grave markers. In the location numbers for all the burying grounds except Phipps Street and Walter Street, the letter preceding the slash indicates the name of the burying ground. The letter after the slash indicates the section. For Phipps Street Burying Ground, there are no letters that specify the name of the burying ground. For Walter Street, there is no slash separating the site code from the rest of the number.
Objectives: We tested the possibility that a genetic component underlies marble burying in mice and if there is a genetic correlation with other anxiety-like traits. Since findings reported in the literature indicate that marble-burying behavior reflects an anxiety-like response, we explored the assumption that the novel nature of a marble induces this anxiety. Finally, we investigated how the natural response of a mouse to dig relates to the marble-burying phenomenon.
Methods: We examined ten different inbred mouse strains to determine if marble-burying behavior is genetically regulated and correlated with anxiety-like traits in two other assays. We employed multiple variants of the "traditional" marble-burying assay to address how issues such as the novelty of marbles and digging behavior contribute to marble burying.
Results: Marble-burying behavior varied across strain and did not correlate with anxiety measures in other assays. Multiple tests conducted to reduce the novelty of marbles failed to alter burying behavior. Additionally, digging behavior correlated with marble burying, and the presence of marbles did not significantly impact the digging response.
Conclusions: Our results indicate that mouse marble burying is genetically regulated, not correlated with other anxiety-like traits, not stimulated by novelty, and is a repetitive behavior that persists/perseveres with little change across multiple exposures. Marble burying is related to digging behavior and may in fact be more appropriately considered as an indicative measure of repetitive digging.
On individual placement in a cage with 20 evenly spaced glass marbles, female MF1 mice buried 7.8 +/- 0.2 marbles. Olfactory stimuli from experimenters hands and sex of mice had no influence on number buried, but most marbles were buried when they were evenly spaced. There was no habituation to these novel objects on serial testing or prehousing with marbles and, in a two-compartment box, mice did not avoid marbles, spending half their time on the marble side. In the pharmacological experiments, locomotor activity was measured separately to indicate the possibility of nonspecific effects. The anxiogenic agents yohimbine and ethyl-beta-carboline-3-carboxylate (beta-CCE) did not enhance burying, yohimbine decreased burying at doses also reducing locomotor activity. Diazepam effects depended on dose: 0.1 mg/kg increased burying, 0.25 mg/kg had no effect and 1.0-5.0 mg/kg reduced it. Diazepam increased locomotor activity from 0.1-2.5 mg/kg and had no effect at 5.0 mg/kg. Zimeldine, 10.0 mg/kg, reduced burying but not locomotor activity. Inhibition of marble burying may be a correlational model for detection of anxiolytics rather than an isomorphic model of anxiety.
Nestlet shredding is another test that takes advantage of the natural proclivity of mice to shred practically any material for nest construction. Males and female mice are both reliable shredders. As in the marble burying test, a single investigator can set up large numbers of test cages and then leave the test room for the duration of the test session. Figures 3A and 3B show two cages from WT mice after conclusion of the test. The nestlets in Figures 3A and 3B were 11% and 27% shredded, respectively. Figures 3C and 3D show representative nestlets from two TPH2 KO mice and show that nestlets are much more extensively shredded (i.e. 51% and 100% shredded in Figures 3C and 3D, respectively). Because nestlets are carefully weighted before placement into the cage, the analytical task in this test is to weigh the remainder of the intact nestlet after test completion to quantify the amount of nestlet shredded. In our experience, two issues can slightly complicate weighing of the nestlets after shredding. First, if the nestlets are even slightly moist, the weight of the remaining nestlet will be artificially high. To avoid this situation, we allow shredded nestlets to dry O/N to remove any moisture and we withhold food and water bottles (as sources of moisture) from cages during the test. Second, the shredded nestlets are not always as "cleanly" or totally shredded as in Figure 3D. It can be seen that some nestlets contain adherent material that has clearly been shredded from the main body of the nestlet, but is still clinging to the intact part. As in the marble burying test, we use 2-3 raters to judge the amount of adherent but shredded material that should not be considered part of the remaining intact nestlet. This material is then carefully teased away from the intact nestlet with forceps and the remaining unshredded portion is weighed. An example of this condition is presented in the inset to Figure 3A with arrows pointing to material that should be removed prior to weighing or the remaining nestlet. Figure 4 (reprinted from Angoa-Pérez et al.15 with permission from Wiley) illustrates a representative outcome of nestlet shredding when comparing WT mice to TPH2 KO mice. It can be seen that TPH2 KO mice show significantly more shredding than WT controls ( 50% versus 10% shredded, respectfully). The nestlet shredding test is a simple yet robust and sensitive method for assaying repetitive, compulsive-like behaviors in mice. Nestlet shredding is also a good compliment to the marble burying test and its effectiveness in testing a wide variety of drugs for their effects on repetitive behaviors has been well established10.
Figure 1. These photographs show representative cages before and after the marble burying test using WT and TPH2 KO mice as subjects. Panels A-C are photographed from above the cages and panels D-F are photographed along the surface of each cage. A) An example of a typical cage prior to introduction of a test subject, showing initial marble alignment; B) An example of a representative cage from a WT mouse after burying. In this example, few marbles are buried (N = 3) or displaced from their initial location; C) An example of a typical cage after testing a TPH2 KO mouse showing that 17 of the 20 marbles were buried in this case. Unburied marbles are indicated with arrows; D) A view of the bedding surface before introduction of a test mouse; E) An example of alterations in the bedding surface after removal of the WT mouse and F) An example of the bedding surface after testing a TPH2 KO mouse. The photograph in panel F cannot fully demonstrate in two-dimensions the disruption of the bedding material caused by the TPH2 KO mouse. Not only have most marbles been buried, the surface of the bedding appears to have been excavated by the TPH2 KO mouse. Areas of large troughs and peaks are clearly visible and it is typically the case that mice will dig and displace all bedding from one corner of the cage. Click here to view larger image.
Figure 2. This graph shows typical performance of WT and TPH2 KO mice on the marble burying test. Observers blind to the genotype of test mice score each cage for the number of marbles buried (i.e. two-thirds of their surface covered with bedding). The scores for each test subject are averaged for all scorers and plotted as number of marbles buried versus mouse genotype. TPH2 KO mice (N= 20; 10 males and 10 females) bury significantly (two-way ANOVA, F1,66 = 35.61, p
With respect to existing methods (e.g. genetic, pharmacological, and neurodevelopment models) the marble burying and nestlet shredding tests have numerous advantages. Both are readily available to most labs without the need for sophisticated and expensive equipment. These tests are simple to apply, they can be formatted for high-throughput analyses and they are easy to score reliably. With slight modifications, these models can provide additional valuable information that can be useful when studying more complex behaviors and disorders. For instance, test sessions in both models can be video-taped and mice can be scored for locomotor activity, distance traveled, time spent moving, and percent of time spent in each region of the test cage (e.g. center versus perimeter). Measures such as these can provide revealing information on levels of anxiety, particularly if using subject mice with genetic manipulations that might be anxiogenic. Drug treatments can also modify repetitive behaviors indirectly by altering locomotor activity, so the parallel measure of this parameter along with marble burying or nestlet shredding could reveal drug-induced effects on movement.
One limitation of the marble burying test relates to the question of whether marble burying actually represents compulsive-like behavior or if the marbles evoke novelty-induced or anxiety-like responses in mice. Careful study has shown that the glass marbles do not serve as a fear- or anxiety-producing stimulus19,20 and attempts to habituate mice to the marbles do not change burying. It could also be argued that marble burying is actually secondary to digging and burrowing in rodents. Therefore, mice do not bury marbles specifically but in the process of digging and burrowing, marbles become covered by the bedding. This potential limitation can be tempered by the observation that digging correlates with burying and not with other behaviors emitted during this test19-21. Another limitation of marble burying is under-estimation of the behavior in animals that show excessive amounts of digging and burrowing (e.g. TPH2 KO mice). These mice dig intensely in the absence of any objects in the test cage16 and a similar situation could occur in other genetically modified mice or in subjects treated with certain drugs. Thus, it is likely that marbles are buried and subsequently uncovered, to be scored inaccurately as unburied. Finally, a limitation that applies to both the marble burying and nestlet shredding tests is the fact that mice will often climb on and hang from the wire cage tops. This competing behavior will diminish the amount of time spent in marble burying and nestlet shredding. This climbing behavior is natural in rodents and could represent a repetitive behavior as well. However, to avoid this potential problem, flat wire tops or filter-top covers can be used.
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