Antidromic vs orthodromic

[edwinan...@gmail.com]

Hi,

I have a question about what is happening in this video at 00:02:12 -

http://www.youtube.com/watch?v=flgHRvxB2C4#t=132s.

Muscle spindles carrying sensory response to the DRG (towards spinal) should be orthodromic conduction Is n't it?.

Thanks!

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[Swarnab Dutta(Teaching Assistant)]

Hello.

Antidromic conduction refers to the travelling of an action potential from the periphery towards the cell body. While orthodromic conduction refers to an action potential travelling away from the cell body. 

Since the Dorsal root Ganglion has the cell bodies of the proprioceptor neurons(muscle spindles), sensory responses travelling towards the DRG is antidromic.