GHRIGG01@ulkyvm.bitnet ("Garrett H. Riggs") (05/09/91)
Does anyone know of a reference that delineates the mandatory synapses in the ascending projections of the auditory system? More specifically, does anyone know if the inferior colliculus is a mandatory synapse in this system? A reference would be wonderful, but unreferenced opinions are also welcome! Thanks. Garrett Riggs GHRIGG01@ULKYVM.BITNET
brp@bandit.berkeley.edu (Bruce Raoul Parnas) (05/09/91)
In article <9105081710.AA04272@genbank.bio.net> GHRIGG01@ulkyvm.bitnet ("Garrett H. Riggs") writes: > >Does anyone know of a reference that delineates the mandatory synapses in the >ascending projections of the auditory system? More specifically, does anyone >know if the inferior colliculus is a mandatory synapse in this system? > the best reference i know for auditory physiology is "An Introduction to the Physiology of Hearing", by J.O. Pickles. It will surely have the answer to this question and many others about auditory physiology. To give something of an answer myself: it is hard to say what is really mandatory. The Superior Olivary complex is generally assumed to be responsible for spatial localization. I've heard recently of work (sorry, i don't have a reference) where the SOC was lesioned and animals could still localize!? according to pickles, the ic receives input which contains information about timing (spatial localization) and complex frequency analysis. it seems to be a center for both localization and source identification. as such, it would seem to be a critical synapse in the ascending pathway. >Garrett Riggs >GHRIGG01@ULKYVM.BITNET bruce (brp@bandit.berkeley.edu) bruce (brp@bandit.berkeley.edu)
ddoherty@ics.uci.edu (Donald Doherty) (05/10/91)
All ascending auditory pathways must synapse at the inferior colliculus before going to the thalamus (medial geniculate). If anyone has a reference to data contrary to this assertion please let me know. Donald Doherty Dept. of Psychobiology University of California Irvine, CA 92717
svolman@magnus.acs.ohio-state.edu (Susan F Volman) (05/14/91)
There are in fact some projections from the nuclei of the lateral
lemniscus to the thalamus that bypass the inferior colliculus.
I don't have time to find a reference, but most anatomy books
do acknowledge them.
Are these inputs major enough to be involved in important
aspects of auditory processing? I don't know whether
this question has been studied much, if at all.