Localisation visual cortex in pigs
jboyd at sfu.ca
Thu Apr 20 14:16:05 EST 2000
In article <38FDB74C.4C174E12 at nero.uni-bonn.de>, Christian Kohler
<koehler at nero.uni-bonn.de> wrote:
> I am looking for any data concerning the visual cortex of dometic pig
> (sus scrofa domesticus). Any information helping me to identify the
> V1-region will be useful. Anatomical data or literatur on the pig's
> brain is welcome too.
> Thanks for your help
Funny you should be looking at V1 in pigs, I mean they are not the most
visual animals in the world, right? What are your interests in pig
My interest in pig visual system came from comparative neuroanatomy. I
was interested in Cytochrome Oxidase blobs in species other than
primates. When I worked in Vivien Casagrande's lab in Vanderbilt, some
doctors down the hall worked on pigs for transplant research. One day,
more on a lark than anything, I asked them for a pig brain. Fixed it by
immersion in 4% paraformaldehyde, flattened the cortex, cut tangential
sections and stained for Cytochrome Oxidase. Didn't see blobs, but from
this experience I can tell you that CO staining is a good way to
visualize the extent of primary visual cortex in this species, as in
most others. Also, the pig brain looks a fair bit like the sheep brain,
and from what I could judge in the flat sections, the extent of primary
visual cortex was mostly similar. The sheep visual cortex has been
studied a little bit.
Clarke PGH, Whitteridge D. The cortical visual areas of the sheep. J.
Physiol. 1976; 256: 497-508.
Pettigrew JD, Ramachandran VS, Bravo H. Some neural connections
subserving binocular visionin ungulates. Brain. Behav. Evol. 1984; 24:
and probably other references that I don't know about.
jboyd at sfu.ca
Simon Fraser University Dept. of Biological Sciences
phone: 604-291-4442 fax: 604-291-3496
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