The claustrum of the sheep and its connections to the visual cortex.

Abstract:

:The present study analyses the organization and selected neurochemical features of the claustrum and visual cortex of the sheep, based on the patterns of calcium-binding proteins expression. Connections of the claustrum with the visual cortex have been studied by tractography. Parvalbumin-immunoreactive (PV-ir) and Calbindin-immunoreactive (CB-ir) cell bodies increased along the rostro-caudal axis of the nucleus. Calretinin (CR)-labeled somata were few and evenly distributed along the rostro-caudal axis. PV and CB distribution in the visual cortex was characterized by larger round and multipolar cells for PV, and more bitufted neurons for CB. The staining pattern for PV was the opposite of that of CR, which showed densely stained but rare cell bodies. Tractography shows the existence of connections with the caudal visual cortex. However, we detected no contralateral projection in the visuo-claustral interconnections. Since sheep and goats have laterally placed eyes and a limited binocular vision, the absence of contralateral projections could be of prime importance if confirmed by other studies, to rule out the role of the claustrum in stereopsis.

journal_name

J Anat

journal_title

Journal of anatomy

authors

Pirone A,Graïc JM,Grisan E,Cozzi B

doi

10.1111/joa.13302

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

1-12

issue

1

eissn

0021-8782

issn

1469-7580

journal_volume

238

pub_type

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