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Some claustro‐cortical connections in the cat and baboon as studied by retrograde horseradish persocidase transport
Author(s) -
Riche D.,
Lanoir J.
Publication year - 1978
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901770306
Subject(s) - baboon , neuroscience , biology , anatomy , premotor cortex , horseradish peroxidase , axoplasmic transport , cortex (anatomy) , dorsum , biochemistry , enzyme , endocrinology
1. The mammalian Claustrun (Cl) is a convergent multisensory structure of unknown function, and disputed ontogenetic origin. Its cortical projections, hitherto unknown, have been studied in cat and baboon by means of the horseradish peroxidase (HRP) technique. HRP was injected into the gyrus proreus (frontal eye field) of cats, and separately into the frontal eye fields, visual areas, and motor‐premotor areas of the baboon cortex. 2. Differential retrograde transport to the Cl was demonstrated, such that in the cat the ipsilateral dorsal Cl was shown to be the principal rogin of claustroproreate projections. In the baboon, the whole Cl projects onto area 8, while only the posteroventral part of the nucleus sends efferents to the visual cortes. The projection to the motor and premotor areas is present, but does not seem to be “essential.” 3. Discussion of the physiological literature, togetehr with anatomical evidence of reciprocal cortico‐claustral projections to closely similar regions of the Cl lead to the suggestion that the Cl is concerned with the integration of messages subserving visually‐directed movements. Some other functional implications are also discussed.