Persistence of the pars externa system of the anterior olfactory nucleus in a microsmatic primate, Callithrix jacchus.

Abstract:

:The pars externa (PE) system of the anterior olfactory nucleus (AON) in a primate, Callithrix jacchus, was defined by its architecture and by its connection patterns with the main olfactory bulb (MOB) as revealed by tracing techniques. Focal, unilateral injections of wheat germ agglutinin-conjugated horseradish peroxidase into the MOB yielded ipsilaterally labelled afferent neurons in all subdivisions of the AON, with the exception of a clearly circumscribed area in the ventrolateral retrobulbar field of the basocaudal frontal lobe; in the contralateral hemisphere, this same area contained intensely stained neurons forming a horizontal flat plate of small neurons. This unique commissural connection pattern parallels the organization of the PE to MOB connection in sub-primates (Schoenfeld and Macrides, 1984, J. Comp. Neurol., 227: 121-135). Thus, despite earlier controversy (Crosby and Humphrey, 1939, J. Comp. Neurol., 71: 121-213), there appears to be a PE system in a microsmatic primate whose organization is quite similar to that in sub-primates.

journal_name

Brain Res

journal_title

Brain research

authors

Reyher CK

doi

10.1016/0006-8993(88)90071-6

subject

Has Abstract

pub_date

1988-08-02 00:00:00

pages

169-75

issue

1

eissn

0006-8993

issn

1872-6240

pii

0006-8993(88)90071-6

journal_volume

457

pub_type

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