Callosal connections of dorsal versus ventral premotor areas in the macaque monkey: a multiple retrograde tracing study.

ABSTRACT:

Background

The lateral premotor cortex plays a crucial role in visually guided limb movements. It is divided into two main regions, the dorsal (PMd) and ventral (PMv) areas, which are in turn subdivided into functionally and anatomically distinct rostral (PMd-r and PMv-r) and caudal (PMd-c and PMv-c) sub-regions. We analyzed the callosal inputs to these premotor subdivisions following 23 injections of retrograde tracers in eight macaque monkeys. In each monkey, 2-4 distinct tracers were injected in different areas allowing direct comparisons of callosal connectivity in the same brain.

Results

Based on large injections covering the entire extent of the corresponding PM area, we found that each area is strongly connected with its counterpart in the opposite hemisphere. Callosa

SUBMITTER: Boussaoud D 

PROVIDER: S-EPMC1314896 | biostudies-literature | 2005 Nov

REPOSITORIES: biostudies-literature