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Multiple Output Channels in the Basal Ganglia

1993; American Association for the Advancement of Science; Volume: 259; Issue: 5096 Linguagem: Inglês

10.1126/science.7679223

1095-9203

John E. Hoover, Peter L. Strick,

Neuroscience and Neuropharmacology Research

The neural circuits that link the basal ganglia with the cerebral cortex are critically involved in the generation and control of voluntary movement. Retrograde transneuronal transport of herpes simplex virus type 1 was used to examine the organization of connections in the cebus monkey between an output nucleus of the basal ganglia, the internal segment of the globus pallidus (GPi), and three cortical areas: the primary motor cortex, the supplementary motor area, and the ventral premotor area. Spatially separate regions of the GPi were labeled after virus injections into each cortical area. The GPi projects to multiple cortical motor areas, and this pallidal output is organized into discrete channels. This information provides a new anatomical framework for examining the function of the basal ganglia in skeletomotor control.