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George E. Carvell, PhD, PT   University of Pittsburgh
 
DISTRIBUTED MOTOR CONTROL:BASAL GANGLIA COMPONENTS
KS&J Fig 43-4 p 857
The same form of the Cerebral-Basal Ganglia Loop shown in Fig 2 Holds For All Functional Subdivisions (Fig 43-4):
Oculomotor Circuit
Prefrontal Circuit
Limbic Circuit
Motor Circuit
Fig 43-4 KEY:
ACA = Anterior Cingulate Area (Limbic)
DLPC = Dorsolateral Prefrontal Cortex
FEF = Frontal Eye Fields
LOFC = Lateral Orbitofrontal Cortex
MC = Motor Cortex (Primary Motor: MI)
MOFC = Medial Orbitofrontal Cortex (Limbic)
PMC = Premotor Cortex (Lateral Premotor)
SEF = Supplemental Eye Fields
SMA = Supplemental Motor Area
The basal ganglia have major connections with the cerebral cortex. The ‘generic’ pathway is shown in fig 2. Several cortical areas feed into the striatum where there is a partial overlap. The striatum funnels this partially integrated information to the globus pallidus and substantia nigra where a greater integration occurs. The pallidal and nigral information is sent to the thalamus where there is a full overlap of integrated information. The thalamus feeds back the integrated information to the closed loop cortical target (A). B & C provide open loop connections.
AD&S Fig 2 p 359
Cerebral Cortex
Striatum
Globus
Pallidus & Substantia Nigra
Thalamus
A = Closed Loop Target
B & C = Open Loop Feedforward Sources
AD&S = G.E. Alexander, M.R. DeLong, and P.L. Strick, Parallel Organization of Functionally Segregated Circuits Linking Basal Ganglia and Cortex. Ann Rev Neurosci 9: 357-381, 1986.