HMB200H1 Chapter Notes - Chapter 14: Cerebral Peduncle, Lesion, Red Nucleus
Document Summary
1) highest level basal ganglia, neocortex: strategy body and environment. 2) middle level motor cortex, cerebellum: tactics sequences of contractions to achieve goal. 3) lowest level brain stem, spinal cord: execution motor neurons, goal directed movement. Brain spinal cord: lateral column of spinal cord. Direct cortical control: ventromedial column of spinal cord. Lateral pathways: corticospinal and rubrospinal tracts. Ventromedial pathways: reticulospinal, vestibulospinal and tectospinal tracts. Corticospinal path: corticospinal tract medullary pyramid (decussate) cerebral peduncle internal capsule motor cortex. Rubrospinal tract pons (decussate) red nucleus motor cortex. Lesion = no fractional movement for arms and hands. Voluntary movements are slower and inaccurate.
