MMED1005 Lecture Notes - Lecture 10: Internal Capsule, Motor Neuron, Putamen
7 Jun 2018
School
Department
Course
Professor
The CNS and everyday life
Voluntary movement
Main points:
- Basic plan of the CNS
- The motor functions of the cerebral cortex
o Primary motor cortex
o Corticospinal tract
o Supplementary motor area
o Pre-motor area
o Posterior parietal area
- Blood supply to the cerebral cortex
- Brief overview of the functions of
o Cerebellum
o Basal ganglia
- Examples of conditions caused by lesions in some of these areas
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Main areas of the CNS concerned with motor control:
- Motor areas of the cerebral cortex
- Basal ganglia asal nulei in Sherood
- Cerebellum
- Spinal cord
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Spinal reflexes help to maintain limb position, but the commands for position (voluntary
movements) come from higher centres, including the CEREBRAL CORTEX and the basal
ganglia.
Ventral is the front (anterior), dorsal is the back (posterior)
Areas of the cerebral cortex concerned with movement:
The motor cortex has a somatotopic organisation, very similar to the adjacent sensory
cortex
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Document Summary
The motor functions of the cerebral cortex: primary motor cortex, corticospinal tract, supplementary motor area, pre-motor area, posterior parietal area. Brief overview of the functions of: cerebellum, basal ganglia. Examples of conditions caused by lesions in some of these areas. Main areas of the cns concerned with motor control: Spinal reflexes help to maintain limb position, but the commands for position (voluntary movements) come from higher centres, including the cerebral cortex and the basal ganglia. Ventral is the front (anterior), dorsal is the back (posterior) Areas of the cerebral cortex concerned with movement: The motor cortex has a somatotopic organisation, very similar to the adjacent sensory cortex. But remember that muscles may act around more than one joint. E. g. gastrocnemius is both a flexor of the knee joint and an extensor of the ankle. The knee and ankle are represented in different parts of the motor cortex map, and so the gastrocnemius muscle motoneurons get input from both areas.
