PSYCH 110 Lecture Notes - Lecture 15: Transcranial Magnetic Stimulation, Basal Ganglia, Motor Neuron
Document Summary
Motor neurons in spinal cord regulate muscle contraction. Make synapses onto the motor neurons motor neurons then tell muscles to contract. **drawing from board: prefrontal cortex or sensory association secondary motor areas (premotor + supplementary) primary motor cortex (mi) motor neuron + interneuron muscles. Something about the cerebellum and basal ganglia slide. Descending neuron/pathway because it is going down from brain to spinal cord, simple pathway. Corticospinal tract - control arms and legs. Neurons in motor cortex control multiple motor neurons. Not a single neuron controlling one motor neuron, will control multiple motor neurons, not just 1:1 organization. If a patient has damage to the right side of their spinal cord at l1 (lower back), only right leg paralyzed. The primary motor cortex is arranged in a somatotopic map . M1 is in frontal lobe, anterior to s1. More area in motor cortex means more fine/intricate movements.
