BILD 12 Lecture Notes - Lecture 10: Peristalsis, Sensory System, The Motor
7 Jul 2019
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Document Summary
The motor system, main functions of the nervous system, sense the environment, sensory systems, move the body, voluntary movements, skeletal muscles. Involuntary movements: heartbeat, peristalsis (intestines, blood pressure control, locked-in syndrome, fully conscious but paralyzed, sensory systems cognition normal, voluntary movements almost completely missing, julia tavalaro, suffered stroke, believed to be in vegetative state. Is now author and poet: slowly regained abilities. Implication in spinal cord injuries: motor neuron activity and muscle contraction, motor neurons release neurotransmitter to muscles, motor neuron action potentials lead to muscle contraction, more action potentials = stronger contraction. Involuntary, reproducible movements in response to a stimulus: locomotion. Parkinson"s disease: tremors, slowness of movement, dif culty in initiating willed movements, neuronal death in the basal ganglia, dopaminergic neurons in the substantia nigra, reduced excitation to motor cortex, huntington"s disease, spontaneous, uncontrollable, and purposeless movements. Chorea : neuronal death in the basal ganglia.
