Kinesiology 1080A/B Lecture Notes - Lecture 2: Luigi Galvani, Alpha Motor Neuron, Sciatic Nerve
27 Nov 2016
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Two main divisions - cns is of interest. Pns is involved in autonomic functions predominantly; controls somatic division which is responsible for proprioceptive sense; sensory organs communicate to cns via pns somatic system (ex/skin, vestibular system, proprioceptive system, etc) Historical view of hierarchy in ns, not necessarily correct. Think of the cerebral cortex as the big boss , it tells everyone else what to do and when to do it. Think of the thalamus, basal ganglia, pons, and cerebellum as being second in command (modifiers of signals from cerebral cortex) The brainstem is third in command, and spinal cord is. Animal electricity - now referred to as bioelectricity. Prior to his discover, people thought movement occurred by shifting fluid in the body to muscles. Stimulus further down axon of alpha motor neuron; muscle contracts sooner than in condition 1. Used isolated muscle and motor nerve of a frog. Measured time between electrical stimulation and muscle contraction.
