BIOL-3160 Lecture Notes - Lecture 17: Sensory Neuron, Motor Neuron, Action Potential
30 Oct 2017
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Document Summary
Cns communicates w/ peripheral body structures through . Exhibit somatotopy (meaning paired) composed of 2-3 neurons. Conducts info about limb positioning - touch - precise pressure/vibration. Conducts proprioceptive info to cerebellum for processing to coordinate body. Major routes for transmitting postural input to cerebellum. Critical for regulation of posture, balance, coordination. Descending pathways in brain and spinal cord control skm activity. Comprised of at least 2 motor neurons. Initiate motor commands for activities that occur at subconscious. Helps control pattern of somatic motor activity. Lateral pathway - regulate/control precise, discrete movements. Medial pathway - regulate muscle tone and movement of head/neck. Receive impulses from entire cerebral cortex as well as limbic system. Provide patterned background movements needed for conscious motor activity. Role of cerebellum follows activity to see if carried out correctly. Influence exerted by indirectly affect excitability of motor neurons. Coordinates movements by specifying exact timing of control signals to diff muscles.
