Kinesiology 1080A/B Lecture Notes - Lecture 3: Myocyte, Multiple Sclerosis, Motor Neuron

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Divisions of the nervous system: central consists of brain and spinal cord, peripheral. Lateral pathway neurons are bigger, more complex; innervate skeletal muscles with our lateral components of our body. Fingers, arms, legs, more movements have to be carried out. We have to be able to operate each of our digits individually or altogether sometimes. Medial pathway neurons are smaller, less complex, fewer of them. Very important for the trunk, posture, our back, standing and sitting up straight. Easier to communicate with a large group of muscles. Cut open the frog and have spine exposed. Hooked up a frog to a lighting rod and waiting for lightning to strike. When struck, it causes the legs to move. Huge step forward, got us interested into bioelectricity. Myelin sheath allows salutatory conduction fast transmission across/down the axon. If direct, the message goes form the brain down the cns (spinal cord) to the muscle.