Outline 35 2008 Movement and motor control

Outline 35 2008 Movement and motor control - Lecture 35:...

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Lecture 35: MOVEMENT AND MOTOR CONTROL Summary . Muscles and skeletal elements work together to generate movement. Of the three types of skeletons, we are most familiar with endoskeletons (bone and muscle). Skeletal muscle is a highly organized system from the level of whole muscles to the molecular architecture of contractile proteins. Muscle contraction occurs when contractile filaments, actin and myosin, slide past one another to produce contractile force. Muscle contraction is initiated by neural activity releasing neurotransmitter at the neuromuscular junction. Contraction is regulated by release of the second messenger Ca 2+ . Different types of muscles have different physiological properties, and are adapted for different functions. Simple reflexes are mediated by networks of neurons and can involve inhibition of ipsilateral antagonistic muscles at the same joint and excitation of several contralateral antagonistic muscles at several joints. Repetitive muscular contraction during locomotion is the most energetically expensive metabolic activity
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This note was uploaded on 09/13/2009 for the course BIO 1110 taught by Professor Randywayne during the Fall '09 term at Cornell University (Engineering School).

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Outline 35 2008 Movement and motor control - Lecture 35:...

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