NESC 2470 Lecture Notes - Sarcolemma, Anti-Gravity, Myasthenia Gravis
26 Nov 2012
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Document Summary
Smooth muscle: digestive tract, arteries, plays role in peristalsis, control of blood pressure and blood flow. Innervation from ans allows speed to be controlled: skeletal muscle. Each fibre innervated by 1 axon branch of a lower motor neuron. Each motor neuron can connect to many muscle fibres. Muscles from each of these groups working against each other are called antagonists. Muscles that work together to move joint in same direction. Muscles tend to be grouped into 3 categories. Axial: control trunk, posture regulating muscles. Involved in locomotive control: neuronal location in the spine in cervical (arms) and lumbar-sacral (legs) segments. Involved in the control of object manipulation: neuronal location in the spine in cervical (arms) and lumbar-sacral (legs) segments. Innervate the somatic musculature in the ventral horn of the spinal cord. Controlled by lower motor neurons: alpha motor neurons. Directly trigger the generation of force by muscles.
