KIN 3513 Chapter : Ch 4 Notes
15 Mar 2019
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-one of the biggest challenges for motor physiology is to understand how we can move as adaptively and effortlessly as we do. Basic knowledge needed to understand and appreciate the complexity, capabilities, and limitations of our neuromotor system. Most are neurotransmitters (chemicals) (strengthened with activity and weakened without) Is the motor neuron and the muscle fibers that it innervates. Number of muscle fibers in a motor unit are different. In general the more muscle fibers in a motor unit the less precise. The size principle: recruitment of smallest first and systematically progress to the largest last. This order reduced the degree of freedom to recruit. A complex system that is critically involved with a variety of systems. The two major parts of the spinal cord. Anterolateral system: pain, temperature, some touch, some pressure. Inhibition of flex and ext muscles of hands and fingers. 1012 to 1014 neurons with each having up to 104 synaptic connections.
