PSYC-2102 Lecture Notes - Pontine Nuclei, Hyperkinesia, The Motor

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The central motor system is arranged as a hierarchy of control levels, with the forebrain at the top and the spinal cord at the bottom (see table 14. 1). The highest level concerned with strategy the goal of the movement and the movement strategy that best achieves that goal. The middle level is concerned with tactics the sequences of muscle contractions, arranged in space and time, required to smoothly and accurately achieve the strategic goal. The lowest level is concerned with execution activation of the motor neuron and interneuron pools that generate the goal-directed movement and make any necessary adjustments of posture. The proper functioning of each level of the motor control hierarchy relies so heavily on sensory information that the motor system of the brain might be considered a sensorimotor system. At the highest level, sensory information generates a mental image of the body and its relationship to the environment.

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