Kinesiology 3480A/B Lecture Notes - Lecture 7: Peripheral Vision, Receptive Field, Victorian Era

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The central nervous system (cns): which contains - The peripheral nervous system (pns): which contains - The autonomic division: involved in regulatory functions like heart rate and respiration (regulates internal environment and carries information from the cns to the regulatory organs) The somatic division: contains sensory systems such as muscle spindles (extrafusal muscle fibres) and the vestibular system. Cerebral cortex at the top of the hierarchy, sends messages to subcortical structures. Think of the thalamus, basal ganglia, pons and cerebellum as being second in command, just rely the signal from the cerebral cortex, or modify the signals. Neurons and the neuromuscular system: specific class of neurones shown - alpha motor neuron. Alpha motor neuron exists in the spinal cord (throughout the top and bottom) The axon leaves the spinal cord and synapse with extrafusal muscle fibres. The axon is heavily myelinated, because it can propagate action potential very quickly. Many different types of neurons: motor (efferent) neurons.

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