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chapter13 Integrative Physiology I Control of Body Movement

chapter13 Integrative Physiology I Control of Body Movement...

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Chapter 13 Integrative Physiology I: Control of Body Movement
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About this Chapter Neural reflexes Autonomic reflexes Skeletal muscle reflexes The integrated control of body movement Control of movement in visceral muscles
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Neural Reflexes Table 13-1
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Somatic Motor Reflexes Monosynaptic and polysynaptic somatic motor reflexes Figure 13-1a Stimulus Sensory neuron Receptor Efferent neuron Target cell effector Response (a) A monosynaptic reflex has a single synapse between the afferent and efferent neurons. Spinal cord Integrating center One synapse Somatic motor neuron Skeletal muscle
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Somatic Motor Reflexes Figure 13-1b Response Stimulus Sensory neuron Efferent neuron Interneuron (b) Polysynaptic reflexes have two or more synapses. Target cell effector Spinal cord Integrating center Receptor Synapse 1 Synapse 2
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Postganglionic autonomic neuron Preganglionic autonomic neuron CNS integrating center Sensory neuron Receptor Stimulus Response Target cell Autonomic ganglion Autonomic Reflexes Some visceral reflexes are spinal reflexes no brain involvement, or brain modulated “bashful bladder” / toilet training / goose pimples Figure 13-2
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Skeletal Muscle Reflexes Proprioceptors are located in skeletal muscle, joint capsules, and ligaments Proprioceptors carry input sensory neurons to CNS CNS integrates input signal
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