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Control of Autonomic Function

Control of Autonomic Function - Brain stem& spinal cord...

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Control of Autonomic Function: Visceral (autonomic) reflex - similar to somatic reflex arc, except 2-neuron motor chain preganglionic & then postganglionic neuron to the visceral effector - referred pain: since visceral pain afferents travel the same pathways as somatic pain afferents, pain stimuli arising in the viscera may be perceived as somatic in origin (felt in skin of the face, neck, chest or arm) Autonomic Control by Higher Centers:
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Unformatted text preview: - Brain stem & spinal cord: reticular formation of brain stem, pons & medulla regulate heart rate & breathing rate, spinal cord reflexes- Hypothalamus: main integration center (regulates heart activity, blood pressure, body temperature, water balance & endocrine system activity)- Cerebral Cortex: although most autonomic functioning is involuntary, in some cases voluntary control appears possible Homeostatic Imbalance: Hypertension (high blood pressure) may result from increased vasoconstriction by sympathetic fibers (could be stress-induced) page11...
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