Afferent Autonomic Nervous System Sympathetic

Terminate in spinal cord in intermediate zone of grey matter - in relation to preganglionic neurons.

Function-. Important in the appreciation of visceral pain. Parasympathetic

Afferent fibres from the mouth and pharynx, and respiratory, cardiac and gastrointestinal systems, travelling in the VII, IX and X cranial nerves, terminate in the nucleus of tractus solitarius.

Function: Important in maintaining visceral reflexes.

The sacral afferents end in the S2-S4 region in relation to preganglionic neurons. NEUROTRANSMITTER SUBSTANCES

Sympathetic

Parasympathetic

J^ acetyl ganglion o ch0|ine

A acetyl choline target smooth muscle organ heart salivary glands i acetyl choline O

acetyl A choline acetyl X acetyl choline Q choline adrenal medulla sweat glands blood blood vessels in vessels skeletal muscle heart

circulating noradrenaline adrenaline and noradrenaline

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