Vasomotor sudomotor' (sweating) piloerectors
Autonomic fibres in peripheral nerve to blood vessels, sweat glands and piloerector muscles in skin
2 Pupillary dilatation.
3 Cardiac acceleration. ^ Bronchodilator.
® Adrenal gland - adrenaline 8 and noradrenaline release.
9 Bowel 10 11 12
L1 Bladder 2
(decreases smooth muscle activity: stimulates sphincters).
Non-myelinated postganglionic fibres (grey ramus)
. Myelinated preganglionic fibres
Fibres which pass through the sympathetic ganglion to synapse on a prevertebral ganglion, e.g. coeliac or mesenteric ganglia constitute the splanchnic nerves and innervate the viscera.
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