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5.1 Somatomotor fi bres – regulate movements and tension in skeletal muscles
5.2 Visceromotor fi bres – parti cipate in the regulati on of acti vity of smooth muscle cells, myocardial cells and glands
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5.2.1 Preganglionic fi bers (C8–L3, S2–S4) – join the ganglia of the sympatheti c trunk via the white rami communicantes
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5.2.2 Postganglionic sympatheti c fi bers (C8–L3) – emerge from the ganglia of the sympatheti c trunk
– rejoin the spinal nerves via the grey rami communicantes
– other fi bres give rise to the sympatheti c trunk or leave the ganglia independently
5.2.3 Postganglionic parasympatheti c fi bers (S2–S4)
– do not synapse in the ganglia of the sympatheti c trunk
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