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Only carried within segmental spinal nerves:
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Sympathetic - T1-L2, highly organised, widespread effect. Ganglion in sympathetic chain
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Parasympathetic - CN III, VII, IX, X, S2-S4, localised effect. Ganglion near effector organ
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Horner syndrome - injury to sympathetic supply to Head and Neck
- Ptosis - drooping eye lids
- Mitosis - constricted pupil
- Anhydrosis - loss of sweating