Tuesday, January 13, 2015

Physiology of micturition

Detrusor muscle of bladder recieves inhibitory signals by sympathetic hypogastric nerve (not in humans) and  excitatory from parasympathetic pelvic nerves .

Pudendal nerve supplies external urethral sphincter

Sympathetic supply from L1 - L2 region of spinal cord

Parasympathetic and pudendal nerve arise fron S2, S3, S4 segments of spinal cord.

Control from higher centres includes pons storage centre and pons micturition centre which recieves signals also from cerebral cortex.


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