June 20, 2024

Nerve supply of the bladder is explained in the figure below with differences between the autonomic and autonomous bladder.

Nerve supply of bladder
Autonomic BladderAutonomous Bladder
Damage above sacral plexus (Suprasacral)Damage to sacral plexus
UMN Type (Spastic)LMN Type (Atonic)
Reflex emptying of the bladderReflex activity lost
Small capacity -> Hypertonic bladder empty suddenlyOverflow incontinence (No spinal reflex)
Incomplete evacuation -> Residual urine (+)High residual volume ( >200-300 cc )

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