Storage and voiding of urine role of the urinary bladder
Storage and voiding of urine - role of the urinary bladder
L1 L2 Sympathetics 8 Parasympathetics Trigone S3 S4 -Bladder neck (posterior urethra） Pudendal Figure 26-6 External sphincter Urinary bladder and its innervation
Micturition Def:the process by which urine in the bladder is voided Filling of bladder Activation of micturition reflex Urination or desire to urinate
Micturition Def: the process by which urine in the bladder is voided Filling of bladder Activation of micturition reflex Urination or desire to urinate
Volume/pressure relationship in the urinary bladder 40 Micturition 11 contractions 1 111 ⑧ 20 。 111 1111 10 Basal cystometrogram 0 100 200 300 400 Volume(milliliters)
Volume/pressure relationship in the urinary bladder
Micturition reflex Stretch receptor in the bladder wall Pelvic nerve Sacral segment of the spinal cord Pelvic nerve Smooth muscle of the bladder
Micturition reflex Stretch receptor in the bladder wall Pelvic nerve Sacral segment of the spinal cord Pelvic nerve Smooth muscle of the bladder
Inhibitory centers (pons cerebral cortex) Micturition reflex External sphincter Facilitatory centers (cerebral cortex) tonic
Micturition reflex External sphincter tonic Inhibitory centers (pons & cerebral cortex) Facilitatory centers (cerebral cortex)
Regulation centre in brain ·Facilitatory and inhibitory centers in Caoum the pons Centers in the cerebral cortex,the outer portion of the brain (inhibitory mostly) Brainstem Pons Cerebellum Spinal cord
Regulation centre in brain • Facilitatory and inhibitory centers in the pons • Centers in the cerebral cortex, the outer portion of the brain (inhibitory mostly)
Central/voluntary control ↓ Peripheral/involuntary reflex ↓ Micturition
Central/voluntary control Peripheral/involuntary reflex Micturition
Urinary bladder and the nervous control _Ureter L1 L2 Body Sympathetics L4 L5 92 Trigone 3 Parasympathetics Bladder neck (posterior urethra) Pudendal External sphincter
Urinary bladder and the nervous control