QuestionSBA
QuestionChoice
This is the correct answer. The nervous supply to the bladder consists of autonomic and somatic input. In terms of autonomic input, the hypogastric nerve (T12-L2) provides the sympathetic supply which allows the bladder to relax the detrusor muscle to promote urine retention, while the pelvic nerve (S2-S4) provides the parasympathetic supply which allows the bladder to contract the detrusor muscle to stimulate micturition. In terms of somatic innervation, the pudendal nerve (S2-S4) innervates the external urethral sphincter and provides voluntary control over micturition. In addition to the efferent nerves supplying the bladder, there are sensory (afferent) nerves that signal the need to urinate when the bladder becomes full.
10027441
a
Pelvic nerve
QuestionChoice
This is not the correct answer. This is the sympathetic innervation to the bladder. The nervous supply to the bladder consists of autonomic and somatic input. In terms of autonomic input, the hypogastric nerve (T12-L2) provides the sympathetic supply which allows the bladder to relax the detrusor muscle to promote urine retention, while the pelvic nerve (S2-S4) provides the parasympathetic supply which allows the bladder to contract the detrusor muscle to stimulate micturition. In terms of somatic innervation, the pudendal nerve (S2-S4) innervates the external urethral sphincter and provides voluntary control over micturition. In addition to the efferent nerves supplying the bladder, there are sensory (afferent) nerves that signal the need to urinate when the bladder becomes full.
10027442
b
Hypogastric nerve
QuestionChoice
This is not the correct answer. This is the somatic innervation to the bladder, more specifically the external urethral sphincter. It provides voluntary control over micturition. The nervous supply to the bladder consists of autonomic and somatic input. In terms of autonomic input, the hypogastric nerve (T12-L2) provides the sympathetic supply which allows the bladder to relax the detrusor muscle to promote urine retention, while the pelvic nerve (S2-S4) provides the parasympathetic supply which allows the bladder to contract the detrusor muscle to stimulate micturition. In addition to the efferent nerves supplying the bladder, there are sensory (afferent) nerves that signal the need to urinate when the bladder becomes full.
10027443
c
Pudendal nerve
QuestionChoice
This is not the correct answer. The sacral splanchnic nerves are not involved in the parasympathetic innervation of the bladder. In general, splanchnic nerves are bilateral visceral autonomic nerves that consist of the thoracic, lumbar, sacral and pelvic splanchnic nerves. However, all of these except for the pelvic splanchnic nerves (parasympathetic) provide sympathetic innervation to the respective organs.
10027445
e
Sacral splanchnic nerves
QuestionChoice
This is not the correct answer. This is the sympathetic innervation to the rectum, alongside the superior and inferior hypogastric plexuses
10027444
d
Lumbar splanchnic nerves
Concept
Chapter
2693
5783
Urinary bladder
Topic
308
Pelvic anatomy
17886
What is the parasympathetic supply to the bladder?
a