QuestionSBA
QuestionChoice
The parasympathetic supply to structures in the perineum comes from the pelvic splanchnic nerves, which arise from spinal levels S2-S4.
10004659
d
The parasympathetic supply to structures in the perineum comes from the pelvic splanchnic nerves, which arise from spinal levels L4-S4
QuestionChoice
Sensory nerve supply to the labia is from the pudendal nerve, which arises from spinal levels S2-4.
10004660
e
Sensory nerve supply to the labia is from spinal levels L2-4
QuestionChoice
Sphincters and other voluntary muscles in the perineum are supplied by the pudendal nerve (S2-4).
10004656
a
The nerve supply to the anal sphincter is from the pudendal nerve
QuestionChoice
The sensory supply to the scrotum is provided by 4 nerves: the anterior scrotal nerves supply the anterior surface and root of the penis, the posterior scrotal nerves supply the posterior surface, part of the anterolateral surface is supplied by the genitofemoral nerve and perineal branch of the posterior femoral cutaneous nerve supplies part of the inferior surface.
10004658
c
The sensory supply to the scrotum is entirely provided by the perineal branch of the posterior femoral cutaneous nerve
QuestionChoice
The cremaster muscle surrounds the spermatic cord- it acts to raise the testes if they become too cold. This is supplied by the genitofemoral nerve (L1-2).
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b
The cremaster muscle is innervated by the ilioinguinal nerve
Concept
Chapter
2693
4314
Innervation of anal sphincter
Topic
218
Gastro-intestinal
13478
Which statement regarding the innervation of structures in the perineum is correct?
a