QuestionSBA
QuestionChoice
This is not the correct answer. This is the sympathetic innervation for the midgut which extends from the common bile duct to the proximal two-thirds of the transverse colon, whereas the sigmoid colon is part of the hindgut.
10027370
e
Lesser splanchnic nerve
QuestionChoice
This is the correct answer. The sigmoid colon is part of the hindgut which extends from the distal one-third of the transverse colon to the anorectal junction (cloacal membrane). It receives innervation from the inferior mesenteric plexus where the sympathetic innervation is from the lumbar splanchnic nerve and the parasympathetic innervation is from the pelvic splanchnic nerve.
10027366
a
Pelvic splanchnic nerve
QuestionChoice
This is not the correct answer. This is the parasympathetic innervation for the foregut which extends from the oesophagus to the proximal duodenum just before the opening of the common bile duct, whereas the sigmoid colon is part of the hindgut. The foregut arises from the endoderm and is therefore developmentally distinct from the midgut and hindgut. The vagus nerve and the enteric nervous system contribute to the innervation of the foregut structures.
10027368
c
Vagus nerve
QuestionChoice
This is not the correct answer. This is the parasympathetic innervation for the midgut which extends from the common bile duct to the proximal two-thirds of the transverse colon, whereas the sigmoid colon is part of the hindgut.
10027369
d
Superior mesenteric plexus
QuestionChoice
This is not the correct answer. While it arises from the inferior mesenteric plexus which is the nerve supply for the hindgut organs, the lumbar splanchnic nerve is the sympathetic innervation to the hindgut, not the parasympathetic innervation.
10027367
b
Lumbar splanchnic nerve
Concept
Chapter
2693
3944
Development of the hindgut
Topic
171
Embryology
17871
What is the parasympathetic nerve innervating the sigmoid colon?
a