AIIMS NOV 2015 Anatomy

Q-1. Diaphragm dose not develop from
a) Pleuro-peritoneal membrane
b) Pleuro-pericardial fold
c) Body wall
d) Septum transversum

Answer: Pleuro-pericardial fold
Explanation:
The diaphragm develops from four embryonic structures:
Septum transversum
Pleuro-peritoneal membranes
Dorsal mesentery of the esophagus
Body cavity wall

Q-2. Pronator teres syndrome is due to involvement of which of the following nerve?
a) Median nerve
b) Radial nerve
c) Ulnar nerve
d) Musculo-cutaneous nerve

Answer: Median nerve
Explanation:
Entrapment of the median nerve in the proximal forearm is seen in two forms: the pronator teres syndrome, and the anterior interosseous nerve (or Kiloh-Nevin) syndrome.

Q-3. Meralgia paresthetica is due to involvement of
a) Lateral cutaneous nerve of thigh
b) Femoral nerve
c) Obturator nerve
d) Genito-femoral nerve

Answer: Lateral cutaneous nerve of thigh
Explanation:
Meralgia paresthetica is commonly due to focal entrapment of the lateral femoral cutaneous nerve (A branch of lumbar plexus) as it passes through the inguinal ligament.
The diagnosis can be confirmed by nerve conduction studies.
The lateral femoral cutaneous nerve (L2 and L3) is responsible for the sensation of the antero-lateral thigh.
It is a purely sensory nerve and has no motor component.

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