NBME Anatomy Shelf Exam 2026
Questions and Answers
Radial Nerve splits into ____________ & _____________ - Correct answer-Deep
radial (motor) and superficial (sensory) at the the level of the radial bone head
A fracture of the midshaft of the humerus leads to - Correct answer-*Radial Nerve
Injury
*Loss of extensors in the forearm, hand, metacarpals, and phalanges --> *Wrist
drop*
Radial nerve innervates - Correct answer-brachioradialis and extensor carpi radialis
longus before it splits
Deep radial nerve innervates - Correct answer-supinator and the extensor carpi
radialis brevis
After it pierces the supinator... - Correct answer-Deep radial n. becomes posterior
interosseus n.
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, A *supracondylar fracture* of the humerus and/or a *compression in the carpal
tunnel* injures the ... - Correct answer-the median nerve
A *supracondylar fracture* of the humerus - Correct answer-*Fracture at the distal
end.
*Common in kids when they fall with hand outstretched.
Damaged median nerve ... - Correct answer-loss of pronation, opposition of the
thumb, and flexion of the lateral two IP joints and impairment of the medial two IP
joints
testicular torsion - Correct answer-In the absence of trauma, lack of cremasteric
reflex along with 10/10 groin pain in an adolescent male. An emergency
The nerve(s) of Cremaster reflex - Correct answer-Genitofemoral nerve (L1-L2)
*The "femoral" portion of this nerve supplies skin sensation to the upper anterior
thigh.
*"Genito" portion of the nerve travels with the spermatic cord to innervate the
cremaster muscle and the anterior scrotal skin.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Questions and Answers
Radial Nerve splits into ____________ & _____________ - Correct answer-Deep
radial (motor) and superficial (sensory) at the the level of the radial bone head
A fracture of the midshaft of the humerus leads to - Correct answer-*Radial Nerve
Injury
*Loss of extensors in the forearm, hand, metacarpals, and phalanges --> *Wrist
drop*
Radial nerve innervates - Correct answer-brachioradialis and extensor carpi radialis
longus before it splits
Deep radial nerve innervates - Correct answer-supinator and the extensor carpi
radialis brevis
After it pierces the supinator... - Correct answer-Deep radial n. becomes posterior
interosseus n.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, A *supracondylar fracture* of the humerus and/or a *compression in the carpal
tunnel* injures the ... - Correct answer-the median nerve
A *supracondylar fracture* of the humerus - Correct answer-*Fracture at the distal
end.
*Common in kids when they fall with hand outstretched.
Damaged median nerve ... - Correct answer-loss of pronation, opposition of the
thumb, and flexion of the lateral two IP joints and impairment of the medial two IP
joints
testicular torsion - Correct answer-In the absence of trauma, lack of cremasteric
reflex along with 10/10 groin pain in an adolescent male. An emergency
The nerve(s) of Cremaster reflex - Correct answer-Genitofemoral nerve (L1-L2)
*The "femoral" portion of this nerve supplies skin sensation to the upper anterior
thigh.
*"Genito" portion of the nerve travels with the spermatic cord to innervate the
cremaster muscle and the anterior scrotal skin.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
