BRS Gross Anatomy Exam Questions With
Correct Answers
If a stab wound lacerated the posterior humeral circumflex artery passing through
| | | | | | | | | | |
|the quadrangular space on the shoulder region, which of the following nerves
| | | | | | | | | | | |
would be injured? | |
A) Radial nerve
| |
B) Axillary nerve
| |
C) Thoracodorsal nerve
| |
D) Suprascapular nerve
| |
E) Accessory nerve - CORRECT ANSWER✔✔-B) The axillary nerve runs posteriorly
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to the humerous, accompanying the posterior humeral circumflex artery through
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the quadrangular space and innervating the teres minor and deltoid muscles
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- none of the other nerves pass through the quadrangular space
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A victim of an automobile absent is unable to abbduct her left arm. This indicated
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damage to which of the following parts of the brachial plexus?
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A) Middle trunk & posterior cord
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B) Middle trunk & lateral cord
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C) Lower trunk & lateral cord
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D) Upper trunk & posterior cord
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E) Lower trunk & medial cord - CORRECT ANSWER✔✔-D) Both upper trunk and
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posterior cord are damaged - abductors of the arm are deltoid (axillary nerve
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from posterior cord) and supraspinatus (suprascapular nerve from upper trunk)
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,- middle and lower trunk give rise to no branches
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- lateral and medial cords supply no abductors of the arm
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In order for an engineer to construct a prosthetic arm, he will need to know that
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which of the following muscles flexes the elbow and is innervated by the radial
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nerve?
A) Flexor digitorum longus
| | |
B) Brachioradialis
|
C) Brachialis
| |
D) Extensor digitorum longus
| | |
E) Biceps brachii - CORRECT ANSWER✔✔-B) Brachioradialis is innervated by radial
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nerve and functions to flex the elbow
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- flexor digitorum longus and extensor digitorum longus don't act in the elbow
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- biceps brachii and brachialis flex the elbow and are innervated by
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musculocutaneous nerve |
A little boy was playing on a playground when he fell and struck his arm against
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the swing set. He ran to the school nurse complaining of which of the following
| | | | | | | | | | | | | | |
conditions as a result of injuring the radial nerve in the groove of the humerus?
| | | | | | | | | | | | | |
A) Numbness over the medial side of the forearm
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B) Inability to oppose the thumb
| | | | |
C) Weakness in pronating the arm
| | | | |
D) Weakness in abducting the arm
| | | | |
F) Inability to extend the hand - CORRECT ANSWER✔✔-F) Radial nerve innervates
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the extensor muscles of the hand - numbness would occur on the posterior
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aspects of the arm and forearm | | | | |
,- skin over the medial side is innervated by medial antebrachial cutaneous nerve
| | | | | | | | | | | |
- inabliity to oppose thumb or weakness in controlled by medial nerve - pronator
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forearm is from opponens pollicis, pronator teres, and pronator quadratus
| | | | | | | | |
- abductors of the arm, deltoid and supraspinatus, are innervated by axillary
| | | | | | | | | | | |
nerve and upper trunk of brachial plexus
| | | | | |
A soccer play falls to the ground and fractures the medial epicondyle of the
| | | | | | | | | | | | | |
humerus. Which of the following symptoms might she present with when seeing
| | | | | | | | | | | |
a physician in the ER?
| | | |
A) Impaired abduction of the hand
| | | | |
B) Carpal tunnel syndrome
| | |
C) Wrist drop| |
D) Thenar atrophy
| |
E) Inability to seat on medial part of the hand - CORRECT ANSWER✔✔-E) this
| | | | | | | | | | | | | |
fracture might injure the ulnar nerve which supplies the skin of the medial side of
| | | | | | | | | | | | | |
|the hand causing no cutaneous sensation and lack of sweating in this area
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- abduction of hand: flexor carpi radialis (median nerve) and extensor carpi
| | | | | | | | | | | |
radialis longus/brevis (radial nerves)
| | |
- carpel tunnel and thenar arrophy result in a lesion of the median nerve whereas
| | | | | | | | | | | | | |
|a wrist drop results from a lesion of the radial nerve
| | | | | | | | | |
After winning a boxing match, a 24-year-old man is unable to abduct his fingers.
| | | | | | | | | | | | | |
Which of the following nerves is injured?
| | | | | |
A) Ulnar nerve
| |
B) Median nerve
| |
C) Radial nerve
| |
, D) Musculocutaneous nerve
| |
E) Axillary nerve - CORRECT ANSWER✔✔-A) Ulnar n innervates dorsal interossei
| | | | | | | | | | |
which are the only abductors of the fingers - little finger is by abductor digiti
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minimi which is innervated by ulner
| | | | |
- thumb is abducted by abductor pollicis brevis/longus which are innervated by
| | | | | | | | | | | |
median and radial n | | |
A women presents with a 6-month history of numbness and tingling of the
| | | | | | | | | | | | |
palmar aspect of her lateral three and 1/2 fingers, loss of pronation, and
| | | | | | | | | | | | |
flattening of the thenar eminence. Injury to which of the following nerves could
| | | | | | | | | | | | |
cause a condition?
| |
A) Axillary nerve
| |
B) Musculocutaneous nerve
| |
C) Median nerve
| |
D) Radial nerve
| |
E) Ulnar nerve - CORRECT ANSWER✔✔-C) median nerve supplies the skin of the
| | | | | | | | | | | | |
palmar aspect of the three and a hald lateral fingers and dorsal side of index,
| | | | | | | | | | | | | | |
middle, and half of ring fingers
| | | | |
A ballet dancer falls to the floor and hurts herself sustaining an injury to the
| | | | | | | | | | | | | | |
thoracodorsal nerve. Which of the following movements would be affected?
| | | | | | | | |
A) Adduction of the scapula
| | | |
B) Elevation of the scapula
| | | |
C) Abduction of the arm
| | | |
D) Extension of the arm
| | | |
Correct Answers
If a stab wound lacerated the posterior humeral circumflex artery passing through
| | | | | | | | | | |
|the quadrangular space on the shoulder region, which of the following nerves
| | | | | | | | | | | |
would be injured? | |
A) Radial nerve
| |
B) Axillary nerve
| |
C) Thoracodorsal nerve
| |
D) Suprascapular nerve
| |
E) Accessory nerve - CORRECT ANSWER✔✔-B) The axillary nerve runs posteriorly
| | | | | | | | | | |
to the humerous, accompanying the posterior humeral circumflex artery through
| | | | | | | | | |
the quadrangular space and innervating the teres minor and deltoid muscles
| | | | | | | | | |
- none of the other nerves pass through the quadrangular space
| | | | | | | | | |
A victim of an automobile absent is unable to abbduct her left arm. This indicated
| | | | | | | | | | | | | |
damage to which of the following parts of the brachial plexus?
| | | | | | | | | | |
A) Middle trunk & posterior cord
| | | | |
B) Middle trunk & lateral cord
| | | | |
C) Lower trunk & lateral cord
| | | | |
D) Upper trunk & posterior cord
| | | | |
E) Lower trunk & medial cord - CORRECT ANSWER✔✔-D) Both upper trunk and
| | | | | | | | | | | | |
posterior cord are damaged - abductors of the arm are deltoid (axillary nerve
| | | | | | | | | | | | |
from posterior cord) and supraspinatus (suprascapular nerve from upper trunk)
| | | | | | | | |
,- middle and lower trunk give rise to no branches
| | | | | | | | |
- lateral and medial cords supply no abductors of the arm
| | | | | | | | | |
In order for an engineer to construct a prosthetic arm, he will need to know that
| | | | | | | | | | | | | | | |
which of the following muscles flexes the elbow and is innervated by the radial
| | | | | | | | | | | | | |
nerve?
A) Flexor digitorum longus
| | |
B) Brachioradialis
|
C) Brachialis
| |
D) Extensor digitorum longus
| | |
E) Biceps brachii - CORRECT ANSWER✔✔-B) Brachioradialis is innervated by radial
| | | | | | | | | |
nerve and functions to flex the elbow
| | | | | | |
- flexor digitorum longus and extensor digitorum longus don't act in the elbow
| | | | | | | | | | | |
- biceps brachii and brachialis flex the elbow and are innervated by
| | | | | | | | | | | |
musculocutaneous nerve |
A little boy was playing on a playground when he fell and struck his arm against
| | | | | | | | | | | | | | | |
the swing set. He ran to the school nurse complaining of which of the following
| | | | | | | | | | | | | | |
conditions as a result of injuring the radial nerve in the groove of the humerus?
| | | | | | | | | | | | | |
A) Numbness over the medial side of the forearm
| | | | | | | |
B) Inability to oppose the thumb
| | | | |
C) Weakness in pronating the arm
| | | | |
D) Weakness in abducting the arm
| | | | |
F) Inability to extend the hand - CORRECT ANSWER✔✔-F) Radial nerve innervates
| | | | | | | | | | |
the extensor muscles of the hand - numbness would occur on the posterior
| | | | | | | | | | | | | |
aspects of the arm and forearm | | | | |
,- skin over the medial side is innervated by medial antebrachial cutaneous nerve
| | | | | | | | | | | |
- inabliity to oppose thumb or weakness in controlled by medial nerve - pronator
| | | | | | | | | | | | | |
forearm is from opponens pollicis, pronator teres, and pronator quadratus
| | | | | | | | |
- abductors of the arm, deltoid and supraspinatus, are innervated by axillary
| | | | | | | | | | | |
nerve and upper trunk of brachial plexus
| | | | | |
A soccer play falls to the ground and fractures the medial epicondyle of the
| | | | | | | | | | | | | |
humerus. Which of the following symptoms might she present with when seeing
| | | | | | | | | | | |
a physician in the ER?
| | | |
A) Impaired abduction of the hand
| | | | |
B) Carpal tunnel syndrome
| | |
C) Wrist drop| |
D) Thenar atrophy
| |
E) Inability to seat on medial part of the hand - CORRECT ANSWER✔✔-E) this
| | | | | | | | | | | | | |
fracture might injure the ulnar nerve which supplies the skin of the medial side of
| | | | | | | | | | | | | |
|the hand causing no cutaneous sensation and lack of sweating in this area
| | | | | | | | | | | | |
- abduction of hand: flexor carpi radialis (median nerve) and extensor carpi
| | | | | | | | | | | |
radialis longus/brevis (radial nerves)
| | |
- carpel tunnel and thenar arrophy result in a lesion of the median nerve whereas
| | | | | | | | | | | | | |
|a wrist drop results from a lesion of the radial nerve
| | | | | | | | | |
After winning a boxing match, a 24-year-old man is unable to abduct his fingers.
| | | | | | | | | | | | | |
Which of the following nerves is injured?
| | | | | |
A) Ulnar nerve
| |
B) Median nerve
| |
C) Radial nerve
| |
, D) Musculocutaneous nerve
| |
E) Axillary nerve - CORRECT ANSWER✔✔-A) Ulnar n innervates dorsal interossei
| | | | | | | | | | |
which are the only abductors of the fingers - little finger is by abductor digiti
| | | | | | | | | | | | | | |
minimi which is innervated by ulner
| | | | |
- thumb is abducted by abductor pollicis brevis/longus which are innervated by
| | | | | | | | | | | |
median and radial n | | |
A women presents with a 6-month history of numbness and tingling of the
| | | | | | | | | | | | |
palmar aspect of her lateral three and 1/2 fingers, loss of pronation, and
| | | | | | | | | | | | |
flattening of the thenar eminence. Injury to which of the following nerves could
| | | | | | | | | | | | |
cause a condition?
| |
A) Axillary nerve
| |
B) Musculocutaneous nerve
| |
C) Median nerve
| |
D) Radial nerve
| |
E) Ulnar nerve - CORRECT ANSWER✔✔-C) median nerve supplies the skin of the
| | | | | | | | | | | | |
palmar aspect of the three and a hald lateral fingers and dorsal side of index,
| | | | | | | | | | | | | | |
middle, and half of ring fingers
| | | | |
A ballet dancer falls to the floor and hurts herself sustaining an injury to the
| | | | | | | | | | | | | | |
thoracodorsal nerve. Which of the following movements would be affected?
| | | | | | | | |
A) Adduction of the scapula
| | | |
B) Elevation of the scapula
| | | |
C) Abduction of the arm
| | | |
D) Extension of the arm
| | | |
