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BRS: Gross Anatomy Questions with
100% Correct Answers | for Specific
Exam Mail
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
Ans: 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
:
vPretest - Stuvia US
,2
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
Ans: 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
:
vPretest - Stuvia US
,3
C) Brachialis
D) Extensor digitorum longus
E) Biceps brachii
Ans: 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
:
vPretest - Stuvia US
, 4
Ans: 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
:
vPretest - Stuvia US
BRS: Gross Anatomy Questions with
100% Correct Answers | for Specific
Exam Mail
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
Ans: 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
:
vPretest - Stuvia US
,2
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
Ans: 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
:
vPretest - Stuvia US
,3
C) Brachialis
D) Extensor digitorum longus
E) Biceps brachii
Ans: 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
:
vPretest - Stuvia US
, 4
Ans: 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
:
vPretest - Stuvia US
