Extremities Exam 1
During a fencing match an errant parry with a saber completely transected the Coracobrachialis muscle (in the proximal 1/4th) of the Hungarian champion. This would result in weakness of which upper extremity movement (s)? A. Arm flexion B. Forearm supination C. Elbow flexion D. All of the above
D. All of the above
Which nerve would most likely be injured by a traumatic dislocation of the humeral head? A. Radial B. Musculocutaneous C. Median D. Axillary E. Ulnar
D. Axillary
Which of the following muscles lacks a direct attachment to the humerus? A. Biceps brachii B. Coracobrachialis C. Brachialis D. Anconeus E. Deltoid F. Supraspinatus E. Teres minor
A. Biceps brachii
With the elbow flexed at 90 degrees the majority of supination is performed by the: A. Biceps brachii B. Supinator C. Brachialis D. Pectoralis minor E. Pectoralis major
A. Biceps brachii
The middle trunk of the brachial plexus is formed by anterior rami of which spinal cord segments? A. C7 B. C6 and C7 C. C6 D. C5 and C6 E. C7 and T1
A. C7
A structure found in the deltopectoral groove is the A. Cephalic vein B. Basilica vein C. Radial vein D. Brachial vein E. Musculocutaneous nerve
A. Cephalic Vein
Identify muscles involved in arm extension A. Latissimus dorsi B. Teres major C. Deltoid D. All of the above
A. Latissimus dorsi
The ulnar nerve is a branch of which cord of the brachial plexus? A. Medial B. Lateral C. Posterior D. Anterior
A. Medial
What is the innervation of the Teres minor muscle? Axillary nerve
Axillary nerve
The nerve most likely to be traumatized with a fracture to the surgical neck of the humerus is the? A. Median B. Axillary C. Radial D. Ulnar E. Profunda brachii
B. Axillary
The true statement about the posterior compartment of the arm is: A. It receives its motor supply from the median nerve B. It contains the profunda brachii artery and radial nerve C. It contains a single elbow flexor D. Its major artery is the brachial E. It contains the ulnar nerve in its distal part F. It receives motor supply from lateral cord of brachial plexus
B. It contains the profunda brachii artery and radial nerve
The infraglenoid tubercle serves as an attachment for the: A. Long head of the biceps B. Long head of the triceps C. Coracobrachialis D. Subscapularis
B. Long head of the triceps
The distal attachment (insertion) of the triceps brachii muscle is A. Coronoid process of the ulna B. Olecranon process of the ulna C. Styloid process of the ulna D. Radial notch of the ulna E. Ulnar tuberosity
B. Olecranon process of the ulna
The muscle that forms the bulk of the anterior axillary fold is the: A. Latissimus dorsi B. Pectoralis major C. Subscapularis D. Teres minor E. Teres major
B. Pectoralis major
The medial wall of the axilla is formed by which of the following muscles? A. Teres major B. Serratus anterior C. Pectoralis major D. Subscapularis E. Pectoralis minor
B. Serratus anterior
Which of the following muscles does NOT rotate the arm medially (or internally)? A. Subscapularis B. Supraspinatus C. Latissimus Dorsi D. Pectoralis Major E. Anterior fibers of the Deltoid
B. Supraspinatus
Fracture of the surgical neck of the humerus A. radial nerve B. axillary nerve C. ulnar nerve D. median nerve E. medial brachial cutaneous nerve
B. axillary nerve
Numbness to the skin on the lateral half of the palm of the hand would be caused by a lesion to which nerve? A. ulnar B. radial C. median D. superficial radial E. anterior interosseous
C. median
In this patient, paralysis of the supinator muscle only slightly affects the ability to supinate due to the unimpaired action of the: A. Pronator teres B. Brachioradialis C. Pronator quadratus D. Biceps brachii E. Triceps brachii
D. Biceps brachii
When taking the blood pressure, the stethoscope is usually placed on which artery? A. Ulnar B. Profunda brachi C. Axillary D. Brachial E. Radial
D. Brachial
Which of these muscles is not attached to the coracoid process? A. Biceps brachii B. Coracobrachialis C. Pectoralis minor D. Brachialis
D. Brachialis
All of the following bony landmarks are visible on a skeleton when viewed directly from behind (posterior view), EXCEPT: A. Medial epicondyle B. Greater tubercle C. Spiral groove D. Lesser tubercle E. Olecranon process
D. Lesser tubercle
After a time, when a motor nerve to a muscle is sectioned, the muscles will atrophy (get smaller). If you notice that the thenar muscles are atrophied, which nerve would you suppose has been injured? A. Musculocutaneous B. Ulnar C. Radial D. Median E. Thoracodorsal
D. Median
The uppermost part of the rotator cuff of the shoulder is the tendon of the: A. deltoid B. teres minor C. teres major D. subscapularis E. supraspinatus
E. supraspinatus
Which nerve is probably damaged if a patient cannot abduct the arm beyond 25 degrees? A. Axillary B. Radial C. Musculocutaneous D. Median E. Ulnar
A. Axillary
Loss of pronation of the hand suggests a lesion of the: A. Median nerve B. Radial nerve C. Ulnar nerve D. Intercostobrachial nerve E. Musculocutaneous nerve
A. Median nerve
If a tumor grows in the quadrangular space of the axillary region which structure would be in danger? ** A. Posterior humeral circumflex artery and axillary nerve B. Posterior humeral circumflex artery and radial nerve C. Radial nerve and profunda brachii artery D. Circumflex scapular artery and radial artery E. Axillary artery and posterior humeral circumflex artery
A. Posterior humeral circumflex artery and axillary nerve
What is the most common site for breast cancer? A. Upper outer quadrant B. Upper inner quadrant C. Lower outer quadrant D. Lower inner quadrant
A. Upper outer quadrant
Mid-shaft humeral fracture A. radial nerve B. axillary nerve C. ulnar nerve D. median nerve E. medial brachial cutaneous nerve
A. radial nerve
The initiation of arm abduction requires an intact: A. suprascapular nerve B. axillary nerve C. upper and lower subscapular nerve nerve to the subclavius D. nerve to the subclavius
A. suprascapular nerve
Most of the muscles that act on the shoulder girdle and upper limb joints are supplied by branches of the brachial plexus. hich of the following is not? A. trapezius B. teres minor C. latissimus dorsi D. rhomboid major E. levator scapulae
A. trapezius
The dermatome of the thumb is innervated by various elements arising from which spinal cord segments? A. C5 B. C6 C. C7 D. C8 E. T1
B. C6
The levator scapulae muscle A. Depresses scapula B. Innervated by C3 and C4 cervical nerves C. Inserts on medial scapula angle D. All of the above
B. Innervated by C3 and C4 cervical nerves
The lateral cord of the brachial plexus is: A. Formed by the anterior divisions of the middle and lower trunks of the brachial plexus B. Innervates the anterior compartment muscles of the arm C. Contains nerves from cervical roots 7 and 8 D. All of the above
B. Innervates the anterior compartment muscles of the arm
Which carpal bone articulates with the radius? A. Trapezoid B. Scaphoid C. Hamate D. Capitate
B. Scaphoid
You are to perform a venipuncture of the median cubital vein. hich of the following structures is most suitably located to afford protection against your inadvertently entering the brachial artery rather than the veins? A. the tendon of the biceps brachii muscle B. the bicipital aponeurosis C. the tendon of the brachialis D. the brachioradialis muscle E. the medial epicondyle of the humerus
B. the bicipital aponeurosis
At which location will occlusion of the identified artery result in significant impairment of arterial flow to the distal upper extremity? A. Subclavian artery distal to the thyrocervical trunk B. Proximal profunda brachii artery C. Brachial artery just proximal to the profunda brachii artery D. Brachial artery just proximal to the thoracoacromial trunk (artery)
C. Brachial artery just proximal to the profunda brachii artery
Which muscle functions only to flex the forearm? A. Biceps brachii B. Coracobrachialis C. Brachialis D. All flex the forearm
C. Brachialis
Which muscle may be innervated by the Musculocutaneous nerve and the radial nerve? A. Coracobrachialis B. Biceps brachii C. Brachialis D. Triceps
C. Brachialis
Long thoracic nerve injury is associated with all of the following except? A. Winging of the scapula B. Difficulty with maximum arm extension overhead C. Decreased sensation over lateral thorax D. Difficulty performing a push up (even a girly one with your knees on the ground)
C. Decreased sensation over lateral thorax
Damage to the Coracobrachialis muscle and its nerve supply would weaken which motion of the arm and forearm? A.Extension B. Rotation C. Flexion D. Supination E. Abduction
C. Flexion
Which muscle is innervated by both the ulnar and median nerves? A. Flexor digitorum superficialis B. Pronator quadratus C. Flexor digitorum profundus D. Supinator E. None of the above
C. Flexor digitorum profundus
Two weeks after surgical repair of this injury (fracture of surgical neck of humerus) you should be least surprised to find: A. Decreases brachial pulse B. Impaired forearm extension C. Impaired arm abduction D. Impaired arm flexion
C. Impaired arm abduction
Which of the following muscles is a lateral rotator of the arm? A. Subscapularis B. Latissimus dorsi C. Infraspinatus D. Teres major E. Anterior fibers of the deltoid
C. Infraspinatus
The following statements regarding the rhomboid major muscle are accurate except: A. It originates from the ligamentum nuchae & spinous processes of C7-T1 B. It is innervated by the dorsal scapular nerve C. It draws the scapula laterally D. It inserts on the medial border of the scapula inferior to the scapular spine
C. It draws the scapula laterally
The major function of the rotator cuff muscles is to: A. Assist in shoulder abduction B. Initiate medial rotation of the arm C. Maintain the humeral head in the glenoid fossa D. Prevent lateral rotation
C. Maintain the humeral head in the glenoid fossa
A humeral shaft fracture distal to the formation of the radial groove would result in weakness of: A. Long head of triceps B. Lateral head of triceps C. Medial head of triceps D. All heads of the triceps
C. Medial head of triceps
With an injury to the right upper trunk of the brachial plexus (Erb Duchenne paralysis), the patient's right upper extremity would be: A. Abducted B. Adducted C. Medially rotated D. Laterally rotated E. Flexed
C. Medially rotated
The artery that may be palpated deep in the "anatomical snuff box" is the: superficial ulnar A. Posterior interosseous B. Cephalic C. Radial D. Deep ulnar
C. Radial
The only rotator cuff muscle that does not contribute to rotation of the arm is the: A. Teres minor B. Infraspinatus C. Supraspinatus D. Subscapularis
C. Supraspinatus
All of the following muscles attach to the medial border of the scapula EXCEPT the: A. Levator scapulae B. Rhomboideus major C. Teres major D. Serratus anterior E. Rhomboideus minor
C. Teres major
The nerve most likely to be injured in fractures of the medial epicondyle is the: A. Radial B. Axillary C. Ulnar D. Median E. Musculocutaneous
C. Ulnar
Which nerve-artery pair does not run together? A. Radial nerve and profunda brachii B. Axillary nerve and posterior circumflex artery C. Ulnar artery and inferior ulnar collateral artery D. Ulnar nerve and superior ulnar collateral artery E. Median nerve and brachial artery F. Anterior interosseous nerve and anterior interosseous artery G. Ulnar nerve and profunda brachii artery origin H. Musculocutaneous nerve and brachial artery
C. Ulnar artery and inferior ulnar collateral artery H. Musculocutaneous nerve and brachial artery
On physical exam at the beginning of rehab the most likely physical finding would be? There was a picture of a humerus fracture that was completely healed A. Weakness of all posterior compartment muscles of the upper extremity B. Weakness of lateral head of triceps C. Weakness of anconeus D. Diminished brachial pulse
C. Weakness of anconeus
In the cubital fossa, the median cubital vein is frequently used for venipuncture. This vein is separated from underlying neurovascular structures by the: A. investing fascia of the brachialis muscle B. crural fascia C. bicipital aponeurosis D. anconeus muscle E. tendon of the biceps brachialis muscle
C. bicipital aponeurosis
Increasing muscle mass and tone is the aim of many people who work out at the gym. This is done by contracting the muscle against resistance. If you want to increase the muscle mass of the latissimus dorsi muscle, which of the following actions would you be most likely to perform? A. depression of the scapula B. abduction of the arm C. extension of the arm D. flexion of the arm E. lateral rotation of the arm
C. extension of the arm
If the dorsal rootlets of T4 are cut (dorsal rhizotomy) there will be a loss of sensation at the level of the: A. neck B. clavicle C. nipple D. umbilicus
C. nipple
If you slide a piece of paper between a patients fingers and asked the patient to hold onto the paper when you try to pull it from the fingers, and the patient is unable to perform this action, which nerve is suspected to be nonfunctional? A. radial B. median recurrent C. ulnar D. deep radial E. superficial radial
C. ulnar
All of the following muscles are involved in arm flexion except: A. Biceps brachii B. Deltoid C. Coracobrachialis D. Brachialis
D. Brachialis
A branch of the axillary artery is the: A. Costocervical B. Verterbral C. Dorsal scapular D. Suprascapular E. Subscapular
E. Subscapular
Which of the following nerves sends branches to the muscles of the arm? A. Median B. Ulnar C. Dorsal scapular D. Musculocutaneous E. Long thoracic
D. Musculocutaneous
Damage to the Coracobrachialis muscle would impair which motion of the forearm A. Extension B. Flexion C. Pronation D. None
D. None
The posterior cord of the brachial plexus is formed by A. The anterior divisions of the upper and middle trunks B. Cervical nerve roots C5-C7 C. The anterior divisions of the upper, middle, and lower trunks D. Posterior divisions of the upper, middle, and lower trunks
D. Posterior divisions of the upper, middle, and lower trunks
Which artery accompanies the radial nerve to supply the posterior compartment of the arm? A. Axillary B. Brachial C. Ulnar D. Profunda brachii E. Radial
D. Profunda brachii
A physical sign known as "winged scapula" suggests loss of function to which of the following muscles? A. Rhomboid major B. Levator scapulae C. Latissimus dorsi D. Serratus anterior E. Trapezius
D. Serratus anterior
Which joint serves as the only bony attachment of the superior limb to the axial skeletion? A. Glenohumeral B. Acromioclavicular C. Scapulothoracic D. Sternoclavicular E. Costoclavicular
D. Sternoclavicular
All of the following muscles are arm adductors except: A. Teres major B. Pectoralis major C. Latissimus dorsi D. Supraspinatus
D. Supraspinatus
A 52-year-old man was brought to the emergency room after being found in the park where he had apparently lain overnight after a fall. He complained of severe pain in the left arm. Physical examination suggested a broken humerus, which was confirmed radiologically. The patient was able to extend the forearm at the elbow, but supination appeared somewhat weak; the hand grasp was very weak when compared with the uninjured arm. Neurologic examination revealed an inability to extend the wrist ("wrist drop"). ince these findings pointed to apparent nerve damage, the patient was scheduled for a surgical reduction of the fracture. In this patient, paralysis of the supinator muscle only slightly affects the ability to supinate due to the unimpaired action of the: A. pronator teres B. brachioradialis C. pronator quadratus D. biceps brachii E. triceps brachii
D. biceps brachii
The lateral boundary of the cubital fossa is formed by the: A. flexor carpi radialis muscle B. tendon of the biceps muscle C. brachialis muscle D. brachioradialis muscle E. pronator teres muscle
D. brachioradialis muscle
The clavicle is one of the most fractured bones. In the diagram, the clavicle has been fractured at about the junction of the middle and distal thirds. Notice that the proximal end has been pulled upward. hich of the following muscles is responsible for this? A. anterior deltoid fibers B. trapezius C. subclavius D. sternocleidomastoid E. pectoralis major
D. sternocleidomastoid
The long head of the biceps brachii muscle arises from the A. Infraglenoid tubercle of the scapula B. The acromion process C. The corocoid process D. The supraglenoid tubercle of the scapula
D. the supraglenoid tubercle of the scapula
What is the innervation of the Levator scapulae?
Dorsal scapular nerve
What is the innervation of the Rhomboids?
Dorsal scapular nerve
A 52-year-old man was brought to the emergency room after being found in the park where he had apparently lain overnight after a fall. He complained of severe pain in the left arm. Physical examination suggested a broken humerus, which was confirmed radiologically. The patient was able to extend the forearm at the elbow, but supination appeared somewhat weak; the hand grasp was very weak when compared with the uninjured arm. Neurologic examination revealed an inability to extend the wrist ("wrist drop"). ince these findings pointed to apparent nerve damage, the patient was scheduled for a surgical reduction of the fracture. The observations that extension at the elbow appeared normal, but supination of the forearm weak, warrants localization of the nerve to the: A. posterior division of the brachial plexus B. posterior cord of the brachial plexus in the axilla C. radial nerve at the distal third of the humerus D. radial nerve injury in the vicinity of the head of the radius E. radial nerve in the mid-forearm
E. radial nerve in the mid-forearm
What is the innervation of the Subscapularis
Lower subscapular nerve
What is the innervation of the Teres major muscle?
Lower subscapular nerve
What is the innervation of the Supraspinatus
Suprascapular nerve
What is the innervation of the Latissimus dorsi muscle?
thoracodorsal nerve
Anterior dislocation of the lunate A. radial nerve B. axillary nerve C. ulnar nerve D. median nerve E. medial brachial cutaneous nerve
E. medial brachial cutaneous nerve
The nerve most likely to be injured in fractures of the medial epicondyle is the: A. radial B. axillary C. ulnar D. median E. musculocutaneous
C. ulnar
Bones can fracture or be displaced from their normal anatomical position at any of several locations. Each of these injuries may traumatize a nerve passing close to the bone in question at that location. Match the nerve most likely to be injured with the problem: Fracture of the medial epicondyle of the humerus A. radial nerve B. axillary nerve C. ulnar nerve D. median nerve E. medial brachial cutaneous nerve
C. ulnar nerve
The supraglenoid tubercle serves as an attachment for the: A. Long head of biceps brachii B. Long head of triceps brachii C. Medial head of the triceps D. Coracobrachialis E. Subscapularis F. Short head of the triceps
A. Long head of biceps brachii
At the front of the elbow, which of the following lies superficial to the bicipital aponeurosis? A. Median cubital vein B. Brachial artery C. Median nerve D. Ulnar nerve E. Cephalic vein
A. Median cubital vein
Identify muscles involved in extension A. Medial head of triceps B. Long head of triceps C. Lateral head of triceps D. All of the above
D. All of the above
The pectoralis minor A. Inserts on the coracoid process of the scapula B. Actual function in upper extremity innervation is generally unknown C. Organizes the contents of the axilla D. All of the above
D. All of the above
All of these arteries may contribute to the anastomosis around the scapula EXCEPT the: A. Subscapular B. Transverse cervical C. Suprascapular D. Intercostal E. Lateral thoracic
E. Lateral thoracic
A large muscle that arises from two heads, flexes and medially rotates the arm. It is innervated by nerves arising from different cords of the brachial plexus. This is the: A. Latissimus dorsi B. Trapezius C. Deltoid D. Subscapularis E. Pectoralis major F. Biceps brachii
E. Pectoralis major
Which of the following statements is TRUE for the pectoralis major muscle? A. It arises from the humerus B. It inserts into the bony ribs C. It abducts the arm D. It is innervated by the median nerve E. There is no true statement
E. There is no true statement
