practice exam 3

What values below correctly represent the number of paired cranial and spinal nerves? 10/30 11/32 12/31 13/34

12/31

Branches off of which of the following spinal nerve roots contribute to the long thoracic nerve? C5 C6 C7 C8 T1

C5 C6 C7

The conus medularis would most likely be found at which spinal level?

L1-L2

Which is one of the terminal branches of the posterior cord of the brachial plexus?

axillary

In a rock-climbing accident an enthusiast of the sport barely manages to avert a major fall by catching himself by one arm and swinging himself onto a nearby ledge several feet below. In the process he lands awkwardly on his right shoulder. Subsequently he has difficult abducting his arm beyond 15 degrees and has lost sensation over his lateral upper arm. What structure has he injured?

axillary nerve

Which of the following explain why it is typically easier to do a chin-up (hands supinated) than a pull-up (hands pronated)? Because the brachialis is a less effective elbow flexor in the pronated position. Because the biceps is a less effective elbow flexor in the pronated position. Because the brachioradialis is a less effective elbow flexor in the pronated position. Because the forearm flexors better assist with elbow flexion in the supinated position.

because the biceps is less effective elbow flexor in the pronated position

Upon arriving at college you soon realized that you needed some "date" money and decided to donate plasma. Your first visit didn't go well because the phlebotomist in training punctured your bicipital aponeurosis and hit a deep blood vessel! Which of the following blood vessels did he likely puncture? brachial artery cubital artery basilic vein cephalic vein median cubital vein

brachial artery

Which of the following bones would likely NOT be fully ossified in a 20 year old male? parietal bone scapula distal humerus clavicle

clavicle

What structure encloses the subclavius and pectoralis minor muscles and is continuous inferiorly with the axillary fascia?

clavipectoral fascia

where does teres major insert

crest of lesser tubercle of humerus

T/F You examine a patient who recently began riding his bike to and from work. He complains of sensory loss on the medial side of his hands and you find some weakness in his intrinsic hand muscles, but not in any other muscle group. You suspect that his riding position has caused inflammation and compression of the median nerve in the carpal tunnel.

false

The distal termination of pia mater associated with the spinal cord is the

filum terminal

Which muscle below has the most distal insertion Brachioradialis Flexor digitorum superficialis Flexor pollicus brevis Flexor digitorum profundus

flexor digitorum profundus

You are at a soccer game (which means you must really be hurting for entertainment) when you see an offensive player flop on the ground and get injured by catching himself on his outstretched hand. Because you are taking anatomy and practically a doctor you decide to evaluate his injury. Upon observation you notice an abnormal bump on the posterior side of his arm just proximal to his wrist. That would most strongly indicate

fractured distal radius (colle's fracture)

Tennis elbow is a tendonitis that is often caused by repetitive elbow and wrist extension. Which of the following structures would be associated with tennis elbow? Inflammation at the lateral eipicondyle of the humerus. Inflammation at the medial epicondyle of the humerus. Inflammation of the annular ligament. Olecranon bursitis.

inflammation at the lateral epicondyle of the humerus

If the right splenius cervicis and capitis were to contract the most likely action would be

ipsilateral lateral flexion of the head and neck

What values below correctly represent the number of paired cranial and spinal nerves? 10/30 11/32 12/31 13/34

ligamentum flavin

A woman was diagnosed with breast cancer and had a radical bilateral mastectomy. Several weeks after surgery she was still unable to abduct her arm above 120 degrees. Which structure do you believe was likely injured in surgery?

long thoracic nerve

A young child is brought to your office for evaluation of an elbow injury. The parents cannot describe the mechanism of injury, as they did not observe what had happened. You observe that the child is holding the injured arm close to the body with the elbow flexed to 90 degrees. They are hesitant to move that arm at all. There is no swelling or evidence of overt trauma to the elbow region. You determine that there is no need for an x-ray, and decide to treat the injury. What is your likely diagnosis?

nursemaid's elbow

When a person falls onto an outstretched hand and experiences wrist pain which of the following is often true? They experience pain in the anatomical snuff box. They fracture the scaphoid. They are diagnosed with a sprained wrist. X-Ray evaluation does not reveal a fracture. They fracture the clavicle only four are true All are true

only four are true

Which of the following muscles is responsible for adduction of the digits?

palmar interossei

Which anatomical structure is used to divide the axillary artery into parts?

pectoralis minor

Which muscle originates from the 3rd to the 5th rib and inserts on the coracoid process of the scapula?

pectoralis minor

The extensors of the forearm are innervated by

radial nerve

The long thoracic nerve innervates which of the following muscles?

serratus anterior

Which of the rotator cuff muscles rotates the humerus medially?

subscapularis

Which of the following arteries is a branch that comes off the first segment of the axillary artery and supplies the serratus anterior?

superior thoracic artery

You have a patient with shoulder pain that is worst when initiating abduction of the arm. It is also painful between 30-60 degrees of abduction and then decreases as the arm is abducted further. Which muscle is most likely injured?

supraspinatus

In which regions of the spinal cord would you expect to find distinct lateral horns?

thoracic

Which nerve supplies sensation on both the anterior and posterior side of the hand that includes all of the 5th finger and the medial side of the 4th finger?

ulnar

The "claw hand" deformity (ability to only close the index and middle finger when making a fist) is due to damage to which structure?

ulnar nerve

The flexor carpi ulnaris is innervated by the

ulnar nerve