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Select the one best response to each question!
Which of the following is NOT a supraclavicular branch of the brachial plexus?
The dorsal scapular nerve, long thoracic nerve, nerve to the subclavius, and suprascapular nerve are supraclavicular branches of the brachial plexus, whereas the lateral pectoral nerve is an infraclavicular branch, originating from the lateral cord
|16. Which of the following is an extrinsic shoulder muscle?
(B) teres major
(C) levator scapulae
(D) teres minor
|17. Which of the following is true in respect to the trapezius?
(A) It is innervated by the dorsal scapular nerve.
(B) Its superior fibers retract the scapula.
(C) Its middle fibers elevate the scapula.
(D) Its inferior fibers retract the scapula.
(E) Its superior and inferior fibers act together in rotating the scapula on the thoracic wall.
|18. A patient is asked to place the hands posteriorly on the hips and to push the elbows posteriorly against resistance. Which muscle is being tested?
(A) levator scapulae
(D) latissimus dorsi
(E) serratus anterior
|19. Which rotator cuff muscle does NOT rotate the humerus?
(C) teres minor
(E) teres major
|20. The axillary nerve innervates which of the following muscles?
(B) teres minor(C) teres major
(E) levator scapulae
|21. Which of the following is NOT contained in the axilla?
(A) axillary blood vessels
(B) lymph nodes
(C) trunks and divisions of the brachial plexus
(D) axillary nerve
(E) lymph nodes
|22. Which of the following is most correct?
(A) The subscapular artery arises from the third part of the axillary artery and contributes to blood supply of muscles near the scapula and humerus.
(B) The second part of the axillary artery typically contains two branches—the thoracoacromial artery and the superior thoracic artery.
(C) The first part of the axillary artery lies posterior to the pectoralis minor.
(D) The thoracoacromial artery supplies the pectoral muscles, axillary lymph nodes, and most importantly the lateral part of the mammary gland in women.
(E) The lateral thoracic artery divides into four branches, the acromial, deltoid, pectoral, and clavicular.
|23. Which of the following is NOT correct?
(A) The brachial plexus is formed by the union of the ventral rami of C5 through T1.
(B) The roots of the brachial plexus and the subclavian artery pass through the gap between the anterior and middle scalene muscles.
(C) Gray rami contribute sympathetic fibers to each root.
(D) Each of the three trunks of the brachial plexus divide into anterior and posterior divisions.
(E) The cords of the brachial plexus surround the brachial artery.
|24. Which of the following is NOT a supraclavicular branch of the brachial plexus?
(A) dorsal scapular nerve
(B) lateral pectoral nerve
(C) long thoracic nerve
(D) nerve to the subclavius
(E) suprascapular nerve
|25. Which of the following is true regarding the quadrangular space?
(A) It is bounded superiorly by the teres major.
(B) It is bounded inferiorly by the subscapularis and teres minor.
(C) It is bounded medially by the humerus and laterally by the long head of the triceps.
(D) It contains the posterior circumflex humeral artery and the axillary nerve.
(E) Brachial plexus herniations occur here
|26. Which of the following is NOT innervated by the suprascapular nerve?
(C) glenohumeral joint
(D) skin over superior part of scapula
(E) shoulder joint
|27. Which of the following is NOT a branch of the posterior cord of the brachial plexus?
(A) upper and lower subscapular nerves
(B) thoracodorsal nerve
(C) axillary nerve
(D) radial nerve
(E) long thoracic nerve
|28. Which of the following is NOT true in respect to the brachialis?
(A) Its origin is the distal half of the anterior surface of the humerus.
(B) Its insertion is the coronoid process and tuberosity of the ulna.
(C) It flexes the forearm in all positions.(D) It is primarily innervated by the musculocutaneous nerve, but some of its lateral part is innervated by a branch of the radial nerve.
(E) It crosses two joints.
|29. A patient is asked to abduct the arm 90 degrees and then to extend the flexed forearm against resistance. Which muscle is being tested?
(A) triceps brachii
(D) biceps brachii
|30. The deep artery of the arm accompanies which of the following before passing around the body of the humerus?
(A) radial nerve
(B) musculocutaneous nerve
(C) median nerve
(D) ulnar nerve
(E) axillary nerve