Module 4

Which of the following nerve and artery pairs form neurovascular bundles to supply muscles of the arm and shoulder? -Axillary nerve and circumflex scapular artery -Dorsal scapular nerve and superficial branch of transverse cervical artery -Posterior circumflex humeral artery and radial nerve -Suprascapular nerve and supraspinatus artery -Accessory nerve (XI) and profunda brachii artery

Dorsal scapular nerve and superficial branch of transverse cervical artery

Which of the following muscles is/are not involved in flexion of the arm at the shoulder joint? -Short head of biceps brachii -Clavicular part of deltoid -Coracobrachiolis -Latissimus dorsi

Latissimus dorsi

Which muscle(s) act(s) to protract the scapula? -Serratus anterior -Rhomboid major and minor -Levator scapulae -Trapezius -Pectoralis minor

Serratus anterior

Which of the following statements is false? -The long thoracic nerve innervates the serratus anterior, which acts to protract the scapula. -The medial pectoral nerve innervates the pectoralis minor, which acts to depress the scapula. -The dorsal scapular nerve innervates the levator scapulae and rhomboid major and minor. -The accessory nerve innervates the trapezius, which contributes to medial rotation of the scapula (in adduction). -The accessory nerve innervates the trapezius, which elevates and depresses the scapula and contributes to lateral rotation.

The accessory nerve innervates the trapezius, which contributes to medial rotation of the scapula (in adduction).

Which of the following is correct? -The suprascapular nerve and artery course the triangular space. -The profunda brachii artery courses with the axillary nerve in the quadrangular space. -The axillary nerve courses the triangular space with the posterior circumflex humeral artery. -The axillary nerve and posterior circumflex humeral artery course the quandrangular space. -The posterior circumflex artery courses with the radial nerve in the quadrangular space.

The axillary nerve and posterior circumflex humeral artery course the quandrangular space.

Which of the following is correct? -The scapula articulates with the sternum at the manubrium. -The clavicle articulates with the manubrium of the sternum. -The glenohumeral joint is a gliding joint. -The clavicle articulates with the humerus. -The head of the radius articulates with the glenoid fossa.

The clavicle articulates with the manubrium of the sternum.

Which of the following is correct? -The teres major abducts the arm at the shoulder for the first 15 degrees. -The latissimus dorsi abducts the arm at the shoulder for the first 15 degrees. -The supraspinatus abducts the arm at the shoulder from 15 to 180 degrees. -The deltoid middle fibers abduct the arm at the shoulder from 15 to 180 degrees. -The deltoid middle fibers abduct the arm at the shoulder for the first 15 degrees.

The deltoid middle fibers abduct the arm at the shoulder from 15 to 180 degrees.

Which of the following is correct? -The rotator cuff muscle act to destabilize the glenohumeral joint (shoulder joint). -The four rotator cuff muscles are the supraspinatus, infraspinatus, teres minor, and subscapularis. -The four rotator cuff muscles are the supraspinatus, infraspinatus, rhomboid major, and rhomboid minor. -Three rotator cuff muscle tendons converge to form the rotator cuff tendon. -Rotator cuff muscles arise from the scapula and connect to the head of the radius.

The four rotator cuff muscles are the supraspinatus, infraspinatus, teres minor, and subscapularis.

Which of the following is false regarding the glenohumeral joint? -The glenohumeral joint is an articulation between the scapula's glenoid cavity and the head of the humerus. -Glenohumeral joint sacrifices security for range of motion. -The glenohumeral joint sacrifices range of motion for security of the shoulder joint. -The glenohumeral joint is a ball and socket joint. -The glenohumeral joint is the most mobile joint of the human body.

The glenohumeral joint sacrifices range of motion for security of the shoulder joint.

Which of the following is true regarding the axillary artery? -The superior thoracic artery is a branch of the axillary artery distal to the pectoralis major. -The thoraco-acromial is a branch of the axillary artery proximal to the pectoralis major. -The superior thoracic artery is a branch of the axillary artery deep to the pectoralis major. -The axillary artery is called the brachial artery proximally and the subclavian artery distally. -The lateral thoracic artery is a branch of the axillary artery deep to the pectoralis major

The lateral thoracic artery is a branch of the axillary artery deep to the pectoralis major

Which of the following is false regarding the pectoral girdle? -The pectoral girdle can be protracted or retracted. -The pectoral girdle can be moved horizontally along lateral chest wall. -All pectoral girdle movements occur at the sternoclavicular joint. -The pectoral girdle can be laterally or medially rotated when arm is abducted or adducted. -The pectoral girdle can be elevated but not depressed.

The pectoral girdle can be elevated but not depressed.

Which of the following is correct? -The pectoralis minor and inferior fibers of the trapezius act to elevate the scapula. -The serratus anterior is involved in retraction of the scapula. -The dorsal scapular nerve innervates the serratus anterior, causing lateral rotation of the scapula. -The rhomboid major and minor act to medially rotate and retract the scapula. -The trapezius and levator scapulae depress the scapula.

The rhomboid major and minor act to medially rotate and retract the scapula.

Which of the following statements regarding the upper limb blood supply is false? -The subclavian artery arises from the aortic arch on the left. -The subclavian artery becomes the axillary artery at the lower border of the first rib. -The subclavian artery arises from the brachiocephalic artery on the right. -The subclavian artery arises from the brachiocephalic artery on the left. -The axillary artery becomes the brachial artery at the lower border of the teres major tendon.

The subclavian artery arises from the brachiocephalic artery on the left.

Which of the following is correct? -A blocked axillary artery deep to the pectoralis minor can result in collateral circulation development between the two branches of the thyrocercival trunk and the profunda brachii artery. -The radial and ulnar arteries provide collateral circulation to the hand and digits through a single palmar arch. -The brachial artery divides into the radial artery and ulnar artery in the carpal tunnel. -The superficial and deep palmar arches provide collatreal circulation to the hand and digits. -The axillary artery becomes the subclavian artery distal to the teres major tendon.

The superficial and deep palmar arches provide collatreal circulation to the hand and digits.

Which of the following muscles is not involved in extension of the arm at the shoulder joint? -Latissmus dorsi -Posterior fibers of deltoid -Long head of triceps -Trapezius -Teres major

Trapezius