FREE ANATOMY AND STUDY GAMES ABOUT UPPER LIMB

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FREE ANATOMY AND STUDY GAMES ABOUT UPPER LIMB

MUSCLES. EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -104 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: abducts the wrist (hand)

Answer:

Three muscles have this function. Two are served by the radial nerve and one by the median nerve.Two of these muscles also extend the wrist and one of these muscles flexes the wrist. None of them move the digits.

Question 2: inserts on the carpals or digits

Answer:

This describes the generic insertion of the group of ten muscles that move the wrist or the digits.

Question 3: rhomboideus muscles

Answer:

There are two of these muscles and they are grouped with four other muscles that stabilize (moor) the scapula. Origin: C7 to T5 and they insert on the scapula. They are served by the dorsal scapular nerve.They adduct, elevate and rotate the scapula.

Question 4: rotator cuff

Answer:

This is the name of a group of four muscles that move the arm. They all attach very close to the shoulder joint, around the head of the humerus. Therefore the sacrifice power but gain speed. These muscles are often injured in sports activities.

Question 5: inserts on the scapula

Answer:

This is the general description of the insertion for the five muscles that moor or stabilize the scapula.

Question 6: anconeus m.

Answer:

The origin of this muscle is the lateral epicondyle of the humerus. Its insertion is the ulna. It is served by the radial nerve. Its most important action is extension of the forearm so it is a synergyst of the triceps brachii.

Question 7: extends the wrist (hand)

Answer:

Four of the five muscles that we study in the posterior compartment of the forearm that move the wrist or the digits have this action.

Question 8: flexes the forearm

Answer:

Three muscles that we have studied are capable of this action. They are the biceps brachii, brachialis, and bracioradialis.

Question 9: origin on the medial epicondyle of the humerus

Answer:

This is the origin for the following muscles: Flexor Carpi Radialis, Palmaris Longus, Flexor Carpi Ulnaris, and Flexor Digitorium Superficialis.

Question 10: laterally and medially rotates the arm (humerus)

Answer:

The deltoid muscle is the only muscle with this action.

Question 11: origin on the supraglenoid tubercle and coracoid process of the scapula

Answer:

This is the origin for the biceps brachii muscle.

Question 12: origin on the subscapular fossa of scapula

Answer:

This is the origin for the subscapularis muscle.

Question 13: upper and lower subscapular nerves

Answer:

This is the nerve supply for the only rotator cuff muscle that medially rotates the arm.

Question 14: supinator m.

Answer:

This muscle is served by the radial nerve. Its origin is on the lateral epicondyle of the humerus and the ulna. Its insertion is the radius. It has one action in common with the biceps brachii and the brachioradialis muscles.

Question 15: flexes the arm (humerus)

Answer:

Three of the muscles that move the arm have this action. One of them is the coracobrachialis muscle.

Question 16: musculocutaneous nerve

Answer:

This nerve is formed from the lateral cord. It contains nerves from the anterior rami of C5, C6, and C7. It serves the anterior compartment of the arm. It also receives sensory input from the lateral cutaneous area of the forearm.

Question 17: flexor digitorum profundus m.

Answer:

In the anterior compartment of the forearm. The only muscle of this compartment served by two nerves, half by the median nerve and half by the ulnar nerve. Origin: proximal 75% of the ulna. It inserts on the digits and flexes the wrist and the digits.

Question 18: subscapularis m.

Answer:

This muscle is one of the four rotator cuff muscles. Origin: subscapular fossa of the scapula. Insertion: humerus. It is the only medial rotator of the arm that is a rotator cuff muscle. Nerve: upper and lower subscapular nerves.

Question 19: medially rotates the arm (humerus)

Answer:

Five muscles have this action. One is a rotator cuff muscle and the other four muscles that have this action are muscles that move the arm.

Question 20: elevates the scapula

Answer:

Only three muscles of the group known as the muscles of the scapula do this to the scapula.

Question 21: adducts (retracts) the scapula

Answer:

This is an action that only the trapezius muscle and the rhomboid muscles perform.

Question 22: triceps brachii m.

Answer:

Origin: infraglenoid tubercle of the scapula and the shaft of the humerus. It inserts on the ulna, specifically on the olecranon process of ulna. It is served by the radial nerve. It has the same action as the anconeus muscle.

Question 23: mooring the scapula

Answer:

This is the description of general function for 5 muscles. Some authors say they stabilize the scapula.They include trapezius, lavator scapulae ventralis, rhomboids, pectoralis minor, and serratus anterior.

Question 24: brachialis m.

Answer:

This muscle flexes the forearm. It is served by the musculocutaneous nerve. It originates on the anterior surface of the humerus and inserts on the ulna.