Muscles Flashcards
What is the primary action of the biceps brachii?
Flexion of the elbow and supination of the forearm.
Which nerve supplies the triceps brachii?
Radial nerve.
True or False: The deltoid muscle is responsible for shoulder abduction.
True.
Fill in the blank: The __________ nerve innervates the flexor muscles of the forearm.
Median.
What is the main function of the rotator cuff muscles?
Stabilization of the shoulder joint.
Which muscle is primarily responsible for shoulder adduction?
Pectoralis major.
What is the nerve supply to the serratus anterior?
Long thoracic nerve.
True or False: The flexor carpi radialis is responsible for wrist extension.
False.
What action is performed by the extensor digitorum?
Extension of the fingers.
Which muscle is innervated by the ulnar nerve?
Flexor carpi ulnaris.
What is the primary action of the supraspinatus muscle?
Abduction of the arm.
Fill in the blank: The __________ nerve innervates the majority of the hand muscles.
Ulnar.
Which muscle assists in the upward rotation of the scapula?
Trapezius.
What is the function of the pectoralis minor?
Stabilizes the scapula by drawing it anteriorly and inferiorly.
True or False: The brachialis muscle is innervated by the median nerve.
False.
What muscle is responsible for the opposition of the thumb?
Opponens pollicis.
Which nerve is responsible for the innervation of the anterior compartment of the arm?
Musculocutaneous nerve.
What is the primary action of the anconeus muscle?
Assists in elbow extension.
Fill in the blank: The __________ muscle is involved in wrist flexion and is innervated by the median nerve.
Flexor carpi radialis.
Which muscle forms the bulk of the shoulder’s rotator cuff?
Subscapularis.
What is the primary action of the latissimus dorsi?
Extension, adduction, and internal rotation of the shoulder.
True or False: The radial nerve innervates the muscles in the anterior compartment of the forearm.
False.
What is the role of the flexor digitorum superficialis?
Flexion of the proximal interphalangeal joints.
Which muscle is primarily responsible for pronation of the forearm?
Pronator teres.
Fill in the blank: The __________ nerve supplies the muscles of the posterior forearm.
Radial.
What is the primary action of the flexor pollicis longus?
Flexion of the thumb.
Which muscle is responsible for wrist extension?
Extensor carpi radialis longus.
True or False: The coracobrachialis is responsible for shoulder flexion and adduction.
True.
What is the nerve supply to the intrinsic muscles of the hand?
Ulnar and median nerves.
What action is performed by the teres major?
Internal rotation, adduction, and extension of the shoulder.
Fill in the blank: The __________ nerve innervates the flexor digitorum profundus (lateral half).
Median.
What is the main action of the brachioradialis?
Flexion of the elbow.
Which muscle is primarily involved in the extension of the wrist?
Extensor carpi ulnaris.
True or False: The palmaris longus is absent in approximately 14% of the population.
True.
What is the primary action of the rhomboids?
Retraction of the scapula.
Fill in the blank: The __________ nerve is responsible for innervating the teres minor.
Axillary.
What is the primary action of the extensor pollicis longus?
Extension of the thumb at the interphalangeal joint.
Which muscle is involved in finger abduction?
Dorsal interossei.
True or False: The opponens digiti minimi is responsible for the opposition of the little finger.
True.
What is the primary action of the flexor digitorum profundus?
Flexion of the distal interphalangeal joints.
Fill in the blank: The __________ nerve innervates the abductor pollicis brevis.
Median.
