Anterior Muscles of Forearm Flashcards
What is the origin of the pronator teres?
Ulnar head originates on the coronoid process of the ulna
Humeral originates on the medial epicondyle of the humerus
Where does the pronator teres insert?
Middle convexity of lateral surface of radius
What is the innervation of the pronator teres?
Median nerve (C6, C7)
What action does the pronator teres perform?
Pronates and flexes the forearm
What is the origin of the flexor carpi radialis?
Medial epicondyle of humerus
Where does the flexor carpi radialis insert?
Base of 2nd or 3rd metacarpal
What is the innervation of the flexor carpi radialis?
Median nerve (C6, C7)
What action does the flexor carpi radialis perform?
Flexes and abducts hand at wrist
What is the origin of the palmaris longus?
Medial epicondyle of humerus
Where does the palmaris longus insert?
Distal half of flexor retinaculum, palmar aponeurosis
What is the innervation of the palmaris longus?
Median nerve (C7, C8)
What action does the palmaris longus perform?
Flexes hand and tenses palmar aponeurosis
What is the origin of the flexor carpi ulnaris?
Olecranon and posterior border of ulna via aponeurosis
Where does the flexor carpi ulnaris insert?
Pisiform, hook of hamate, 5th metacarpal
What is the innervation of the flexor carpi ulnaris?
Ulnar nerve (C7, C8)
What is the origin of the flexor digitorum superficialis?
Humero-ulnar head originates on the medial epicondyle of humerus and coronoid process of ulna
Radial head originates on oblique line of radius
Where does the flexor digitorum superficialis insert?
Bodies of middle phalanges of medial four digits
What is the innervation of the flexor digitorum superficialis?
Median nerve (C7, C8, T1)
What action does the flexor digitorum superficialis perform?
Flexes wrist joint and flexes proximal interphalangeal joints of middle four digits; more strongly flexes proximal phalanges at metacarpophalangeal joints
What is the origin of the flexor digitorum profundus?
Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane
Where does the flexor digitorum profundus insert?
Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
What is the innervation of the flexor digitorum profundus?
Lateral part, to digits 2 and 3, is innervated by the median nerve (C8, T1)
Medial part, to digits 4 and 5, is innervated by the ulnar nerve (C8, T1)
What action does the flexor digitorum profundus perform?
Flexes wrist joint and flexes distal interphalangeal joints of digits 2, 3, 4, and 5
What is the origin of the flexor pollicis longs?
Anterior surface of radius and adjacent interosseous membrane
Where does the flexor pollicis longus insert?
Base of distal phalanx of thumb
What is the innervation of the flexor pollicis longs?
Anterior interosseous nerve from median nerve (C8, T1)
What action does the flexor pollicis longus perform?
Flexes wrists and metacarpophalangeal and interphalangeal joints of thumb
What is the origin of the pronator quadratus?
Distal quarter of anterior surface of ulna
Where does the pronator quadratus insert?
Distal quarter of anterior surface of radius
What is the innervation of the pronator quadratus?
Anterior interosseous nerve from median nerve (C8, T1)
What action does the pronator quadratus perform?
Pronates forearm along with deep fibers binding radius and ulna together
What action does the flexor carpi ulnaris perform?
Flexes and adducts hand at wrist
What four muscles make up the superficial group of anterior forearm muscles?
Pronator teres, flexor carpi ulnaris, palmaris longus, and flexor carpi radialis
What muscle makes up the intermediate group of anterior forearm muscles?
Flexor digitorum superficialis
What muscles make up the deep group of anterior forearm muscles?
Flexor digitorum profundus, flexor pollicis longus, and pronator quadratus
