Muscles of anterior compartment of forearm Flashcards
What is the proximal attachment of the pronator teres?
Ulnar head: coronoid process
Humeral head: Medial epicondyle of humerus
What is the distal attachment of the pronator teres?
Middle of convexity of lateral surface of radius
What nerve innervates the pronator teres?
Median nerve (C6,C7)
What is the muscle action of the pronator teres?
Pronates and flexes forearm at elbow
What is the proximal attachment of the flexor carpi radialis?
Medial epicondyle of humerus
What is the distal attachment of the flexor carpi radialis?
Base of second metacarpal
What nerve innervates the flexor carpi radialis?
Median nerve (C6,C7)
What is the muscle action of the flexor carpi radialis?
Flexes and abducts hand (at wrist)
What is the proximal attachment of the palmaris longus?
Medial epicondyle of humerus
What is the distal attachment of the palmaris longus?
Distal half of flexor retinaculum and apex of palmar aponeurosis
What nerve innervates the palmaris longus?
Median nerve (C7,C8)
What is the muscle action of the palmaris longus?
Flexes hand (at wrist) and tenses palmar aponeuosis
What is the proximal attachment of the flexor carpi ulnaris?
Humeral head: medial epicondyle of humerus
Ulnar head: Olecranon and posterior border of ulna
What is distal attachment of the flexor carpi ulnaris?
Pisiform, hook of hamate, 5th metacarpal
What nerve innervates the flexor carpi ulnaris muscle?
Ulnar nerve (C7,C8)
What is the muscle action of the flexor carpi ulnaris?
Flexes and adducts hand (at wrist)
What is the proximal attachment of the flexor digitorum superficialis?
Humero-ulnar head: medial epicondyle
Radial head: superior half of anterior border
What is the distal attachment of the flexor digitorum superficialis?
Shafts of middle phalanges of medial four digits
What nerve innervates the flexor digitorum superficialis muscle?
Median nerve (C7,C8,T1)
What is the muscle action of the flexor digitorum superficialis?
Flexes middle phalanges at proximal interphalangeal joints, and flexes proximal phalanges at metacarpophalangeal joints
What is the proximal attachment of the flexor digitorum profundus?
Medial and lateral part: meidal and anterior surfaces of ulna and interosseous membrane
What is the distal attachment of the flexor digitorum profundus?
Medial part: bases of distal phalanges of 4th and 5th digits
lateral part: bases of distal phalanges of 2nd and 3rd digits
What is the muscle action of the flexor digitorum profundus?
Medial part: flexes distal phalanges 4 and 5 at distal interphalageal joints
Lateral parts: flexes distal phalanges 2 and 3 at distal interphalangeal joints
What is the proximal attachment of the flexor pollicis longus?
Anterior surface of radius and adjacent interosseous membrane
What is the distal attachment of the flexor pollicis longus?
Base of distal phalanx of thumb
What nerve innervates the flexor pollicis longus, pronator quadratus, and the flexor digitorum profundus?
Anterior interosseous nerve, from median nerve (C8,T1)
What is the muscle action of the flexor pollicis longus?
Flexes phalanges of 1st digit (thumb)
What is the proximal attachment of the pronator quadratus?
Distal quarter of anterior surface of ulna
What is the distal attachmnet of the pronator quadratus?
Distal quarter of anterior surface of radius
What is the muscle action of the pronator quadratus?
Pronates forearm; deep fibers bind radius and ulna together
