Forearm and Hand Part 2 Flashcards
Flexor Carpi Radius Action
Flex the wrist
Abduct the wrist
May assist to flex the elbow
Flexor Carpi Radialis Origin
Common flexor tendon from medial epicondyle of the humerus
Flexor Carpi Radialis Insertion
Base of the second and third metacarpal
Palmaris Longus Action
Tense the palmar fascia
Flex the wrist
May assist to flex the elbow
Palmaris Longus Origin
Common flexor tendon from medial epicondyle of the humerus
Palmaris Longus Insertion
Flexor retinaculum and palmar aponeurosis
Flexor Carpi Ulnaris Action
Flex the wrist
Adduct the wrist
Assist to flex the elbow
Flexor Carpi Ulnaris Origin: Humeral and Ulnar head
Humeral head:
Common flexor tendon from medial epicondyle of the humerus
Ulnar head:
Posterior surface of proximal two thirds of the ulna
Flexor Carpi Ulnaris Insertion
Pisiform, hook of the hamate and base of the fifth metacarpal
Flexor Digitorum Superficialis Action
Flex the second through fifth fingers
Flex the wrist
Flexor Digitorum Superficialis Origin
Common flexor tendon from the medial epicondyle of humerus, ulnar collateral ligament, coronoid process of the ulna, interosseous membrane, and proximal shaft of the radius
Flexor Digitorum Superficialis Insertion
Sides of middle phalanges of second through fifth finger
Flexor Digitorum Profundus Action
Flex the second through fifth fingers
Flexor Digitorum Profundus Origin
Anterior and medial surface of the proximal three quarters of the ulna
Flexor Digitorum Profundus Insertion
Bases of distal phalanges, palmar surface of second through fifth fingers
Pronator Teres Action
Pronate the forearm
Assist to flex the elbow
Pronator Teres Origin
Common flexor tendon from medial epicondyle of the humerus and coronoid process of the ulna
Pronator Teres Insertion
Middle of lateral surface of the radius
Pronator Quadratus Action
Pronate the forearm
Pronator Quadratus Origin
Medial, anterior surface of the distal ulna
Pronator Quadratus Insertion
Lateral, anterior surface of distal radius
Supinator Action
Supinate the forearm
Supinator Origin
Lateral epicondyle of the humerus, radial collateral ligament, annular ligament and supinator crest of the ulna
Supinator Insertion
Anterior, lateral surface of proximal one third of the radial shaft
Which muscle is absent in 11% of the population?
Palmaris longus
Which muscle is always present even in the absence of others?
Palmar aponeurosis
Which muscles may be doubled?
Palmaris longus (also different insertions)
Which motion is primary, supination or pronation?
Supination from bicep strenght
