Muscles of the Forearm Flashcards
PRONATOR TERES (Origin)
Medial epicondyle
Coronaid process of Ulna
PRONATOR TERES (Insertion)
Lateral aspect of shaft of Radius
PRONATOR TERES (Action)
Pronation (radius over ulna)
PRONATOR TERES (Innervation)
Median Nerve
FLEXOR CARPI RADIALIS (Origin)
Medial epicondyle
FLEXOR CARPI RADIALIS (Insertion)
Base of 2nd and 3rd metacarpals
FLEXOR CARPI RADIALIS (Action)
Flexion of wrist joint
Abduction of wrist joint
FLEXOR CARPl RADIALIS (Innervation)
Median Nerve
PALMARIS LONGUS (Origin)
Medial epicondyle
PALMARIS LONGUS (Insertion)
Palmar aponeurosis
Distal half of Flexor Retinaculum
PALMARIS LONGUS (Action)
Tenses palmar aponeurosis
Flexes wrist
PALMARIS LONGUS (Innervation)
Median Nerve
FLEXOR CARPI ULNARIS (Origin)
Medial epicondyle
Posterior border of ulna
FLEXOR CARPI ULNARIS (Insertion)
Pisiform
Hook of Hamate
Base of 5th metacarpal
FLEXOR CARPI ULNARIS (Action)
Flexion of wrist joint
Adduction of wrist joint
FLEXOR CARPI ULNARIS (Innervation)
Ulnar Nerve
FLEXOR DIGITORUM SUPERFICIALIS (Origin)
Medial epicondyle
Coronaid process of Humerus
Anterior surface of Radius
FLEXOR DIGITORUM SUPERFICIALIS (Insertion)
Palmar surface of shaft of middle phalanges of medial 4 digits
FLEXOR DIGITORUM SUPERFICIALIS (Action)
Flexion of proximal interphalangeal joints
Assist in flexion of wrist and metacarpophalangeal joints
FLEXOR DIGITORUM SUPERFICIALIS (Innervation)
Median Nerve
FLEXOR DIGITORUM PROFUNDUS (Origin)
Anterior and Medial surfaces of Ulna
Medial half interosseous membrane
FLEXOR DIGITORUM PROFUNDUS (Insertion)
Bases of Distal phalanges of medial 4 digits
FLEXOR DIGITORUM PROFUNDUS (Action)
Flexion of distal interphalangeal joints
FLEXOR DIGITORUM PROFUNDUS (Innervation)
MEDIAL half - Ulnar Nerve
LATERAL half - Anterior Interosseous Nerve (Median Nerve)
FLEXOR POLLICIS LONGUS (Origin)
Anterior surface of shaft of Radius
FLEXOR POLLICIS LONGUS (Insertion)
Base of Distal phalanx of thumb
FLEXOR POLLICIS LONGUS (Action)
Flexion interphalangeal joint of thumb
FLEXOR POLLICIS LONGUS (Innervation)
Anterior Interosseous Nerve (Median Nerve)
PRONATOR QUADRATUS (Origin)
Distal surface anteromedial aspect of Ulnar shaft
PRONATOR QUADRATUS (Insertion)
Distal surface anterolateral aspect of Radial shaft
PRONATOR QUADRATUS (Action)
Pronation
PRONATOR QUADRATUS (Innervation)
Anterior Interosseous Nerve (Median Nerve)
CUBITAL FOSSA
LATERAL border ~ Brachioradialis
MEDIAL border ~ Pronator Teres
- Brachial Artery
- Median Nerve
- Median Cubital vein
BRACHIORADIALIS (Origin)
Proximal part lateral supraepicondylar ridge of humerus
Adjacent intermuscular septum
BRACHIORADIALIS (Insertion)
Lateral surface distal end of Radius
BRACHIORADIALIS (Action)
Flexor of elbow when midpronated
(Drinking Muscle)
BRACHIORADIALIS (Innervation)
Radial Nerve
EXTENSOR CARPI RADIALIS LONGUS (Origin)
Lateral supraepicondylar ridge of Humerus
EXTENSOR CARPI RADIALIS LONGUS (Insertion)
Dorsal surface base of 2nd metacarpal
EXTENSOR CARPI RADIALIS LONGUS (Action)
Extends wrist joint
Abducts wrist joint
EXTENSOR CARPI RADIALIS LONGUS (Innervation)
Radial Nerve
EXTENSOR CARPI RADIALIS BREVIS (Origin)
Lateral epicondyle Humerus
Adjacent intermuscular septum
EXTENSOR CARPI RADIALIS BREVIS (Insertion)
Dorsal base of 2nd and 3rd metacarpals
EXTENSOR CARPI RADIALIS BREVIS (Action)
Extends wist joint
Abducts wrist joint
EXTENSOR CARPI RADIALIS BREVIS (Innervation)
Deep branch Radial Nerve
EXTENSOR DIGITORUM (Origin)
Lateral epicondyle Humerus
Adjacent intermuscular septum and deep fascia
EXTENSOR DIGITORUM (Insertion)
Extensor hoods Medial 4 digits
EXTENSOR DIGITORUM (Action)
Extends Medial 4 digits
EXTENSOR DIGITORUM (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
EXTENSOR DIGITI MINIMI (Origin)
Lateral epicondyle Humerus
Adjacent intermuscular septum
EXTENSOR DIGITI MINIMI (Insertion)
Extensor hood little finger
EXTENSOR DIGITI MINIMI (Action)
Extension of little finger
EXTENSOR DIGITI MINIMI (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
EXTENSOR CARPI ULNARIS (Origin)
Lateral epicondyle Humerus
Posterior border Ulna
EXTENSOR CARPI ULNARIS (Insertion)
Tubercle on base Medial side of 5th metacarpal
EXTENSOR CARPI ULNARIS (Action)
Extends wrist joint
Adducts wrist joint
EXTENSOR CARPI ULNARIS (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
ANCONEUS (Origin)
Lateral epicondyle Humerus
ANCONEUS (Insertion)
Olecranon
Proximal Posterior surface Ulna
ANCONEUS (Action)
Abducts Ulna during Pronation
ANCONEUS (Innervation)
Radial Nerve
SUPINATOR (Origin)
SUPERFICIAL layer:
- Humeral lateral epicondyle
- Radial collateral and annular ligament
DEEP layer:
- Supinator crest of Ulna
SUPINATOR (Insertion)
Lateral surface Radius
SUPINATOR (Action)
Supination
SUPINATION (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
EXTENSOR INDICIS (Origin)
Posterior surface Ulna
Adjacent interosseous membrane
EXTENSOR INDICIS (Insertion)
Extensor hood of index finger
EXTENSOR INDICIS (Action)
Extends index finger
EXTENSOR INDICIS (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
EXTENSOR POLLICIS LONGUS (Origin)
Posterior surface UIna
Adjacent interosseous membrane
EXTENSOR POLLICIS LONGUS (Insertion)
Dorsal surface base of proximal phalanx of thumb
EXTENSOR POLLICIS LONGUS (Action)
Extends interphalangeal joint of thumb
EXTENSOR POLLICIS LONGUS (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
EXTENSOR POLLICIS BREVIS (Origin)
Posterior surface Radius
Adjacent interosseous membrane
EXTENSOR POLLICIS BREVIS (Insertion)
Dorsal surface base of proximal phalanx of thumb
EXTENSOR POLLICIS BREVIS (Action)
Extends metacarpophalangeal joint of thumb
EXTENSOR POLLICIS BREVIS (Innernation)
Posterior Interosseous Nerve (Radial Nerve)
ABDUCTOR POLLICIS LONGUS (Origin)
Posterior surfaces Ulna and Radius
Adjacent interosseous membrane
ABDUCTOR POLLICIS LONGUS (Insertion)
Lateral side base of 1st metacarpal
ABDUCTOR POLLICIS LONGUS (Action)
Abducts carpometacarpal joint of thumb
ABDUCTOR POLLICIS LONGUS (Innervation)
Posterior Interosseous Nerve (Radial Nerve)
ANATOMICAL SNUFFBOX
MEDIALLY:
- Extensor Pollicis Longus
LATERALLY:
- Abductor Pollicis Longus
- Extensor Pollicis Brevis
FLOOR = Scaphoid bone