Muscles of the Forearm (Division, Origin, Insertion, Function)

Content Introduction 0:00 Division of the Forearm Muscles 0:23 Anterior (Flexor) Group 0:40 Pronator Quadratus 1:13 Flexor Digitorum Profundus 1:41 Flexor Pollicis Longus 2:11 Flexor Digitorum Superficialis 2:36 1st Layer 3:14 Lateral Group 4:48 Brachioradialis 5:28 Extensor Carpi Radialis Longus 5:55 Extensor Carpi Radialis Brevis 6:17 Posterior Group 6:42 Abductor Pollicis Longus 7:05 Extensor Pollicis Brevis 7:25 Extensor Pollicis Longus 7:45 Extensor Indicis 8:05 Extensor Digitorum 8:35 Extensor Digiti Minimi 8:57 Extensor Carpi Ulnaris 9:20 ---------------------------------------------- ☕Support me at: ----------------------------------------------- Muscles of the forearm - Anterior (Flexor) group - Lateral (Radial) group - Posterior (Extensor) group Anterior (Flexor) group - 1st Layer ○ Palmaris Longus ○ Flexor Carpi Radialis ○ Pronator Teres ○ Flexor Carpi Ulnaris - 2nd Layer ○ Flexor Digitorum Superficialis - 3rd Layer ○ Flexor Digitorum Profundus ○ Flexor Pollicis Longus - 4th Layer ○ Pronator Quadratus Pronator Quadratus musculus pronator quadratus - O: Anterior surface of Ulna - I: Anterior surface of Radius - F: Pronation of forearm Flexor Digitorum Profundus Musculus flexor digitorum profundus - O: Anterior surface of Ulna I: Base of the distal phalanges (2-5 finger) basis phalangis distalis (II-V) - F: Flexion of 2-5th fingers at metacarpophalangeal and interphalangeal joints Accessory flexion of hand Flexor Pollicis Longus musculus flexor pollicis longus - O: Anterior surface of Radius I: Base of the distal phalanges of the thumb basis phalangis distalis pollicis - F: Flexion of thumb at metacarpophalangeal and interphalangeal joints Accessory flexion of hand - Flexor Digitorum Superficialis musculus flexor digitorum superficialis O: Medial epicondyle of humerus Ulna Anterior surface of radius I: Base of the middle phalanges of 2-5th fingers basis phalangis mediale II-V F: Flexion of 2-5 fingers at metacarpophalangeal and proximal interphalangeal joints Accessory flexion of hand - Pronator Teres musculus pronator teres - I: Anterolateral surface of Radius Flexor Carpi Radialis musculus flexor carpi radialis - I: Base of 2nd and 3rd metacarpal Palmaris Longus musculus palmaris longus I: Palmar Aponeurosis aponeurosis palmaris Flexor Carpi Ulnaris musculus flexor carpi ulnaris - I: Pisiform, Hamatum and base of 5th metacarpal Lateral (Radial) group - Superficial Layer ○ Brachioradialis ○ Extensor Carpi Radialis Longus ○ Extensor Carpi Radialis Brevis - Deep Layer Supinator Supinator musculus supinator O: Lateral Epicondyle Radial Collateral Ligament Ulna - I: Lateral Surface of Radius - F: Supination of the forearm Brachioradialis musculus brachioradialis - O: Lateral margin of humerus - I: Radius above Styloid Process F: - Supination/Pronation - Flexion of forearm - Stabilises elbow joint Extensor Carpi Radialis Longus musculus extensor carpi radialis longus - O: Lateral margin Lateral Epicondyle of Humerus I: Base of 2nd metacarpal basis ossis metacarpalis II F: Abduction of hand Extension of hand - Extensor Carpi Radialis Brevis musculus extensor carpi radialis brevis - O: Lateral Epicondyle of Humerus I: Base of 3nd metacarpal basis ossis metacarpalis III F: Abduction of hand Extension of hand Posterior (Extensor) group - Superficial Layer ○ Extensor Digitorum ○ Extensor Digiti Minimi ○ Extensor Carpi Ulnaris - Deep Layer ○ Abductor Pollicis Longus ○ Extensor Pollicis Brevis ○ Extensor Pollicis Longus ○ Extensor Indicis Abductor Pollicis Longus musculus abductor pollicis longus O: Posterior surface of Ulna/Radius Interosseous membrane I: Base of 1st metacarpal F: Abduction of thumb Extensor Pollicis Brevis musculus extensor pollicis brevis O: Posterior surface of Radius Interosseous membrane I: Base of proximal phalanx of thumb F: Extension and abduction of thumb Extensor Pollicis Longus musculus extensor pollicis longus O: Posterior surface of Ulna Interosseous membrane I: Base of distal phalanx of thumb F: Extension of thumb Extensor Indicis musculus extensor indicis O: Posterior surface of Ulna Interosseous membrane I: Base of middle/distal phalanx of index finger F: Extension of Index finger (2nd finger) Extensor Digitorum musculus extensor digitorum O: Lateral Epicondyle of Humerus I: Base of middle and distal phalanges of 2-5th fingers F: Abduction of Fingers Extension of hand Extensor Digiti Minimi musuclus extensor digiti minimi O: Lateral Epicondyle of Humerus I: Base of middle and distal phalanges of 5th fingers F: Extension of 5th finger Extensor Carpi Ulnaris musculus extensor carpi ulnaris O: Lateral Epicondyle of Humerus Posterior surface of Ulna I: Base of 5th metacarpal bone (medial side) basis ossis metacarpalis V F: Extension of hand Adduction of hand