Chapter 7 - Muscles of the forearm and hand
Adductor Pollicis - Action
Adducts thumb
Flexor Carpi Ulnaris - Action
Flexes and adducts wrists
Flexor Pollicis Longus - Action
Flexes interphalangeal joint of thumb.
Flexor Digiti Minimi Brevis - Action
Flexes little finger at metacarpophalangeal joint
Flexor Digitorum Superficialis - Action
Flexes middle phalanges of each finger. Flex wrist
Lumbricales - Origin, Insertion, Nerve
Origin: Tendons of flexor digitorum profundus Insertion: Lateral side of corresponding tendon of extensor digitorum Nerve: Lateral lumbricales median nerve C6, 7, 8, T1
Flexor Digitorum Profundus - Origin, Insertion, Nerve
Origin: Upper 2/3 of medial and anterior surfaces of ulna Insertion: Anterior surface of base of distal phalanges Nerve: Medial half of muscle C, 8 T1. Lateral half of muscle C7, C8, T1
Opponens Digiti Minimi - Action
Pulls metacarpal of little finger forward and rotates it laterally
Supinator - Action
Supinates forearm
Palmaris Brevis - Action
Wrinkles skin on ulnar border of hand
Muscles of the Hand
1. Abductor pollicis brevis 2. Flexor pollicis brevis 3. Adductor pollicis 4. LUmbricales 5. Opponens digiti minimi 6. Abductor digiti minimi
Muscles of the posterior forearm
1. Brachioradialis 2. Supinator 3. Abductor pollicis longus 4. Extensor pollicis brevis 5. Extensor pollicis longus 6. Extensor indicis 7. Extensor carpi ulnaris 8. Entensor digiti minimi 9. Extensor Carpi radialis longus 10. Extensor digitorum 11. Extensor carpi radialis brevis
Muscles of the anterior forearm
1. Pronator teres 2. Pronator quadratus 3. Palmaris longus 4. Flexor carpi ulnaris 5. Flexor digitorum profundus 6. Flexor digitorum superficialis 7. Flexor pollicis longus 8. Flexor carpi radialis
Dorsal Interossei - Action
Abducts fingers away from middle finger
Abductor Digiti Minimi - Action
Abducts little finger
Abductor Pollicis Brevis - action
Abducts thumb and moves it anteriorly
Palmar Interossei - Action
Adducts fingers and thumb toward middle finger
Extensor Carpi Ulnaris - Action
Extends and adducts wrist
Extensor Digitorum - Action
Extends fingers
Extensor Indicis - Action
Extends index finger
Extensor Pollicis Brevis - Action
Extends thumb, abducts wrist
Extensor Carpi Radialis Brevis - Action
Extends wrist
Flexor Carpi Radialis - Action
Flexes and abducts carpus, wrist joint. Helps to flex elbow and pronate forearm
Palmaris Longus - Action
Flexes wrist, tenses palmar fascia
Lumbricales - picture
No picture available, Muscle in between metacarpals, connecting to metacarpals on each side of muscle. Page 206
Opponens Pollicis - Action
Opposes thumb so the pad can be drawn into contact with pads of fingers
Abductor pollicis longus - Origin, Insertion, Nerve
Origin: Posterior surface of shaft of ulna, distal to origin of supinator. Insertion: Radial side of base of first metacarpal Nerve: Deep radial nerve C6, 7, 8
Dorsal interossei - Origin, Insertion, Nerve
Origin: Adjacent sides of metacarpals Insertion: Lateral and medial side of phalanges Nerve: Ulnar nerve C8, T1
Extensor Carpi Radialis Brevis - Origin, Insertion, Nerve
Origin: Common extensor tendon from lateral epicondyle of humerus Insertion: Dorsal surface of third metacarpal Nerve: Radial nerve C5, 6, 7, 8
Extensor Digitorum - Origin, Insertion, Nerve
Origin: Common extensor tendon from lateral epicondyle of humerus Insertion: Dorsal surfaces of all the phalanges of the four fingers Insertion: Deep radial nerve C6, 7, 8
Flexor Carpi Radialis - Origin, Insertion, Nerve
Origin: Common flexor origin on anterior aspect of medial epicondyle of humerus Insertion: Front of bases of second and third metacarpal bones Nerve: Median nerve C6, 7, 8
Palmaris Longus - Origin, Insertion, Nerve
Origin: Common flexor origin on anterior aspect of medial epicondyle of humerus Insertion: Superficial surface of flexor retinaculum and apex of palmar aponeurosis Nerve: Median nerve C6, 7, 8, T1
Pronator Quadratus - Origin, Insertion, Nerve
Origin: Distal quarter of anterior surface of shaft of ulna Insertion: Lateral side of distal quarter of anterior surface of shaft of radius Nerve: Anterior interosseous branch of median nerve C7, 8, T1
Extensor Digiti Minimi - Origin, Insertion, Nerve
Origin: Extensor tendon from lateral epicondyle of humerus Insertion: Extensor expansion of little finger with extensor digitorum tendon Nerve: Deep radial nerve C6, 7, 8
Extensor Carpi Ulnaris - Origin, Insertion, Never
Origin: Extensor tendon from lateral epicondyle of humerus Insertion: Medial side of base of fifth metacarpal Nerve: Deep radial nerve C6, 7, 8
Abductor Pollicis Brevis - Origin, Insertion, Nerve
Origin: Flexor retinaculum Insertion: Radial side of base of proximal phalanx of thumb Nerve: Median nerve C7, 8, 9 T1
Opponens Pollicis - Origin, Insertion, Nerve
Origin: Flexor retinaculum Insertion: Entire length of radial border of thumb Nerve: Median nerve C6, 7, 8, T1
Flexor Pollicis Brevis - Origin, Insertion, Nerve
Origin: Flexor retinuculum Insertion: Radial side of proximal thumb Nerve C6, 7, 8, T1
Opponens Digit Minimi - Origin, Insertion, Nerve
Origin: Hook of hamate Insertion: Entire length of little finger Nerve Ulnar nerve C7, 8 T1
Flexor Digiti Minimi Brevis - Origin, Insertion, Nerve
Origin: Hook of hamate Insertion: Ulna side of little finger Nerve: Ulnar nerve C7, 8, T1
Flexor carpi ulnaris - Origin, Insertion, Nerve
Origin: Humeral Head: Common flexor origin on medial epicondyle of humerus Ulnar head: medial border of olecranon. Posterior border of upper two-thirds of ulna Insertion: Pisiform bone, hook of hamate, base of fifth metacarpal
Pronator Teres - Origin, Insertion, Nerve
Origin: Humeral head: lower third of medial supracondylar ridge Ulnar Head: Medial border of coronoid process of ulna Insertion: Mid-lateral surface of radius Never: Median nerve C6, 7
Flexor Digitorum Superficialis - Origin, Insertion, Nerve
Origin: Humeroulnar head, Radial Head Insertion: Four tendons each divide into two slips into phalanges Nerve: Median Nerve: C7, C8, T1
Palmar Interossei - Origin, Insertion, Nerve
Origin: Medial side of metacarpal Insertion: Medial side of phalanges or lateral side Nerve: Ulnar nerve C8, T1
Flexor Pollicis Longus - Origin, Insertion, Nerve
Origin: Middle part of anterior surface of radius, Medial border of coronoid process of ulna Insertion: Palmar surface of base of distal phalanx of thumb Nerve: Anterior interosseous branch of median nerve C6, C7, C8, T1
Extensor Pollicis Longus - Origin, Insertion, Nerve
Origin: Middle third of posterior surface of ulna Insertion: Dorsal surface of base of distal phalanx of thumb Nerve: Deep radial nerve C6, 7, 8
Palmaris Brevis - Origin, Insertion, Nerve
Origin: Palmar aponeurosis Insertion: Skin on ulnar border of hand Nerve: Ulnar C7, 8 T1
Adductor Pollicis - Origin, Insertion, Nerve
Origin: Palmar surface of third metacarpal bone Insertion: Ulna side of base of proximal thumb Nerve Deep ulnar nerve C8, T1
Abductor Digiti Minimi - Origin, Insertion, Nerve
Origin: Pisiform bone Insertion: Ulna side of base of little finger Nerve: Ulnar nerve C7, 8 T1
Extensor Pollicis Brevis - Origin, Insertion, Nerve
Origin: Posterior surface of radius Insertion: base of dorsal surface of proximal phalanx of thumb Nerve: Deep radial nerve C6, 7, 8
Extensor Indicis - Origin, Insertion, Nerve
Origin: Posterior surface of ulna Insertion: Extensor expansion on dorsum of proximal phalanx or index finger Nerve: Deep radial nerve C6, 7, 8
Supinator - Origin, Insertion, Nerve
Origin: lateral epicondyle of humerus and radial collateral ligament of elbow joint Insertion: Dorsal and lateral surfaces of upper third of posterior interosseous nerve Nerve: Posterior interosseous nerve
Pronator Teres - Action
Pronates forearm and assists in flexion of elbow joint
Pronator Quadratus - Action
Pronates forearm and hand.