Muscles Of The Hand And Forearm

Front 1

Pronator Teres

Back 1

Origin: Humeral head- medial supracondylar ridge and medial epicondyle of the humerus.
Ulnar head -medial border of the coronoid process of the ulna.

Insertion- Middle of lateral surface of the radius (pronator tuberosity)

Hint 1

Action- pronation and flexion of the forearm.

Innervation- Median nerve (C6,C7)

Front 2

Flexor Carpi Radialis

Back 2

Origin- Medial epicondyle of the humerus through the common tendon.

Insertion- Front of the bases of the second and third metacarpal bones.

Hint 2

Action- Flexes the hand in synergy wih extensor carpi radialis longus and brevis.

Innervation- Median nerve (C6,C7)

Front 3

Palmaris Longus

Back 3

origin- Medial epicondyle of the humerus through he common tendon.

Insertion- Front (central part) of the flexor retinaculum and apex of the palmar aponeurosis.

Hint 3

Action- Flexes the hand

Innervation- Median (c6,c7)

Front 4

Flexor Carpi Ulnaris

Back 4

Origin- Humeral head, medial epicondyle of the humerus through the common tendon.
Ulnar head, Medial margin of the olecranon process of ulna, dorsal border shaft of ulna.

Insertion-Pisiform bone,hook of hamate, and base of the fith metacarpal bone

Hint 4

Action- Flexes hand, synergist in adduction with exensor carpi ulnaris.

Innervation- Ulnar nerve (C8,T1)

Front 5

Flexor Digitorum Superficialis

Back 5

Origin- Humeroulna head- medial epicondyle of the humerus through common thndon, medial margin of the coronoid process of the ulna.
Radial head- Anterior surface of radial shaft.

Insertion-Margins of the anterior surfaces of the middle phalanges of four fingers.

Hint 5

Action- Flxes the middle phalanges of the fingers.

Innervation- Median nerve ( C7,C8,T1)

Front 6

Flexor Digitorum Profundus

Back 6

Origin- Upper three fourths of anterior and medial surfaces of shaft of ulna and medial side of the coronoid process, interosseous membrane.

Insertion- Front of base of distal phalanges.

Hint 6

Action- Flexes distal phalanges

Innervation- ulnar supplies the medial half of the muscles( fourth and fith fingers)
Median nerve supplies latteral half (going to index and middle fingers, C8,T1)

Front 7

Flexor Pollicis Longus

Back 7

Origin- Middle of anterior of shaft of radius, inter osseous membrane , medial epicondyleof humerus.

Insertion- Palmar aspect of base of the distal phalanx of thumb

Hint 7

Action- Flexs the thumb

Innervation-median nerve (C8,T1)

Front 8

Pronator Quadratus

Back 8

Origin- Anerior surface of distal part of shaft of ulna.

Insertion- Lower portion of anterior surface of shaft of radius, distal part of lateral border of radius

Hint 8

Action- Pronates forearm and hand

Innervation- Median(C8,T1)

Front 9

Brachioradialis

Back 9

Origin- Upper two thirds of lateral supracondylar ridge of humerus

insertion- Base of styloid and lateral surface of radius

Hint 9

Action- Flexes forearm

Innervation- Radial nerve (C5,C6)

Front 10

Extensor Carpi Radialis Longus

Back 10

Origin- Lower third of lateral supracondylar ridge of humerus

Insertion-Dorsalsurface of the base of the second metacarpal bone

Hint 10

Action-Extends hand, synergist in abduction of hand with flexor carpi radialis.

Innervation- radial nerve (C6,C7)

Front 11

Extensor Carpi Radialis brevis

Back 11

Origin-Lateral epicondyle of humerus.

Insertion- Dorsal surface of third metacarpal bone

Hint 11

Action- Extends hand, synergist in abduction of hand with flexor carpi radialis.

Innervtion- Radial nerve (C7,C8)

Front 12

Extensor Digitorum

Back 12

Origin- Common tendon attached to latteral epicondyle of humerus.

Insertion- Lateral and dorsal surfaces of all the phalanges if the four fingers

Hint 12

Action- Extends the fingers and wrist.

Nerve- Deep branch of radial nerve (C7,C8)

Front 13

Extensor Digiti Minimi

Back 13

Origin - Common tendon attached to lateral epicondyle of humerus.

Insertion- Dorsal surface of base of first phalanax of fifth finger.

Hint 13

Action- Extends fifth finger.

Innervation- Radial nerve (C7,C8)

Front 14

Extensor Carpi Ulnaris

Back 14

Origin- Common tendon attached to lateral epicondyle of humerus

Insertion- Dorsal surface of base of fifth metacarpal bone

Hint 14

Action- Extends hand Synergist with carpi ulnaris

Innervation- Radial nerve (C7,C8)

Front 15

Supinator

Back 15

Origin; Lateral epicondyle of humerus , lateral ligament(Radial collateral) of the elbow, annular ligaament of superior radioulnar joint, supinator crest of ulna.

Insertion-Dorsal and lateral surfaces of upper third of radius

Hint 15

Action- Supinates forearm

Innervation- Radial nerve (C5,C6)

Front 16

Abductor Pollicis Longus

Back 16

Origin-Posterior (Dorsal) surface of shaft of radius, radius, ulna,inter osseous membrane.

Insertion- Dorsal surface of base of first metacarpal bone

Hint 16

Action- Abducts, laterally rotates, and extends thumb; abducts wrist.

Nerve- Radial nerve (C7,C8)

Front 17

Extensor Pollicis Brevis

Back 17

Origin- Dorsal surface of radius, adjacent part of interosseous membrane

Insertion-Base of proximal phalanxof thumb

Hint 17

Action- Extends thumb, abducts hand.

Innervation- Radial nerve ( C7,C8)

Front 18

Extensor Pollicis Longus8

Back 18

Origin- Middle third of dorsal surface of ulna, interosseous membrane

Insertion-Base of distal phalanx of thumb

Hint 18

Action- Extends thumb

Innervation- Radial nerve (C7,C8)

Front 19

Extensor Indicis

Back 19

Origin- Posterior surface of ulna and adjacent part of interosseous membrane

Insertion- Extensor expansion on dorsal surface of proximal phalanx of index finger.

Hint 19

Action- Extends index finger

Innervation- Radial nerve (C7,C8)