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MS1 > Muscles Of The Forearm And Hand (Origins And Insertions) > Flashcards

Muscles Of The Forearm And Hand (Origins And Insertions) Flashcards

From Lecture 8

1
Q

Name the superficial muscles of the anterior fascial compartment of the forearm

A

-Pronator teres
-Flexor carpi radialis
-Palmaris longus
-Flexor carpi ulnaris

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2
Q

Name the O and I of the pronator teres

A

O: Humeral head- medial epicondyle of humerus (above CFO)
Ulnar head- coronoid process of ulna (med surface)

I: Midlateral surface of radial shaft

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3
Q

Name the O and I of the flexor carpi radialis

A

O: Medial epicondyle of humerus via common flexor tendon

I: Base of 2nd and 3rd metacarpal (palmar surface)

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4
Q

Name the O and I of the palmaris longus

A

O: Medial epicondyle of humerus via common flexor tendon

I: Palmar carpal ligament and palmar aponeurosis (flexor retinaculum)

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5
Q

Name the O and I of the flexor carpi ulnaris

A

O: Humeral head- medial epicondyle via common flexor tendon
Ulnar head- olecranon and posterior border of ulna (superior 2/3)

I: Pisiform, hook of hamate and base of 5th metacarpal

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6
Q

Name the middle muscle of the anterior fascial compartment of the forearm

A

-Flexor digitorum superficialis

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7
Q

Name the O and I of the flexor digitorum superficialis

A

O: Humeroulnar head- medial epicondyle of humerus and coronoid process of ulna (medial side)
Radial head- oblique line of radius (anterior surface)

I: Shaft of middle phalanges of digits 2-5

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8
Q

Name the deep muscles of the anterior fascial compartment of the forearm

A

-Flexor digitorum profundus
-Flexor pollicis longus
-Pronator quadratus

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9
Q

Name the O and I of the flexor digitorum profundus

A

O: Proximal 2/3 of anterior surface of ulna and interosseus membrane

I: Bases of distal phalanges of digits 2-5

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10
Q

Name the O and I of the flexor pollicis longus

A

O: Anterior surface of radius (middle 1/2) and interosseus membrane

I: Base of distal phalanx of first digit

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11
Q

Name the O and I of the pronator quadratus

A

O: Distal 1/4 of anterior surface of ulna

I: Distal 1/4 of anterior surface of radius (slightly distal to origin)

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12
Q

Name the superficial muscles of the posterior fascial compartment of the forearm

A

-Brachioradialis
-Extensor carpi radialis longus
-Extensor carpi radialis brevis
-Extensor digitorum
-Extensor digiti minimi
-Extensor carpi ulnaris

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13
Q

Name the O and I of the brachioradialis

A

O: Lateral supracondylar ridge of humerus (and lateral intermuscular septum)

I: Base of styloid process of radius

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14
Q

Name the O and I of the extensor carpi radialis longus

A

O: Distal 1/3 of lateral supracondylar ridge of humerus

I: Base of 2nd metacarpal (dorsal surface)

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15
Q

Name the O and I of the extensor carpi radialis brevis

A

O: Lateral epicondyle of humerus via common extensor tendon

I: Base of 3rd metacarpal (dorsal and radial surface)

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16
Q

Name the O and I of the extensor digitorum

A

O: Lateral epicondyle of humerus via common extensor tendon

I: Middle and distal phalanges of digits 2-5

17
Q

Name the O and I of the extensor digiti minimi

A

O: Lateral epicondyle of humerus via common extensor tendon

I: Tendon of extensor digitorum of 5th digit (extensor expansion or hood)

18
Q

Name the O and I of the extensor carpi ulnaris

A

O: Lateral epicondyle of humerus via common extensor tendon and posterior border of ulna

I: Base of 5th metacarpal (ulnar surface)

19
Q

Name the deep muscle of the posterior fascial compartment of the forearm

A

-Supinator
-Abductor pollicis longus
-Extensor pollicis longus
-Extensor pollicis brevis
-Extensor indicis

20
Q

Name the O and I of the abductor pollicis longus

A

O: Posterior surface of middle radius and ulna and interosseus membrane

I: Base of 1st metacarpal (lateral/radial side)

21
Q

Name the O and I of the supinator

A

O: Lateral epicondyle of humerus, radial collateral and annular ligaments, and supinator crest of ulna

I: Superior 1/3 of lateral and anterior surface of radius

22
Q

Name the O and I of the extensor pollicis longus

A

O: Middle 1/3 of posterior surface of ulna and interosseus membrane (distal to AbdPL)

I: Base of distal phalanx of thumb

23
Q

Name the O and I of the extensor pollicis brevis

A

O: Posterior surface of middle radius and interosseus membrane (distal to AbdPL)

I: Base of proximal phalanx of thumb

24
Q

Name the O and I of the extensor indicis

A

O: Distal posterior surface of the ulna and interosseus membrane

I: Tendon of extensor digitorum on 2nd digit (extensor expansion or hood)

25
Q

Name the muscles of the thenar group of the intrinsic muscles of the hand

A

-Abductor pollicis brevis
-Opponens pollicis
-Flexor pollicis brevis
-Adductor pollicis

26
Q

Name the O and I of the abductor pollicis brevis

A

O: Flexor retinaculum, scaphoid, and tubercle of trapezium

I: Base of proximal phalanx of first digit (lateral/radial aspect)

27
Q

Name the O and I of the opponens pollicis

A

O: Flexor retinaculum and trapezium

I: Lateral shaft of first metacarpal (radial side)

28
Q

Name the O and I of the flexor pollicis brevis

A

O: Flexor retinaculum and trapezium

I: Base of proximal phalanx of first digit (lateral/radial aspect)

29
Q

Name the muscles of the hypothenar group of the intrinsic muscle of the hand

A

-Palmaris brevis
-Abductor digiti minimi

Hypothenar group continued:
-Flexor digiti minimi brevis
-Opponens digiti minimi

29
Q

Name the O and I of the adductor pollicis

A

O: Oblique head- capitate and bases of metacarpals 2 and 3
Transverse head- 3rd metacarpal (anterior surface)

I: Medial side of proximal phalanx of thumb

30
Q

Name the O and I of the palmaris brevis

A

O: Flexor retinaculum and palmar aponeurosis

I: Skin on ulnar border of palm of hand

31
Q

Name the O and I of the abductor digiti minimi

A

O: Pisiform

I: Base of proximal phalanx of 5th digit

32
Q

Name the O and I of the flexor digiti minimi brevis

A

O: Flexor retinaculum and hook of hamate

I: Base of proximal phalanx of 5th digit

33
Q

Name the O and I of the opponens digiti minimi

A

O: Flexor retinaculum and hook of hamate

I: Medial border of shaft of 5th metacarpal

34
Q

Name the muscles of the intermediate/central group of the intrinsic muscles of the hand

A

-Lumbricales
-Dorsal interosseii
-Palmar interosseii

35
Q

Name the O and I of the lumbricales

A

O: Tendons of flexor digitorum profundus (off lateral aspect of 2nd-5th tendons and medial aspect of 3rd and 4th tendons)

I: Extensor expansion (hoods) of digits 2-5

36
Q

Name the O and I of the dorsal interosseii

A

O: Adjacent sides of shaft of metacarpals (2 heads)

I: Extensor expansions and bases of proximal phalanges of digits 2-4

37
Q

Name the O and I of the palmar interosseii

A

O: Palmar medial surface of 2nd metacarpal and palmar lateral surface of 4th and 5th metacarpal (1 head)

I: Extensor expansions and bases of proximal phalanges of digits 2, 4, and 5

MS1 (11 decks)

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