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Phys Dis > Hand, Wrist & Forearm Anatomy > Flashcards

Hand, Wrist & Forearm Anatomy Flashcards

1
Q

Intrinsic Muscles Innervated by Median Nerve

A

Abductor pollicus longus, opponens pollicis, flexor pollicus brevis (superficial head) & Lumbricals (of the radial side)

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2
Q

Abductor Pollicus Brevis

A

Origin: Scaphoid, trapezium, flexor retinaculum & tendon of abd pollicus longus
Insertion: base of prox phalanx, radial side of thumb
Fx: Palmar abd

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3
Q

Opponens Pollicus

A

Origin: Trapezium & flexor retinaculum
Insertion: First metacarpal
Fx: opposition

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4
Q

Flexor Pollicus Brevis

A

Origin: Trapezium, trapezoid, capitate & flexor retinaculum
Insertion: base of prox phalanx, radial side of thumb
Fx: thumn MCP flex - deep head innervated by ulnar nerve

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5
Q

Radial Side Lumbricals

A

Origin: tendons of flexor digitorium profund, index/mid fingers (radial/palmar sides)
Insertion: radial side of digits II & III into extensor expansion
Fx: MCP flex and IP extend

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6
Q

Intrinsic Muscles Innervated by Ulnar Nerve

A

Abductor digiti minimi, opponens digiti minimi, flexor digiti minimi, adductor, ulnar side lumbricals, palmar interossi & dorsal interossi

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7
Q

Abductor Digiti Minimi

A

Origin: Pisiform& tendon of flexor carpi ulnaris
Insertion: prox phalanx of 5th digit
Fx: Abduction of 5th digit

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8
Q

Opponens Digiti Minimi

A

Origin: hook of hamate and flex retinaculum
Insertion: 5th metacarpal
Fx: opposition of 5th digit

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9
Q

Adductor

A

Origin: oblique head: bases of 2/3rd metacarpal, trapezoid & capitate. transverse head: palmar border/shaft of 3rd metacarpal
Insertion: sesamoid, base of prox phalanx, tendon of ex pollicus longus
Fx: Adducts CMC joint of thumb

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10
Q

Ulnar Side Lumbricals

A

Origin: Tendons of flex digitorum profundus for 4/5th digit
Insertion: Radial side of 4/5th digits into extensor expansion
Fx: MCP flex/extension of 4/5th IP joints

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11
Q

Palmar Interossi

A

Origin: 1st - ulnar surface of 2nd metacarpal; 2nd - radial surface of 4th metacarpal: 3rd - radial surface of 5th metacarpal
Insertion: 1st - ulnar surface of 2nd prox phalanx; 2nd - radial surface of 4th prox phalanx: 3rd - radial surface of 5th prox phalanx
Fx: Adduction & assistance w MCP flex/exten of 2nd-5th IP joints

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12
Q

Dorsal Interossi

A

Origin: All 4 muscles arise from the adjacent sides of the metacarpals
Insertion: prox phalanx on radial aspect of index, radial/ulnar sides of mid, and ulnar side of ring - all into extensor digitorum
Fx: aBduction & assistance with MCP flex/exten of 2nd-5th IP joints

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13
Q

Extrinsic Flexor Muscles of the Hand Innervated by the Median Nerve

A

Flexor digitorum superficialis, flexor digitorum profundus & flexor pollicus longus

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14
Q

Flexor digitorum superficialis (FDS)

A

Origin: medial epicondyle
Insertion: mid phalanx (2 slips)
Fx: PIP joint flexion

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15
Q

Flexor digitorum profundus (FDP)

A

Origin: Prox 2/3 of ulna/interossious mem
Insertion: Distal Phalanx
Fx: 2-3 DIP joint flex

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16
Q

Flexor Pollicus Longus (FPL)

A

Origin: mid 1/3 of radius
Insertion: distal phalanx of thumb
Fx: thumb IP joint flex

17
Q

Extrinsic Flexors of Hand Innervated by Ulnar Nerve

A

Flexor digitorum profundus

18
Q

Flexor digitorum profundus

A

Origin: Prox 2/3 of ulna/interosseous mem
Insertion: Distal phalanx
Fx: Flex of DIP joints to digits 4-5

19
Q

Extrinsic Extensor Muscles of Hand Innervated by Radial Nerve

A

Extensor digitorum communis, extensor digiti minimi, extensor indicis proprius, extensor pollicus longus, extensor pollicus brevis, abductor pollicus longus

20
Q

Extensor digitorum communis (EDC)

A

Origin: Lat epicondyle
Insertion: medial band to mid phalanx & lat band to distal phalanx
Fx: Exten of MCP joints & contributes to exten of IP joints

21
Q

Extensor Digiti Minimi (EDM)

A

Origin: Lat Epicondyle
Insertion: Into EDC at MCP level of the 5th digit
Fx: Exten of 5th MCP joint & contributes to exten of IP joints

22
Q

Extensor indicis proprius (EIP)

A

Origin: Mid 1/3 of Ulna
Insertion: Into EDC at MCP level
Fx: Exten of MCP joint of 2nd digit & contributes to exten of IP joints

23
Q

Extensor pollicus longus (EPL)

A

Origin: Mid 1/3 of Ulna
Insertion: Distal phalanx of thumb
Fx: Exten of thumb IP joint

24
Q

Extensor Pollicus Brevis (EPB)

A

Origin: Mid 1/3 of Radius
Insertion: Prox phalanx of thumb
Fx: Exten of MCP/CMC joints of thumb

25
Q

Abductor Pollicus Longus (APL)

A

Origin: Mid 1/3 of ulna/radius
Insertion: 1st metacarpal - radial side
Fx: Abduction/exten of CMC joint

26
Q

Wrist Flexors Innervated by Median Nerve

A

Flexor Carpi Radialis & Palmaris Longus

27
Q

Flexor Carpis Radialis (FCR)

A

Origin: Medial epicondyle
Insertion: 2nd/3rd metacarpal, base
Fx: Flex of wrist/radial deviation

28
Q

Palmaris Longus (PL)

A

Origin: Medial epicondyle
Insertion: Palmar aponeurosis
Fx: wrist flex

29
Q

Wrist flexors innervated by the ulnar nerve

A

Flexor carpi ulnaris (FCU)

30
Q

Flexor Carpi Ulnaris (FCU)

A

Origin: Med epicondyle & prox 2/3 of ulna
Insertion: Pisiform & 5th metacarpal
Fx: Flex of wrist/ulnar dev

31
Q

Wrist Extensors Innervated by Radial Nerve

A

Extensor Carpi Radialis Bervis, Extensor Carpi Radialis Longus & Extensor Carpi Ulnaris

32
Q

Extensor Carpi Radialis Bervis (ECRB)

A

Origin: Lat epi
Insertion: 3rd metacarpal, base
Fx: wrist exten/radial dev

33
Q

Extensor Carpi Radialis Longus (ECRL)

A

Origin: Supracondylar ridge of hummerus
Insertion: 2nd metacarpal base
FX: wirst ex/radial dev

34
Q

Extensor Capri Ulnaris (ECU)

A

Origin: Lat epi
Insertion: 5th Metacarpal
Fx: ulnar dev/wrist exten

35
Q

Volar Forearm Muscles Innervated by Medial Nerve

A

Pronator teres & quadratus

36
Q

Pronator Teres

A

Origin: Med epi & coronoid process of ulna
Insertion: Lat surface of radius
Fx: Forearm pronation

37
Q

Pronator Quadratus

A

Origin: distal ulna
Insertion: distal radius
Fx: forearm pronation

38
Q

Dorsal Forearm Muscles Innervated by Radial Nerve

A

Supinator

39
Q

Supinator

A

Orgin: Lat epi & ulna
Insertion: Radius
Fx: Forearm supination

Phys Dis (15 decks)

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