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DPT: Anatomy > Hand/Wrist Muscles > Flashcards

Hand/Wrist Muscles Flashcards

1
Q

Pronator Teres

A

O: medial epicondyle of humerus; coronoid process of ulna
I: middle/lateral surface of radius
A: pronated forearm and flexes it
N: median n, (C6, 7)

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2
Q

Flexor Carpi Radialis

A

O: medial epicondyle of humerus

I: base of 2nd metacarpal bone

A: flexes hand and abducts it

N: median n. (C6, 7)

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3
Q

Palmaris Longus

A

O: medial epicondyle of humerus

I: distal 1/2 of flexor retinaculum and palmar aponeurosis

A: flexes hand and tightens palmar aponeurosis

N: median n. (C7, 8)

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4
Q

Flexor Carpi Ulnaris

A

O: humeral- medial epicondyle of humerus; ulnar- olecranon and post. Border of ulna

I: pisiform bone, hook of hamate bone, 5th metacarpal bone

A: flexes hand and addicts it

N: ulnar n. (C7, 8)

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5
Q

Flexor Digitorum Superficialis

A

O: humeroulnar head- medial epicondyle of humerus, UCL, coronoid process of ulna; radial head- sup. 1/2 of ant radius

I: bodies of middle phalanges of medial four digits

A: flexes middle phalanges of medial 4 digits; stronger action flexes prox. Phalanges and hand

N: median n. (C7, 8, T1)

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6
Q

Flexor Digitorum Profundus

A

O: prox. 3/4 of medial and anterior surfaces of ulna and Interosseous membrane

I: bases of distal phalanges of medial 4 digits

A: flexes distal phalanges of medial 4 digits

N: medial- ulnar n. (C8, T1); lateral- median n. (C8, T1)

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7
Q

Flexor Pollicis Longus

A

O: anterior surface of radius and adjacent Interosseous membrane

I: base of distal phalanx of thumb

A: flexes phalanges of 1st digit (thumb)

N: anterior Interosseous n. (From median n.; C8, T1)

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8
Q

Pronator Quadratus

A

O: distal 1/4 of ant. Surface of ulna

I: distal 1/4 of ant. Surface of radius

A: probated forearm; deep fibers bind radius and ulna together assisting Interosseous membrane

N: anterior Interosseous n. (From median n.; C8, T1)

PRIMARY PRONATOR

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9
Q

Brachioradialis

A

O: prox. 2/3 of lateral supraepicondylar ridge of humerus

I: lateral surface of distal radius prox. To sty loud

A: flexes forearm

N: radial n. (C5, 6, 7)

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10
Q

Extensor Carpi Radialis Longus

A

O: lateral supracondylar ridge of humerus

I: base of 2nd metacarpal bone

A: extend and abduct hand at wrist joint

N: radial n. (C6, 7)

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11
Q

Extensor Carpi Radialis Brevis

A

O: lateral epicondyle of humerus

I: base of 3rd metacarpal bone

A: extend and abduct hand at wrist joint

N: deep branch of radial n. (C7, 8)

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12
Q

Extensor Digitorum

A

O: lateral epicondyle of humerus

I: extensor expansion of medial 4 digits

A: extends medial 4 digits at MCP, PIP, and DIP; extends hand at wrist

N: posterior Interosseous n. (C7, 8)- branch of radial n.

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13
Q

Extensor Digiti Minimi

A

O: lateral epicondyle of humerus

I: extensor expansion of 5th digit

A: extends digit 5 at MCP, PIP, DIP

N: posterior Interosseous n. (C7, 8)- branch of radial n.

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14
Q

Extensor Carpi Ulnaris

A

O: lateral epicondyle and post. Border of ulna

I: base of 5th metacarpal

A: extends wrist and ulnar deviates hand and wrist

N: posterior Interosseous n. (C7, 8) -branch of radial n.

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15
Q

Anyone us

A

O: lateral epicondyle of humerus

I: lateral surface of olecranon and superior part of posterior surface of ulna

A: assists triceps in extending elbow joint; stabilizes elbow; abducts ulna during pronation

N: radial n. (C7, 8, T1)

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16
Q

Supinator

A

O: lateral epicondyle of humerus, RCL and annular ligaments; Supinator fossa and crest of ulna

I: lateral, posterior, and anterior surfaces of proximal 1/3 of radius

A: Supinator forearm (in non-forceful supination)

N: deep branch of radial n. (C7, 8)

17
Q

Abductor Pollicis Longus

A

O: posterior surfaces of ulna and radius and Interosseous membrane

I: base of 1st metacarpal

A: abducts thumb and extends it at CMC joint

N: posterior Interosseous n. (C7, 8)

18
Q

Extensor Pollicis Brevis

A

O: post. Surface of radius and Interosseous membrane

I: base of prox. Phalanx of thumb via. Extensor expansion

A: extends thumb; prox. Phalanx at MCP joint

N: posterior Interosseous n. (C7, 8)

19
Q

Extensor Pollicis Longus

A

O: post. Surface of middle of ulna and Interosseous membrane

I: base of distal phalanx of thumb via extensor expansion

A: extends distal phalanx of thump at IP joint and MCP joint

N: post. Interosseous n. (C7, 8)

20
Q

Extensor Indices

A

O: post. Surface of ulna and Interosseous membrane

I: Extensor expansion of 2nd digit

A: extends index finger independently; assists in wrist extension

N: post. Interosseous n (C7, 8)

21
Q

Abductor Pollicis Brevis

A

O: flexor retinaculum and tubercles of scaphoid and trapezium bone

I: lat. side of base of prox. Phalanx of thumb

A: abducts thumb and helps oppose it

N: recurrent branch of median n (C8, T1)

22
Q

Flexor Pollicis Brevis

A

O: superficial- flexor retinaculum and tubercle of trapezium; deep= floor of carpal tunnel

I: lat. side of base of prox. Phalanx of thumb

A: flexes thumb

N: sup head- recurrent branch of median n. (C8, T1); deep- deep branch of ulnar n. (C8, T1)

23
Q

Opponens Pollicis

A

O: flexor retinaculum and tubercle of trapezium

I: Lat. side of base of prox. Phalanx of thumb

A: opposes thumb toward center of palm and rotates it Medially

N: recurrent branch of median n. (C8, T1)

24
Q

Adductor Pollicis

A

O: oblique- bases of metacarpals 2, 3, capitate and adjacent carpal bones; transverse- ant. Surface of 3rd metacarpal

I: med. side of base of prox. Phalanx of thumb

A: addicts thumb toward middle digit

N: deep branch of ulnar n. (C8, T1)

25
Q

Abductor Digiti Minimi

A

O: pisiform bone

I: medial side of base of prox. Phalanx of digit 5

A: abducts digit 5

N: deep branch of ulnar n. (C8, T1)

26
Q

Flexor Digiti Minimi Brevis

A

O: hook of hamate bone and flexor retinaculum

I: med. side of base of prox. Phalanx of digit 5

A: flexes prox. Phalanx of digit 5

N: deep branch of ulnar n. (C8, T1)

27
Q

Opponens Digiti Minimi

A

O: hook of hamate bone and flexor retinaculum

I: med. border of 5th metacarpal

A: draws 5th metacarpal bone Anteriorly and rotates it bringing digit 5 into opposition to thumb

N: deep branch of ulnar n. (C8, T1)

28
Q

Lumbricals 1 and 2

A

O: Lat. two tendons of flexor Digitorum Profundus (index and middle finger)

I: Lat. sides of extensor expansion of digits 2 and 3

A: flex digits at metac

DPT: Anatomy (20 decks)

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