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ACTM Myology > Wrist & Fingers > Flashcards

Wrist & Fingers Flashcards

Muscle Attachments

1
Q

Flexor Carpi Radialis

A

O - Medial epicondyle of humerus (common flexor origin)

I - Base of second metacarpal

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2
Q

Palmaris Longus

A

O - Medial epicondyle of humerus (common flexor origin)

I - Distal-half of flexor retinaculum, and apex of palmar aponeurosis

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3
Q

Flexor Carpi Ulnaris

A

O - Humeral Head: medial epicondyle of humerus (common flexor origin); Ulnar Head: olecranon & posterior surface via aponeurosis
I - Pisiform, hook of hamate, and base of fifth metacarpal

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4
Q

Flexor Digitorum Superficialis

A

O - Humeroulnar Head: medial epicondyle of humerus (common flexor origin), and coronoid process of ulna; Radial Head: superior half of anterior border of radius
I - Shafts of middle phalanges of the 4 medial digits

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5
Q

Flexor Policis Longus

A

O - Anterior surface of radius, and interosseus membrane

I - Base of distal phalanx of thumb

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6
Q

Flexor Digitorum Profundus

A

O - Proximal 3/4 of medial and anterior surfaces of ulna, and interosseus membrane
I - Medial Head: bases of distal phalanges of 4th & 5th digits; Lateral Head: bases of distal phalanges of 2nd & 3rd digits

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7
Q

Pronator Quadratus

A

O - Distal quarter of anterior ulnar shaft

I - Distal quarter of anterior radial shaft

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8
Q

Extensor Carpi Radialis Longus

A

O - Lateral supraepicondylar ridge of humerus

I - Dorsal aspect of base of second metacarpal

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9
Q

Extensor Carpi Radialis Brevis

A

O - Lateral epicondyle of humerus (common extensor origin)

I - Dorsal aspect of base of third metacarpal

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10
Q

Extensor Digitorum

A

O - Lateral epicondyle of humerus (common extensor origin)

I - Distal phalanges of fingers 2-5 via tendon-extension

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11
Q

Extensor Carpi Ulnaris

A

O - Lateral epicondyle of humerus, and posterior border of ulna via shared aponeurosis
I - Dorsal aspect of base of fifth metacarpal

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12
Q

Abductor Pollicis Longus

A

O - Posterior surface of middle-halves of radius, ulna, and interosseus membrane
I - Base of first metacarpal and trapezium

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13
Q

Extensor Pollicis Brevis

A

O - Posterior surface of distal-third of radius and interosseus membrane
I - Dorsal aspect of base of proximal phalanx of thumb

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14
Q

Extensor Pollicis Longus

A

O - Posterior surface of middle-third of ulna and interosseus membrane
I - Dorsal aspect of base of distal phalanx of thumb

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15
Q

Extensor Indicis

A

O - Posterior surface of distal-third of ulna, and interosseus membrane
I - Distal phalanx of second digit via tendon-expansion

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16
Q

Abductor Pollicis Brevis

A

O - Flexor retinaculum and tubercles of scaphoid and trapezium
I - Lateral base of thumb’s proximal phalanx

17
Q

Flexor Pollicis Brevis

A

O - Flexor retinaculum and tubercles of scaphoid and trapezium
I - Lateral base of proximal phalanx of thumb

18
Q

Opponens Pollicis

A

O - Flexor retinaculum and tubercles of scaphoid and trapezium
I - Lateral side of first metacarpal

19
Q

Adductor Pollicis

A

O - Oblique Head: bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals; Transverse Head: anterior surface of shaft of 3rd metacarpal
I - Medial base of proximal phalanx of thumb

20
Q

Abductor Digiti Minimi

A

O - Pisiform bone

I - Medial side of proximal phalanx of little finger

21
Q

Flexor Digiti Minimi Brevis

A

O - Hook of hamate bone, and flexor retinaculum

I - Medial side of proximal phalanx of little finger

22
Q

Opponens Digiti Minimi

A

O - Hook of hamate bone, and flexor retinaculum

I - Medial side of fifth metacarpal

23
Q

Lumbricals

A

O - 1st & 2nd: flexor digitorum profundus, as unipennate muscles; 3rd & 4th: flexor digitorum profundus, as bipennate muscles
I - Lateral sides of extensor expansions of digits 2-5

24
Q

Palmar Interossei

A

O - Palmar surfaces of 2nd, 4th, and 5th metacarpals, as unipennate muscles
I - Bases of proximal phalanges, and 2nd, 4th, and 5th digits (distal) via tendon-expansion

25
Q

Dorsal Interossei

A

O - Adjacent sides of two metacarpals, as bipennate muscles

I - Bases of proximal phalanges, and 2nd-4th digits (distal) via tendon-expansion

26
Q

Extensor Digiti Minimi

A

O - Lateral epicondyle of humerus (common extensor origin)

I - Extensor expansion of 5th digit (i.e. middle and distal phalanges of digit)

27
Q

Palmaris Brevis

A

O - medial portion of palmar aponeurosis + flexor retinaculum
I - skin in hypothenar region

28
Q

What are the compartments of the hand?

A 
Thenar
Hypothenar
Central
Adductor
Interosseus

ACTM Myology (14 decks)

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