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anatomy > muscles of the carpal and digital joints > Flashcards

muscles of the carpal and digital joints Flashcards

1
Q

M. extensor carpi radialis origin?

A

Crista supracondylaris lateralis of the humerus.

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2
Q

M. extensor carpi radialis Insertion?

A

Proximo-dorsal ends of McII and McIII.

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3
Q

M. extensor carpi radialis Function?

A

Extension of the carpus; flexion of the elbow joint.

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4
Q

M. extensor digitorum communis origin?

A

Lateral epicondyle of the humerus.

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5
Q

M. extensor digitorum communis Insertion?

A

Dorsal aspect of the Crista unguicularis (P3).

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6
Q

M. extensor digitorum communis Function?

A

Extension of the carpus and digits II-V.

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7
Q

M. extensor digitorum lateralis origin?

A

Lateral epicondyle of the humerus

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8
Q

M. extensor digitorum lateralis Insertion?

A

Dorsal aspect of the Crista unguicularis (P3) via the tendons of the M. extensor
digitorum communis.

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9
Q

M. extensor digitorum lateralis Function?

A

Extension of digits III-V.

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10
Q

M. extensor carpi ulnaris [M. ulnaris lateralis] origin?

A

Lateral epicondyle of the humerus.

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11
Q

M. extensor carpi ulnaris [M. ulnaris lateralis] Insertion?

A

Proximo-lateral end of McV and accessory carpal bone.

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12
Q

M. extensor carpi ulnaris [M. ulnaris lateralis] Function?

A

Flexion of the carpus.

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13
Q

M. extensor digiti I et II [M. extensor pollicus longus et indicis proprius]

A

This thread-like muscle lies deep to the common and lateral digital extensors and the M.
extensor carpi ulnaris. It is of no practical importance and is only mentioned for the sake of
completeness.
Origin: Cranio-lateral border of the ulna.
Insertion: One tendon ends in the fascia at the distal end of McI; the other joins the
tendon of the common digital extensor to digit II.
Function: Extension of the digits I and II.

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14
Q

M. abductor digiti I longus [M. abductor pollicis longus] Origin?

A

Lateral surfaces of the radius and ulna.

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15
Q

M. abductor digiti I longus [M. abductor pollicis longus] Insertion?

A

Proximo-medial end of McI. There is a sesamoid bone in the tendon of insertion.

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16
Q

M. abductor digiti I longus [M. abductor pollicis longus] Function?

A

Abduction of digit I.

17
Q

M. flexor carpi radialis Origin?

A

Medial epicondyle of the humerus.

18
Q

M. flexor carpi radialis Insertion?

A

Proximo-palmar ends of McII and McIII

19
Q

M. flexor carpi radialis Function?

A

Flexion of the carpus

20
Q

M. flexor digitorum Superficialis Origin?

A

Medial epicondyle of humerus.

21
Q

M. flexor digitorum Superficialis Insertion?

A

Palmar tubercules proximally on P2 of digits II-V

22
Q

M. flexor digitorum Superficialis Function?

A

Flexion of the metacarpophalangeal joint and proximal interphalangeal joint
(i.e. between PI and P2) of digits II-V; flexion of the carpus.

23
Q

M. flexor carpi ulnaris Origin?

A

Caput ulnare: Medial surface of the Olecranon.

Caput humerale: Medial epicondyle of the humerus

24
Q

M. flexor carpi ulnaris Insertion?

A

Distal end of the Os carpi accessorium.

25
Q

M. flexor carpi ulnaris Function?

A

Flexion of the carpus; passive support of the carpus and prevention of
excessive over-extension when weight bearing.

26
Q

M. flexor digitorum profundus Origin?

A

Caput humerale: Medial epicondyle of humerus.
Caput radiale: Caudo-medial aspect of radius.
Caput ulnare: Caudal border of the ulna.

27
Q

M. flexor digitorum profundus Insertion?

A

Tuberculum flexorium of P3 of digits I-V.

28
Q

M. flexor digitorum profundus Function?

A

Flexion of the digits (all joints) and carpus

29
Q

Mm. interossei Origin?

A

Palmar carpal fibrocartilage and proximo-palmar ends of McII-V.

30
Q

Mm. interossei Insertion?

A

Proximo-palmar ends of P1 of digits II-V.

31
Q

Mm. interossei Function?

A

Flexion of the metacarpophalangeal joint.

32
Q

what is the name of the fasia surraunding the carpus

A

retinaculum extensorum and flexsorum

anatomy (20 decks)

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