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Anatomy > Posterior Forearm Muscles > Flashcards

Posterior Forearm Muscles Flashcards

1
Q

What is the MA of the Extensor Carpi Radialis Longus and Brevis (ECRL & ECRB)?

A

Extension and radial deviation of the wrist (radiocarpal joint)

ECRL active during fist clenching

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2
Q

What is the PA of the Extensor Carpi Radialis Longus and Brevis (ECRL & ECRB)?

A

ECRL: lateral supra-epicondylar ridge of humerus

ECRB: lateral epicondyle of humerus (common extensor tendon)

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3
Q

What is the DA of the Extensor Carpi Radialis Longus and Brevis (ECRL & ECRB)?

A

ECRL: base of 2nd metacarpal

ECRB: base of 3rd metacarpal

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4
Q

What is the N for the Extensor Carpi Radialis Longus and Brevis (ECRL & ECRB)?

A

Radial nerve (C6, C7, & C8)

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5
Q

What is the MA of the Extensor Digitorum (ED)?

A

Extension of the medial 4 digits (no thumb) at the metacarpophalangeal joint (1) and interphalangeal joints (2)

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6
Q

What is the PA of the Extensor Digitorum (ED)?

A

Lateral epicondyle of the humerus (common extensor tendon)

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7
Q

What is the DA of the Extensor Digitorum (ED)?

A

Extensor expansions of medial 4 digits

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8
Q

What is the N for the Extensor Digitorum (ED)?

A

Radial nerve (C7 & C8)

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9
Q

What is the MA of the Extensor Digiti Minimi (EDM)?

A

Extension of the 5th digit (pinky) at metacarpophalangeal joint (1) and interphalangeal joints (2)

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10
Q

What is the PA of the Extensor Digiti Minimi (EDM)?

A

Lateral epicondyle of humerus (common extensor origin)

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11
Q

What is the DA of the Extensor Digiti Minimi (EDM)?

A

Extensor expansion of 5th digit

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12
Q

What is the N for the Extensor Digiti Minimi (EDM)?

A

Radial nerve (C7 & C8)

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13
Q

What is the MA of the Extensor Carpi Ulnaris (ECU)?

A

Extension and ulnar deviation of the wrist (radiocarpal joint)

Active during fist clenching

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14
Q

What is the PA of the Extensor Carpi Ulnaris (ECU)?

A

Lateral epicondyle of humerus (common extensor tendon)

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15
Q

What is the DA of the Extensor Carpi Ulnaris (ECU)?

A

Base of 5th metacarpal

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16
Q

What is the N for the Extensor Carpi Ulnaris (ECU)?

A

Radial nerve (C7 & C8)

17
Q

What is the MA of the Supinator?

A

Supination of the forearm (radioulnar joint)

18
Q

What is the PA of the Supinator?

A

Lateral epicondyle of humerus, radial collateral ligament, and annular ligament

19
Q

What is the DA of the Supinator?

A

Lateral radius

20
Q

What is the N for the Supinator?

A

Radial nerve (Posterior Interosseous Nerve) (C7 & C8)

21
Q

What is the MA of the Extensor Indicis (EI)?

A

Extension of the 2nd digit at the metacarpophalangeal joint

May assist with wrist extension (radiocarpal joint)

22
Q

What is the PA of the Extensor Indicis (EI)?

A

Posterior ulna and interosseous membrane

23
Q

What is the DA of the Extensor Indicis (EI)?

A

Extensor expansion of 2nd digit

24
Q

What is the N for the Extensor Indicis (EI)?

A

Radial nerve (Posterior Interosseous Nerve) (C7 & C8)

25
Q

What is the MA of the Abductor Pollicis Longus (APL)?

A

Radial abduction and extension of the thumb at the carpometacarpal joint

26
Q

What is the PA of the Abductor Pollicis Longus (APL)?

A

Posterior surface of:
ulna
radius
interosseous membrane

27
Q

What is the DA of the Abductor Pollicis Longus (APL)?

A

Base of 1st metacarpal

28
Q

What is the N for the Abductor Pollicis Longus (APL)?

A

Radial nerve (Posterior Interosseous Nerve) (C7 & C8)

29
Q

What is the MA of the Extensor Pollicis Longus and Brevis (EPL & EPB)?

A

Extension of the thumb at the metacarpophalangeal and carpometacarpal joints

EPL does extension of the thumb at the interphalangeal joint

30
Q

What is the PA of the Extensor Pollicis Longus and Brevis (EPL & EPB)?

A

EPL: posterior ulna and interosseous membrane

EPB: posterior radius and interosseous membrane

31
Q

What is the DA of the Extensor Pollicis Longus and Brevis (EPL & EPB)?

A

EPL: base of distal phalanx of thumb (including thumb nail)

EPB: base of proximal phalanx of thumb (not including thumb nail)

32
Q

What is the N for the Extensor Pollicis Longus and Brevis (EPL & EPB)?

A

Radial nerve (Posterior Interosseous Nerve) (C7 & C8)

Anatomy (29 decks)

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