Lab 4 Flashcards Preview

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Flashcards in Lab 4 Deck (12)
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1
Q

What is this muscle? List the origin, insertion, innervation, and action.

A

Anconeus

O: lateral epicondyle of the humerus

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

N: radial

A: extension of forearm, stabilization of elbow joint

2
Q

What muscle is this? List the origin, insertion, innervation, action.

A

Extensor Radialis Longus

O: lateral supracondylar ridge

I: base of 2nd metacarpal

N: radial

A: extension and abduction of hand at the wrist

3
Q

What muscle is this? List the origin, insertion, innervation, and action.

A

Extensor Capri Radialis Brevis

O: lateral epicondyle

I: base of 3rd metacarpal

N: deep branch of radial nerve

A: extension and abduction of the hand at the wrist

4
Q

What muscle is this? List the origin, insertion, innervation, and action.

A

Extensor Digitorum

O: lateral epicondyle

I: extensor expansion of medial 4 digits

N: posterior interosseous

A: extension of medial 4 digits at MCP, and extension at IP joint, extension at wrist

5
Q

What muscle is this? List the origin, insertion, innervation, action.

A

Extensor digiti minimi

O: lateral epicondyle

I: extensor expansion of 5th digit

N: posterior interosseous

A: extension of 5th digit at MCP, extension at IP, extension at wrist

6
Q

What muscle is this? List the origin, insertion, innervation, and action.

A

Extensor capri ulnaris

O: lateral epicondyle, posterior border of ulna via aponeurosis

I: base of 5th metacarpal

N: posterior interosseous

A: extension and adduction of hand at wrist

7
Q

Where is the supinator? List the origin, insertion, innervation, and action.

A

O: lateral epicondyle, supinator fossa, crest of ulna

I: lateral, posterior, anterior surface of proximal 3rd radius

N: deep branch of radial nerve

A: supination of the forearm

8
Q

What muscle is this? List the origin, insertion, innervation, and action.

A

Extensor Indicis

O: posterior surface of ulna, interosseous membrane

I: extensor expansion of 2nd digit

N: posterior interosseous

A: extension at the MCP, extension at IP, extension of hand at wrist

9
Q

What muscle is this? List the origin, insertion, innervation, action.

A

Abductor pollicis longus

O: posterior surface of ulna and radius, interosseous membrane

I: base of 1st metacarpal

N: posterior interosseous

A: abduction of 1st digit, extension at MCP, extension at wrist

10
Q

Where is the extensor pollicis longus? List the origin, insertion, innervation, action.

A

O: posterior surface of middle 3rd ulna, interosseous membrane

I: base of distal phalanx of 1st digit

N: posterior interosseous

A: extension of MCP and IP joints, extension at wrist

11
Q

Where is the extensor pollicis brevis? LIst the origin, insertion, innervation, and action.

A

O: posterior surface of the radius, interosseous membrane

I: base of proximal phalanx of 1st digit

N: posterior interosseous

A: extension of MCP joint

12
Q

What does this show? Which muscles make the boundaries?

A

Anatomical snuff box

lateral: extensor pollicis brevis
medial: extensor pollicis longus