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SHB Exam 1 > Forearm > Flashcards

Flashcards in Forearm Deck (25):
1

Brachioradialis innervation and action?

- Radial n.
- Weak flexion of forearm when forearm is mid-pronated

2

Flexor carpi radialis m. innervation and action?

- Median n.
- Flexes and abducts hand at wrist

3

Palmaris longus m. innervation and action?

- Median n.
- Flexes hand at wrist, tenses palmar aponeurosis

4

Flexor digitorum superficialis m. innervation and action?

- Median n.
- Flexes middle and proximal phalanges (not pollux), flexes hand at wrist

5

Flexor carpi ulnaris m. innervation and action?

- Ulnar n.
- Flexes and adducts hand at wrist

6

Flexor pollicis longus m. innervation and action?

- Median n.
- Flexes phalanges of thumb

7

Flexor digitorum profundus m. innervation and action?

- Lateral 1/2 is medial n., medial 1/2 is ulnar n.
- Flexes distal phalanges (not pullux), assists w/flexion of the hand at wrist

8

Pronator quadratus m. innervation and action?

- Median n.
- Pronates forearm

9

Extensor carpi radialis longus m. innervation and action?

- Radial n.
- Extends and abducts hand at wrist

10

Extensor carpi radialis brevis m. innervation and action?

- Radial n.
- Extends and abducts hand at wrist

11

Extensor digitorum m. innervation and action?

- Radial n.
- Extends digits (not hallux), assists in wrist extension

12

Extensor digiti minimi m. innervation and action?

- Radial n.
- Extends 5th digit

13

Extensor carpi ulnaris m. innervation and action?

- Radial n.
- Extends and adducts hand at wrist

14

Anconeus m. innervation and action?

- Radial n.
- Assists triceps in extending elbow, abducts ulna in pronation

15

Abductor pollicis longus m. innervation and action?

- Radial n.
- Abduct and extend thumb at carpo-metacarpal joint

16

Extensor pollicis brevis m. innervation and action?

- Radial n.
- Extends proximal phalanx of thumb at carpo-metacarpal joint

17

Extensor indicis m. innervation and action?

- Radial n.
- Extends index finger (2nd digit), helps extend hand at wrist

18

What tendons define the anatomical snuff box?

Abductor pollicis longus and extensor pollicis brevis tendons laterally and extensor pollicis longus tendon medially

19

What m. of the forearm does the radial a. run under for most of its journey distally?

Brachioradialis m.

20

What vessels/nerves enter the hand via the Canal of Guyon?

Ulnar a. and ulnar n.

21

The median n. enters the forearm b/w the heads of what m.? Which mm. does the medial n. continue to run b/w?

- Pronator teres m.
- Flexor digitorum superficialis and flexor carpi radialis mm.

22

The anterior interosseous n. branches from what nerve?

Median n.

23

The ulnar n. enters the forearm behind what boney feature and then pierces what muscle?

- Medial epicondyle
- Flexor carpi ulnaris m.

24

What m. of the forearm does the superficial branch of the radial a. run under for most of its journey distally?

Brachioradialis m. (for distal 1/3 of journey, it crosses to dorsum)

25

What m. of the forearm does the deep branch of the radial n. (posterior interosseous n.) pass through?

Supinator m. (hint: deep penetration needed to kill supinator)