Prac Exam 1

Question 1

Define a colles fracture.

Answer 1

radiolucent transverse fracture of the distal aspect of the radius

Question 2

How does one obtain a colles fracture?

Answer 2

commonly due to a fall on a hyperextended/outstretched hand with a pronated forearm in dorsiflexion
scaphoid and lunate push against radius

Question 3

Osteology of the forearm: what bone is more medial?

Answer 3

ulna

Question 4

Osteology of the forearm: what bone has the olecranon and coronoid process?

Answer 4

ulna

Question 5

What are the eight carpal bones? Proximal = lateral to medial then distal =medial to lateral

Answer 5

scaphoid, lunate, triquetrum, pisiform

hamate, capitate, trapezoid, trapezium

Question 6

Injury to what nerve can occur with colles fracture?

Answer 6

an incomplete lesion of the median nerve can occur

sometimes lesions of the superficial branch of the radial nerve or compression of the ulnar nerve

Question 7

What pulse can be affected with a colles fracture?

Answer 7

radial nerve pulse

Question 8

Thumb movement and innervation: what muscle causes flexion?

Answer 8

flexor pollicis longus (IPJ)

Question 9

Thumb movement and innervation: what muscle causes extension of the IPJ?

Answer 9

extensor pollicis longus (C7 and C8)

Question 10

Thumb movement and innervation: what muscle causes extension of the MCPJ?

Answer 10

extensor pollicis brevis (C7 and C8)

Question 11

Thumb movement and innervation: what muscle causes abduction?

Answer 11

abductor pollicis longus (C7 and C8)

Question 12

Thumb movement and innervation: what muscle causes adduction?

Answer 12

adductor pollicis (C7 and C8)

Question 13

DRAW THE BRACHIAL PLEXUS

Answer 13

good job

Question 14

Nerve root: dorsal scapular nerve?

Answer 14

C5

Question 15

Nerve root: suprascapular nerve?

Answer 15

C5 + C6

Question 16

Nerve root: long thoracic nerve?

Answer 16

C5 + C6 + C7

Question 17

Nerve root: radial nerve?

Answer 17

C5 + C6 + C7 + C8 + T1

Question 18

Nerve root: musculocutaneous nerve?

Answer 18

C5 + C6

Question 19

Nerve root: median nerve?

Answer 19

C6

Question 20

Nerve root: ulnar nerve?

Answer 20

C8 + T1

Question 21

What nerves arise from the roots?

Answer 21

dorsal scapular N and long thoracic

Question 22

What nerve arises from the trunk?

Answer 22

suprascapular

Question 23

Shoulder muscle motor movement + innervation: abduction?

Answer 23

rotator cuff (SIT,S)
supraspinatus muscle, the infraspinatus muscle, teres minor muscle, and the subscapularis muscle.

Question 24

Shoulder muscle motor movement + innervation: adduction?

Answer 24

rhomboids

Question 25

Shoulder muscle motor movement + innervation: elevation/retraction?

Answer 25

trapezoids

Question 26

Forearm muscle motor movement + innervation: pronation?

Answer 26

pronator teres (median, C6)

Question 27

Forearm muscle motor movement + innervation: supination?

Answer 27

``` pronator quadratus (anterior interosseous, C6 AND supinator (posterior interosseous, C6, 7, 8) ```

Question 28

Elbow muscle motor movement + innervation: flexion?

Answer 28

brachio-radialis (radial N, all nerve roots)

Question 29

Elbow muscle motor movement + innervation: extension?

Answer 29

anconeus (radial)

Question 30

Wrist muscle motor movement + innervation: flexion?

Answer 30

flexor carpi ulnaris (ulnar) AND flexor carpi radialis (radial)

Question 31

Wrist muscle motor movement + innervation: extension?

Answer 31

``` extensor carpi ulnaris (posterior interosseous N, C6 + 7) AND extensor carpi radialis (radial) AND extensor carpi brevis (radial) ```

Question 32

Hand muscle motor movement + innervation: tighten palmar fascia?

Answer 32

palmaris longus (median)

Question 33

Hand muscle motor movement + innervation: extends index finger?

Answer 33

extensor indicis

Question 34

Hand muscle motor movement + innervation: extension of fingers?

Answer 34

extensor digitorum communis (posterior interosseous, C7 + 8)

Question 35

Hand muscle motor movement + innervation: "rolling up of fingers"?

Answer 35

flexor digitorum profundus (anterior interosseous nerve for lateral 2 and ulnar nerve for medial 2 fingers AND flexor digitorum superficialis (median N C7 + 8)

Question 36

What nerve is effected in the following palsy condition: wrist drop?

Answer 36

radial N (all nerve roots)

Question 37

What nerve is effected in the following palsy condition: winged scapula?

Answer 37

long thoracic (C5, 6, 7)

Question 38

What nerve is effected in the following palsy condition: atrophy of the thenar eminence?

Answer 38

median nerve (C6)

Question 39

What nerve is effected in the following palsy condition: carpal tunnel syndrome?

Answer 39

median nerve (C6)

Question 40

What nerve is effected in the following palsy condition: claw hand?

Answer 40

ulnar nerve (C6, 7)