MRS Tests

Question 1

Middle deltoid muscle test

Answer 1

Nerve root: C5; Peripheral nerve: axillary

Question 2

Biceps muscle test

Answer 2

Nerve root: C6; Peripheral nerve: musculocutaneous

Question 3

Triceps muscle test

Answer 3

Nerve root: C7; Peripheral nerve: radial

Question 4

Wrist extensors muscle test

Answer 4

Nerve root: C6; Peripheral nerve: radial

Question 5

Wrist flexors muscle test

Answer 5

Nerve root: C7; Peripheral nerve: median/ulnar

Question 6

Finger extensors muscle test

Answer 6

Nerve root: C7; Peripheral nerve: ulnar/median

Question 7

Finger flexors muscle test

Answer 7

Nerve root: C8; Peripheral nerve: ulnar/median

Question 8

Finger add/ab muscle test

Answer 8

Nerve root: T1; Peripheral nerve: ulnar

Question 9

Muscles for C6

Answer 9

biceps; wrist extensors

Question 10

Muscles for C7

Answer 10

triceps; wrist flexors; finger extensors

Question 11

C5 DRT

Answer 11

biceps

Question 12

C6 DRT

Answer 12

brachioradialis

Question 13

C7 DRT

Answer 13

triceps

Question 14

C5 sensory test

Answer 14

Over deltoid tuberosity

Question 15

C6 sensory test

Answer 15

thumb

Question 16

C7 sensory test

Answer 16

Middle finger

Question 17

C8 sensory test

Answer 17

pinky

Question 18

T1 sensory test

Answer 18

Medial forearm at level of elbow

Question 19

T2 sensory test

Answer 19

Medial upper arm (axilla region)

Question 20

interpreting muscle problems (upper vs lower nerve root)

Answer 20

upper: spastic
lower: weakness

Question 21

interpreting reflex problems (upper vs lower nerve root)

Answer 21

upper: hyperreflexive
lower: hyporelexive

Question 22

interpreting sensation problems (upper vs lower nerve root)

Answer 22

no set rule; problem if sharp is not detected