Dermatomes, Myotomes, & Reflexes

Question 1

Dermatome: C2

Answer 1

posterior head

Question 2

Dermatome: C3

Answer 2

posterior lateral neck

Question 3

Dermatome: C4

Answer 3

acromioclavicular joint

Question 4

Dermatome: C5

Answer 4

lateral arm

Question 5

Dermatome: C6

Answer 5

lateral forearm & thumb

Question 6

Dermatome: C7

Answer 6

palmar distal phalanx of middle finger

Question 7

Dermatome: C8

Answer 7

little finger & ulnar border of hand

Question 8

Dermatome: T1

Answer 8

medial forearm

Question 9

Dermatome: L2

Answer 9

anterior thigh

Question 10

Dermatome: L3

Answer 10

middle third of anterior thigh

Question 11

Dermatome: L4

Answer 11

patella & medial malleolus

Question 12

Dermatome: L5

Answer 12

fibular head & dorsum of foot

Question 13

Dermatome: S1

Answer 13

lateral & plantar aspect of foot

Question 14

Dermatome: S2

Answer 14

medial aspect of posterior thigh

Question 15

Dermatome: S3-S5

Answer 15

perianal area

Question 16

Dermatome testing procedures (4)

Answer 16

instruct pt. first
occlude vision
compare bilaterally
use cotton/pin for dull/sharp

Question 17

Myotome Muscle Group: C1

Answer 17

cervical rotation

Question 18

Myotome Muscle Group: C2

Answer 18

shoulder elevation

Question 19

Myotome Muscle Group: C5-C6

Answer 19

biceps/elbow flexors

Question 20

Myotome Muscle Group: C6

Answer 20

wrist extensors

Question 21

Myotome Muscle Group: C7 (2)

Answer 21

wrist flexors
elbow extensors

Question 22

Myotome Muscle Group: C8

Answer 22

thumb extension

Question 23

Myotome Muscle Group: T1

Answer 23

finger adductors

Question 24

Myotome Muscle Group: L2

Answer 24

hip flexors

Question 25

Myotome Muscle Group: L3

Answer 25

knee extensors

Question 26

Myotome Muscle Group: L4

Answer 26

ankle dorsiflexors

Question 27

Myotome Muscle Group: L5

Answer 27

great toe extensors

Question 28

Myotome Muscle Group: S1

Answer 28

plantar flexors

Question 29

Myotome Muscle Group: S1-S5

Answer 29

bowel & bladder

Question 30

Biceps Tendon Reflex

Answer 30

strike through thumb (inside elbow) biceps muscle contracts

Question 31

Brachoradialis Tendon Reflex

Answer 31

strike 1-2 in from wrist (radial) brachioradialis muscles contracts (elbow flex/forearm supinate)

Question 32

Triceps Tendon Reflex

Answer 32

(reverse goalpost) strike tendon above elbow triceps muscle contracts

Question 33

Patellar Tendon Reflex

Answer 33

strike tendon inferior to patella quadriceps contraction (w/ knee extension)

Question 34

Achilles Tendon Reflex

Answer 34

strike Achilles tendon in supported dorsiflex plantarflexion contraction

Question 35

where are cell bodies of sensory/afferent nerves?

Answer 35

dorsal root ganglion

Question 36

where are cell bodies of motor/efferent nerves?

Answer 36

anterior horn of spinal cord

Question 37

which lobe is responsible for intellect, personality & higher exec. function?

Answer 37

frontal lobe

Question 38

which lobe is responsible for sensation, language, spatial/visual perception?

Answer 38

parietal lobe

Question 39

which lobe is responsible for auditory/smell processing, behavior, LT memory & social understanding?

Answer 39

temporal lobe

Question 40

which lobe is responsible for vision & judging distance?

Answer 40

occipital lobe

Question 41

where are the cell bodies of upper motor neurons?

Answer 41

cerebral cortex

Question 42

where is the sympathetic chain ganglia?

Answer 42

the thorax

Question 43

where does the corticospinal tract cross?

Answer 43

medulla

Question 44

corticospinal tract: type of movement & which neurons?

Answer 44

voluntary movement upper & lower motor neurons

Question 45

L4 Reflex

Answer 45

patellar tendon reflex

Question 46

S1 Reflex

Answer 46

Achilles tendon reflex

Question 47

C5 Reflex

Answer 47

biceps tendon reflex

Question 48

C7 Reflex

Answer 48

triceps tendon reflex

Question 49

C6 Reflex

Answer 49

brachioradialis reflex

Question 50

Myotome Muscle Group: C4

Answer 50

shoulder abduction (deltoid)