Dermatomes, Myotomes, Reflexes

Question 1

What is a dermatome

Answer 1

dermatome is an area of skin supplied by a single nerve root

Question 2

C1 dermatome

Answer 2

Vertex of the skull

Question 3

C2

Answer 3

posterior head

Question 4

C3

Answer 4

posterior lateral neck

Question 5

C4

Answer 5

acromioclavicular joint

Question 6

C5

Answer 6

lateral arm

Question 7

C6

Answer 7

lateral forarm and thumb

Question 8

C7

Answer 8

palmar distal phalanx , middle finger

Question 9

C8

Answer 9

little finger and ulnar border of hand

Question 10

T1

Answer 10

medial forearm

Question 11

T2

Answer 11

medial side of upper arm to medial elbow , pec and mid scapular area

Question 12

T3-T6

Answer 12

Upper thorax

Question 13

T5-T7

Answer 13

costal margin

Question 14

T8-T12

Answer 14

abdomen and lumbar region

Question 15

L1

Answer 15

back trochanter, groin

Question 16

L2

Answer 16

back, front of the thigh too knee

Question 17

L3

Answer 17

back, upper buttock, anterior thigh and knee medial lower leg

Question 18

L4

Answer 18

Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe

Question 19

L5

Answer 19

Buttock, posterior and lateral thigh, lateral
aspect of leg, dorsum of foot, medial half of
sole, first, second, and third toes

Question 20

S1

Answer 20

buttock, thigh, and leg posterior

Question 21

S2

Answer 21

Same as S1 (Buttock, thigh, and leg posterior)

Question 22

S3

Answer 22

Groin, medial thigh to knee

Question 23

S4

Answer 23

Perineum, genitals, lower sacrum

Question 24

What is a myotome

Answer 24

group of muscles innervated by a single spinal nerve root.

Question 25

C1-C2

Answer 25

Cervical flexion

Question 26

C3

Answer 26

side flexion

Question 27

C4

Answer 27

shoulder elevation

Question 28

C5

Answer 28

Shoulder abduction

Question 29

C6

Answer 29

Elbow flexion and wrist

extension

Question 30

C7

Answer 30

Elbow extension and wrist

flexion

Question 31

C8

Answer 31

Thumb extension

Question 32

T1

Answer 32

finger abduction

Question 33

L1-L2

Answer 33

hip flexion

Question 34

L3

Answer 34

Knee extension

Question 35

L4

Answer 35

Ankle dorsiflexion

Question 36

L5

Answer 36

big toe extension

Question 37

S1

Answer 37

ankle eversion and plantar flexion, hip extension

Question 38

S2

Answer 38

ankle eversion and plantar flexion, hip extension

Question 39

S3

Answer 39

No specific test action; intrinsic foot muscles

(except abductor hallucis)

Question 40

How do you grade a DTR

Answer 40

0-4+

normal is 2

Question 41

DTR scale

Answer 41

0 = No Response, always abnormal
1+ = Slight reflex, present but depressed, low normal
2+ = Normal, typical reflex
3+ = Brisk reflex, possibly but not necessarily abnormal
4+ = Very brisk reflex, abnormal, clonus

Question 42

Bicep DTR

Answer 42

C5-C6

Question 43

Brachioradialis BTR

Answer 43

C5-C6

Question 44

Triceps DTR

Answer 44

C7-C8

Question 45

Patellar DTR

Answer 45

L2-L4

Question 46

Achilles Tendon DTR

Answer 46

S1-S2

Question 47

Hamstrings DTR

Answer 47

L5-S2