Dermatomes and Reflexes

Question 1

C2

Answer 1

posterior half of skull - skull cap.

Question 2

C3

Answer 2

high turtleneck shirt

Question 3

C4

Answer 3

Low collar shirt

Question 4

C5

Answer 4

Below the collarbones, down the lateral arms.

Question 5

C6-7-8

Answer 5

Dorsal arms

Question 6

T1

Answer 6

Little bit of arm!

Question 7

T4

Answer 7

at the nipple

Question 8

T7

Answer 8

xiphoid process

Question 9

T10

Answer 9

umbilicus (appendicitis)

Question 10

L1

Answer 10

inguinal ligament

Question 11

L4

Answer 11

kneecaps

Question 12

S2,3,4

Answer 12

erection/sensation of penis/anal zones

Question 13

Achilles reflex

Answer 13

S1,2 buckle my shoe.

Question 14

Patellar reflex

Answer 14

L3,4 kick the door.

Question 15

Biceps reflex

Answer 15

C5,6 pick up sticks.

Question 16

Triceps reflex

Answer 16

C7,8 lay them straight.

Question 17

Cremaster reflex

Answer 17

L1, L2, testicles move.

Question 18

Anal wink reflex

Answer 18

S3, S4, winks galore.

Question 19

When do primitive reflexes disappear by?

Answer 19

Usually by 1st yr of life.

Question 20

What can cause primitive reflexes to reemerge?

Answer 20

Frontal lobe lesions.

Question 21

Moro reflex

Answer 21

Hang on for life reflex - abduct/extend arms when startled, then draw together

Question 22

Rooting reflex

Answer 22

Movement of head toward one side if cheek or mouth is stroked - nipple seeking

Question 23

Sucking reflex

Answer 23

Sucking response if roof of mouth is touched

Question 24

Palmar reflex

Answer 24

Curling of fingers if palm is stroked.

Question 25

Plantar reflex

Answer 25

Dorsiflexion of large toe and fanning of other toes w/ plantar stimulation (upgoing babinski - UMN lesion in adult)

Question 26

Galant reflex

Answer 26

Stroke along one side of spine while newborn is face down; lateral flexion of body towards stimulated side.