Landmark dermatomes and clinical reflexes 0425

Question 1

C2

Answer 1

posterior half of skull “cap”

Question 2

C3

Answer 2

high turtleneck shirt

Question 3

C4

Answer 3

low collar shirt

Question 4

T4

Answer 4

nipple

Question 5

T7

Answer 5

xiphoid process

Question 6

T10

Answer 6

umbilicus

*early appendicitis referred pain

Question 7

L1

Answer 7

inguinal ligament

Question 8

L4

Answer 8

includes kneecaps

Question 9

S2,3,4

Answer 9

erection and sensation of penile and anal zones

Question 10

phrenic nerve

Answer 10

diaphragm and gallbladder pain referred to RIGHT shoulder via phrenic nerve

Question 11

Achilles reflex

Answer 11

S1 nerve root

[S1,2]

Question 12

patellar reflex

Answer 12

L4 nerve root

[L3,4]

Question 13

biceps reflex

Answer 13

C5 nerve root

[C5,6]

Question 14

triceps reflex

Answer 14

C7 nerve root

[C7,8]

Question 15

babinski reflex

Answer 15

dorsiflexion of big toe and fanning (extension) of other toes.

normal reflex in 1st year of life.
sign of UMN lesion after that.

Question 16

moro reflex

Answer 16

primitive reflex.

“hang on for life” - abduct/extend limbs when startled, then draw together.

Question 17

rooting reflex

Answer 17

primitive reflex.

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

Question 18

sucking reflex

Answer 18

primitive reflex.

sucking response when roof of mouth is touched.

Question 19

palmar reflex

Answer 19

primitive reflex.

curling of fingers if palm of hand is stroked

Question 20

babinski reflex

Answer 20

primitive reflex.
dorsiflexion of big toe and fanning of other toes with plantar stimulation.
aka plantar reflex.

Question 21

galant reflex

Answer 21

primitive reflex.
stroking along one side of spine while newborn is in ventral suspension (face down) causes lateral flexion of lower body toward stimulated side.

Question 22

general feature of primitive reflexes

Answer 22

normally disappear within 1st year of life.

may reemerge with FRONTAL lobe lesion.