Landmark dermatomes and reflexes

Question 1

C2

Answer 1

Posterior half of a skull cap

Question 2

C3

Answer 2

high turtleneck shirt

Question 3

C4

Answer 3

low collar shirt

Question 4

T4

Answer 4

at the nipple

“T4 at the teat pore”

Question 5

T7

Answer 5

the xiphoid process

Because 7 sticks out like the xiphoid process

Question 6

T10

Answer 6

at the umbilicus

“T10 at the belly butTEN”

Question 7

L1

Answer 7

At the inguinal ligament

L1 is IL (inguinal ligament)

Question 8

L4

Answer 8

…includes the kneecaps

Down on ALL 4 (L4)

Question 9

S2,3,4

Answer 9

erection, sensation of penile and anal zone

S2,3,4 keeps your penis off the floor.

Question 10

Reflex: bicep

Answer 10

C5,6

hmm no reflex from thoracic!

Question 11

Reflex: tricep

Answer 11

C7,8

hmm no reflex from thoracic!

Question 12

Reflex: patella

Answer 12

L3,4

hmm no reflex from thoracic!

Question 13

Reflex: achillis

Answer 13

S1,2

hmm no reflex from thoracic!

Question 14

Reflex: babinski

Answer 14

Dorsiflexion of the big toe and fanning of the other toes;

sign of UMN lesion, but normal reflex in 1st year of life

Question 15

How to remember reflex

Answer 15

Reflexes count up in order
S1,2
L3,4
C5,6
C7,8

Question 16

Primitive reflex: definition

Answer 16

CNS reflexes that are present in healthy infants, but absent in neurologically intact adults.
Normally disappear in the 1st year of life.
These primitive reflexes are inhibited by a mature/developing frontal lobe.

They may re-emerge in adults following frontal lobe lesions–loss of inhibition of these reflexes

Question 17

Primitive reflex: moro reflex

Answer 17

Hanging on for life

Abduct/extend limbs when startled and then draw together.

Question 18

Primitive reflex: rooting reflex

Answer 18

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

Question 19

Primitive reflex: sucking reflex

Answer 19

Sucking response when root of mouth is touched

Question 20

Primitive reflex: palmar reflex

Answer 20

Curling of fingers if palm is stroked

Question 21

Primitive reflex: plantar reflex

Answer 21

Dorsiflexion of large toe and fanning of the other with platar stimulation

Question 22

Primitive reflex: galant reflex

Answer 22

Stroking alone one side of the spine while newborn is in ventral suspension (face down) causes lateral flexion of lower body toward stimulated side.