Dermatomes of the foot

Question 1

What are the L1 dermatomes?

Answer 1

Over the inguinal ligament.

Question 2

What are the L2 dermatomes?

Answer 2

Lateral thigh.

Question 3

What are the myotomic functions of L1-L2?

Answer 3

Flexion of the thigh.

Question 4

What are the dermatomes of L3?

Answer 4

Medial of the thigh.

Question 5

What are the dermatomes of L4?

Answer 5

Medial of the great toe.

Question 6

What are the myotomic functions of L3-L4?

Answer 6

Extension of the thigh.

Question 7

What are the dermatomes of L5?

Answer 7

Medial of the second toe digit.

Question 8

What are the myotomic functions of L5-S2?

Answer 8

Flexion at genu.

Question 9

What are the dermatomes of S1?

Answer 9

Little toe.

Question 10

What are the dermatomes of the S2?

Answer 10

The back of the thigh.

Question 11

What are the myotomic functions of S1-S2?

Answer 11

Most of the plantarflexion of the foot.

Question 12

What are the dermatomes of S3?

Answer 12

The skin over gluteal fold.

Question 13

What are the myotomic functions of S2-S3?

Answer 13

Adduction of the digits.

Question 14

What does the femoral nerve innervate sensorically?

Answer 14

Anterior of the thigh, medial side of leg and ankle.

Question 15

What does the obturator nerve innervate sensorically?

Answer 15

Medial thigh.

Question 16

What does the tibial part of the sciatic nerve innervate sensorically?

Answer 16

Lateral ankle and the foot.

Question 17

What does the superficial fibular nerve innervate sensorically?

Answer 17

Dorsum of the foot except for lateral of the little toe (sural nerve from the fibular and tibial branch of the scatic nerve).

Question 18

What does the deep fibular nerve innervate sensorically?

Answer 18

Between the first and second toe.

Question 19

What is the purpose of knee reflex patellar ligament check?

Answer 19

L3-L4 sensory-motoric functions.

Question 20

What is the purpose of calcaneal tendon reflex check?

Answer 20

Indicator of S1-S2 function.

Question 21

What are the pulse points of the lower limb?

Answer 21

Femoral pulse, popliteal pulse, posterior tibial pulse, and dorsalis pedis pulse.

Question 22

What are the 4 determinants of gait?

Answer 22

Pelvic rotation, hip adduction, knee flexion, pelvic tilt.

Question 23

What does pelvic rotation do to gait?

Answer 23

Lengthen the lower limbs and resulting in the non-lowering of the gravity centre.

Question 24

What does hip adduction do?

Answer 24

Makes sure that the knee doesn’t move too laterally, causing the centre of gravity to not stray too laterally from the midline.

Question 25

What does knee flexion do to gait?

Answer 25

Makes sure the knee is shortened when standing so that the centre of gravity doesn’t move up and stays low.

Question 26

What does pelvic drop contribute to gravity centre?

Answer 26

Pelvic drop during the rise of a leg