Lumbosacral Plexus And Lower Limb Overview

Question 1

Subcutaneous superficial fascia of lower leg

Answer 1

Continuous with the abdominal wall (scarpas and campers fascia)

Question 2

Deep fascia of the lower limb

Answer 2

Strong investing fascia that limits outward expansion of contracting muscles

Contracts of skeleton muscle in these compartments moves venous flow up from foot/leg to heart against gravity

Question 3

Varicose veins

Answer 3

Dilated veins that have dysfunctional valves.

Dysfunctional valves allow retrograde backflow of venous blood

Often present with pooling of blood in lower legs

Question 4

Iliotibial tract (IT BAND)

Answer 4

Shared aponeurosis between tensor fascia lata and gluteus Maximus

Holds leg in extension, stabilizes hip joint and prevents lateral displacement of femur

Question 5

4 major regions of lower limbs

Answer 5

Gluteal

Femoral

Crural

Pedal

Question 6

Simplified dermatome testing of lower limb

Answer 6

L1: inguinal region

L2: superior medial thigh

L3: superior medial knee

L4: medial malleolus

L5: webbing between 1st and 2nd digit

S1: heel

S2: medial popliteal fossa

S3: middle of buttocks

S4: most medial portion of buttocks