LOWER LIMB: Blood Supply and Innervation

Question 1

FEMORAL ARTERY

Answer 1

Conti.nuation External Iliac Artery
Deep Femoral= 1-5cm inferior to Inguinal ligament
4 Perforating branches
Through Adductor Magnus
Terminates as 4th perforating branch in Adductor Hiatus as Popliteal Artery
Pulse - halfway between ASIS and Pubic Symphysis

Question 2

CRUCIATE ANASTOMOSIS

Answer 2

Connection of 4 arteries around Femoral Neck
CONTRIBUTIONS:
MEDIAL and LATERAL Circumflex Femoral Arteries
- from deep artery thigh
First Perforating Branch
- from deep artery thigh
Inferior Gluteal Artery
- from internal iliac artery

Question 3

FEMORAL HEAD AND NECK

Answer 3

Artery of round ligament ~ from Obturator Artery
Retinacular Arteries ~ from Medial and Lateral Circumflex Femoral Arteries

Question 4

ANTERIOR TIBIAL ARTERY

Answer 4

From Popliteal Artery
Enters through gap in Interosseus Membrane
Descends between Tibialis Anterior and Extensor Digitorum Longus
Becomes Dorsal Pedal Artery at ankle
- Midway between Lateral and Medial Malleoli
- Dorsal Pedal Pulse felt

Question 5

POSTERIOR TIBIAL ARTERY

Answer 5

From Popliteal Artery = gives off Fibular Artery
Descends Anterior Triceps Surae
Through Tarsal Tunnel = becomes Medial and Lateral Plantar Arteries

Question 6

GREAT SAPHENOUS

Answer 6

Union Dorsal veins on Medial side, big toe and Dorsal venous arch
COURSE:
-Ascends Anterior Medial Malleolus
- Posterior to Medial Condyle Femur (hand breadth Posterior to Patella Medial border)
- Crosses Saphenous opening Fascia Latae
- Drains into Femoral Vein

Question 7

SMALL SAPHENOUS

Answer 7

Union Dorsal veins Lateral side, small toe and Dorsal venous arch
COURSE:
- Ascends Posterior Lateral Malleolus
- Lateral border Calcaneus Tendon
- Inclines midline Fibula (penetrating deep fascia)
- Ascends between heads Gastrocnemius
- Drains into Popliteal Vein

Question 8

INGUINAL LYMPH NODES (Superficial)

Answer 8

UPPER Group:
- Below/Parallel Inguinal ligament
- Drain Glutes and Abdomen (inferior to umbilicus) and External Genitalia
LOWER Group:
- Next to Great Saphenous
- Drains lower limb (except Popliteal nodes)

Question 9

INGUINAL LYMPH NODES (Deep)

Answer 9

Adjacent Femoral Vein
Drain:
~ Superficial lymph nodes
~ Penis
~ Lymph vessels next to Femoral Artery