Posterior thigh and popliteal fossa

Question 1

Cutaneous innervation of posterior thigh

Answer 1

Lateral side of posterior region to proximal knee = lateral cutaneous nerve of thigh
Medial aspect of posterior thigh, and popliteal as well as proximal posterior leg = Posterior cutaneous nerve of thigh.
Medial thigh of posterior thigh is Posterior cutaneous nerve but anterior aspect of medial thigh = obturator nerve and femoral nerve.

Question 2

Cutaneous innervation of posterior leg

Answer 2

Lateral proximal half = Common fibular nerve
Distal lateral half and lateral foot = Tibial nerve (sural)
Medial leg and medial foot = Femoral nerve (saphenous nerve branch)
Heel of foot = Tibial nerve.

Question 3

Semi membranous

Answer 3

O - Ischial tuberosity
I - Medical condyle of tibia, posterior
N - Tibia branch of sciatic nerve
A - Profunda femoris a or popliteal in inferior part of hamstring
F - extend hip joint, flex knee joint and medial rotator of tibia in walking
*gives raise to oblique popliteal ligament and fascia that covers the poplitealus muscles

Question 4

Semitendenous

Answer 4

O - Ischial tuberosity
I - Pes anersinus. under gracilis
N - Tibia branch of sciatic nerve
A -Profunda femoris a or popliteal in inferior part of hamstring
F - extend hip joint, flex knee joint and medial rotator of tibia in walking
Path - on top of Semi membranous

Question 5

Biceps femoris

Answer 5

O - 1 - Ischial tuberosity, 2- Lateral lip of linea aspersa and supracondyle line
I - head of fibula
N - Tibia branch of sciatic nerve, short head is by common fibula nerve
A- Profunda femoris a or popliteal in inferior part of hamstring
F - extend hip joint, flex knee joint and lateral rotator of tibia in walking

Question 6

Hamstrings

Answer 6

Semimembranous
Semitendinous
Biceps femoris
Hamstring part of adductor magnus

Question 7

Source of the sciatic nerve and divisions

Answer 7

formed by anterior division and posterior division of anterior rami of L4,5,S1,2,3
Anterior division supply flexor muscle -> Tibia nerve (posterior compartment of thing and leg)
Posterior division supply extensor muscle -> Common fibula (anterior and lateral compartment of leg)

Question 8

Borders of popliteal fossa

Answer 8

Superior: Semimembranous and semitendenious (superior medially) and biceps femoris (superior laterally)
Inferior: Medial and lateral heads of gastrocnemius
Floor: popliteal surface of femur, capsule of knee joint and popliteus muscle and fascia
Roof: Fascia latte, sml saphenous vein (pieces it here), posterior cutaneous nerve of thigh

Question 9

Contents of popliteal fossa

Answer 9

Tibial n
Common fibula n
Popliteal A, V and LN
Fat

Question 10

Branches of tibial n

Answer 10

Vertical 
Motor branches at popliteal region:
plantaris muscle
Heads of gastrocnemius
soleus
Popliteus
Cutaneous branch = sural n join branches from common fibula (fibula communicating nerve) to supply lateral foot. 
Inferior to gastrocnemius, 
Motor branches lower down
Tibialis posterior
Flexor digitorum longus
Flexor hallucis longus
Branches to knee joint
genicular nerve supplies medial co lateral ligament, medial capsule and cruciate ligament.

Question 11

Common fibula path and branches

Answer 11

Path: inferior to bicep tendon over plantaris muscle, wraps around neck of fibula and then divides.
Branches:
Fibula communicating nerve which joins the sural n
Lateral cutaneous nerve - supplies the superior laterally and superior posterior skin
superior and inferior Genicular n supply capsule lateral of knee joint
current genicular n supply the tibial fibular joints
Terminal branches
superficial
Deep
Muscles
Fibularis longus (before divide)

Question 12

Popliteal Artery

Answer 12

Artery is the deepest structure in the fossa
length is a hand breath above and below
Branches
Divides
Supplies gastrocnemius heads
Genicular branches x5

Question 13

Politeal veins

Answer 13

Between art and nerve

Anterior and post tibial vein and small saphenous vein