Posterior Thigh

Question 1

The deep fascia of the thigh is called…

Answer 1

fascia lata

Question 2

The deep fascia of the lower leg is called…

Answer 2

crural fascia

Question 3

the fascia lata forms…

Answer 3

intermuscular septa

Question 4

compartments formed by the fascia lata

Answer 4

anterior, posterior and medial

Question 5

compartments formed by the crural fascia

Answer 5

anterior, posterior and lateral

Question 6

specialization of the compartments in the thigh

Answer 6

anterior=quads (extends leg)
posterior=hams (flexes leg and extends thigh
medial=adductors (adducts thigh)

Question 7

adductor tubercle

Answer 7

on the medial femoral condyle; provides insertion for the adductor magnus muscle

Question 8

The tibia

Answer 8

know medial and lateral condyles that articulate with the condyles of the femur.

tibial plateaus: medial is larger and less cirular thatn the lateral articulating facet

Intercondylar tubercles or eminence separate the articular surfaces and fit into the intercondylar fossa between the femoral condyles

lateral condyle of the tibia bears a fibular facet on the posterolateral surface

the tibial tuberosity is where the patellar tendon attaches

Question 9

The fibula

Answer 9

apex (styloid process): attachment for for fibular collateral ligament and tendon of the biceps femoris muscle

neck: common fibular nerve lies against it

lateral malleolus: articulates with the trochlea of the talus
*lateral malleolus also ends in an apex

fibular head also bears articular facet for tibia at superior tibiofibular joint

Question 10

biceps femoris (long head) OINA

Answer 10

O: ischial tuberosity and sacrotuberous ligament

I: Head of fibula and lateral condyle of tibia

N: tibial n

A: extension at hip joint; flexion an external rotation of knee joint. rotation of flexed knee. perforating arteries

Question 11

biceps femoris (short head) OINA

Answer 11

O: lateral lip of linea aspera (attached to femur and is deep to long head)

I: head of fibula and lateral condyle of tibia

N: common fibular nerve

A: flexion and external rotation of knee. Perforating arteries

Question 12

semitendinosus OINA

Answer 12

O: ischia tuberosity and sacrotuberous ligament

I: medial surface of tibial tuberosity

N: tibial nerve

A: extension at hip joint; flexion and internal rotation of the knee joint. perforating arteries

Question 13

Semimembranosus OINA

Answer 13

O: outer surface of ishial tuberosity

I: medial tibial condyle; popliteal fascia and oblique popliteal ligament

N: tibial n

A: extension at hip joint; flexion and internal rotation of knee jt. perforating arteries of deep femoral artery

Question 14

Adductor magnus parts, innervation and insertion

Answer 14

adductor part inserts on linea aspera of femur

hamstring part inserts into the adductor tubercle of the femur

between the adductor and hamstring part is the adductor hiatus

The hamstring portion is innervated by the tibial n while the adductor portion is innervated by the obturator n

Question 15

causes of complete hamstring avulsion

Answer 15

forceful eccentric contraction (muscle contraction while muscle is lengthening. *may lead to avulsion of the proximal tendons from the ischial tuberosity. bone may wear away too.

Question 16

the hamstrings

Answer 16

extension at hip joint and flexion at knee joint. They cant fully do both at the same time–>leads to injury
hams are innervated by the tibial nerve except for the short head of the biceps femoris (common fibular n) which only acts to flex knee–no hip action

Question 17

A person with paralyzed hamstrings

Answer 17

will fall foward bc the glut max cannot maintain the necessary muscle tone to stand straight on its own.

Question 18

lateral and medial tendons of the knee visible from the outside

Answer 18

biceps femoris tendon (lateral) and semitendinosus tendon (medial)

Question 19

the sciatic nerve does not supply any of the muscles in which region?

Answer 19

gluteal

Question 20

Which muscle protect the sciatic nerve?

Answer 20

the long head of the biceps femoris. once the nerve divides it continued to protect the common fibular branch (lateral branch)

Question 21

deep femoral artery

Answer 21

provides 4 perforating branches to the posterior compartment to provide blood supply to posterior muscles

Question 22

slide 25

Answer 22

see slide 25 for walking mechanics