Posterior Thigh Compartment

Question 1

Name the cutaneous nerves of posterior thigh (4)

Answer 1

1. Posterior Cutaneous nerve of thigh
2. Medial branches of anterior cutaneous nerve of thigh
3. Branches from lateral cutaneous nerve of thigh
4. Branches from Obturator nerve

Question 2

Name the 4 hamstring muscles

Answer 2

1. Semimembranosus
2. Semitendinosus
3. Long head of biceps femoris
4. Ischial head of adductor magnus

Occasionally short head of biceps femoris is also included

Question 3

Characteristic features of Hamstring muscles are (4)

Answer 3

1. All arise from ischial tuberosity
2. All are inserted in one bone of leg
3. All are supplied by tibial branch of Sciatic nerve
4. All are flexors of knee and extensors of hip

Question 4

Tibial collateral ligament of knee joint represents

Answer 4

Degenerated tendon of adductor magnus

Question 5

Adductor magnus extends only upto the

Answer 5

Adductor tubercle of femur

Question 6

The muscle which is an exception to the characteristics of hamstrings

Answer 6

Adductor magnus

Question 7

Origin of Ischial Adductor magnus

Answer 7

Inferiolateral aspect of Ischial tuberosity

Question 8

Insertion of Ischial Adductor magnus

Answer 8

Adductor tubercle on femur

Question 9

Origin of semitendinosus and long head of biceps femoris

Answer 9

Lower medial part of upper quadrangular half of Ischial tuberosity

Question 10

Origin of semimembranosus

Answer 10

Upper lateral part of upper quadrangular half of the Ischial tuberosity

Question 11

Insertion of semitendinosus

Answer 11

Medial part of proximal shaft of tibia

Question 12

Origin of short head of biceps femoris

Answer 12

Lateral/outer lip of linea aspera and the upper 2/3 rd of the lateral supracondylar ridge

Question 13

Insertion of semimembranosus

Answer 13

Horizontal groove on the posterior medial condyl of tibia

Question 14

Head of fibula is insertion of

Answer 14

Biceps femoris

Question 15

Long head of biceps femoris is innervated by

Answer 15

Tibial branch of Sciatic nerve

Question 16

Short head of biceps femoris is innervated by

Answer 16

Common peronal branch of Sciatic nerve

Question 17

Semitendinosus is innervated by

Answer 17

Tibial nerve

Question 18

Semimembranosus lies ____________ to the semitendinosus

Answer 18

DEEP

Question 19

Semimembranosus is innervated by

Answer 19

Tibial nerve

Question 20

If hamstring muscles are paralysed

Answer 20

Patient tends to fall forward because gluteus maxiumus cannot maintain enough tone

Question 21

All hamstring muscles are innervated by the tibial branch of Sciatic nerve except

Answer 21

Short head of biceps femoris which is innervated by the common peronal nerve