Back Of Thigh

Question 1

Dermatome of back of thigh

Answer 1

S2

Question 2

Origin of hamstrings

Answer 2

Ischial tuberosity

Question 3

Common action of hamstrings

Answer 3

Knee flexion and hip extension

Question 4

Common nerve supply of hamstrings

Answer 4

Sciatic nerve; tibial part

Question 5

Innervation of short head of biceps femoris

Answer 5

Sciatic nerve ; common peroneal

Question 6

3 muscles attached to the upper part of medial surface of tibia and their innervation

Answer 6

SGS- sartorius gracilis semitendinosus
Sartorius- femoral n (anterior compartment)
Gracilis- obturator n (medial)
Semitendinosus- sciatic (posterior)

Question 7

Muscle that flexes hip joint and extends knee joint

Answer 7

Rectus femoris

Question 8

Muscle that flexes both the knee and hip joint

Answer 8

Sartorius

Question 9

Muscle that extends the hip and helps extending the knee

Answer 9

Gluteus Maximus

Question 10

Muscle supplied by both sciatic and obturator nerves

Answer 10

Adductor magnus

Question 11

Muscle that stabilizes pelvis during walking

Answer 11

Gluteus medius and minimus

Question 12

Sciatic nerve root values

Answer 12

L4,5,S1,2,3

Question 13

Landmarks/course of sciatic nerve

Answer 13

1. Passes in greater sciatic foramen below piriformis
2. Covered by gluteus Maximus and hamstrings
3. Terminates into the middle of back of the thigh as tibial and common peroneal nerve

Question 14

Branches of sciatic

Answer 14

1. Muscular branches to hamstrings and ischial part of adductor magnus
2. articular branches to hip and knee joint
3. Two terminal branches

Question 15

What is sciatica an what is it caused by?

Answer 15

Pain along the sensory distribution of the sciatic nerve, it is caused by herniated intervertebral disc compressing nerve roots

Question 16

Sciatic nerve injury causes,effects and deformity

Answer 16

Causes- wrong IM injection or compression by piriformis
Effects- paralysis of hamstrings and muscles of the leg and foot. Loss of sensation below the knee except the medial side of leg and foot
Deformity- foot drop