thigh font and medial muscles

Question 1

Rectus femoris

Answer 1

origin: Straight head - upper half of anterior inferior iliac spine
reflected head-ilium superior to acetabulum
insertion: Base of patella and to tibial tuberosity via patellar ligament
nerve: Femoral nerve
action: Extensor of knee joint, Flexor of hip joint

Question 2

Vastus Lateralis

Answer 2

origin: Greater trochanter, lateral lip of gluteal tuberosity, lateral lip of linea aspera
insertion: Base of patella and to tibial tuberosity via patellar ligament
nerve: Femoral nerve
action: Extends the knee while standing, walking and running

Question 3

Vastusmedialis

Answer 3

origin: Intertrochanteric line, greater trochanter, lateral lip of gluteal tuberosity, and lateral lip of linea aspera
insertion: Base of patella and to tibial tuberosity via patellar ligament
nerve: Femoral nerve
action: Extends the knee joint,
prevents lateral displacement of patella
rotates femur medially in locking of knee joint steadies of the patella

Question 4

Vastus Intermedius

Answer 4

origin: Upper 3/4th of anterior and lateral surface of femur shaft
insertion: Base of patella and to tibial tuberosity via patellar ligament
nerve: Femoral nerve
action: Extends the knee

Question 5

Piriformis: It arises from the pelvis, passes through greater sciatic foramen to reach gluteal region

Answer 5

origin: Anterior surface of sacral segments 2–4, sacrotuberous ligament
insertion: Apex of the greater trochanter of the femur
nerve: S1 and S2 nerves
action: Lateral rotator of the hip joint

Question 6

Superior gemellus

Answer 6

origin: Spine of the ischium
insertion: Medial surface of greater trochanter of femur
nerve: Nerve to obturator internus
action: Lateral rotator of the hip joint

Question 7

Inferior gemellus

Answer 7

origin: Lower margin of the lesser sciatic notch and upper part part of the ischial tuberosity
insertion: Medial surface of greater trochanter of femur
nerve: Nerve to obturator internus
action: Lateral rotator of the hip joint

Question 8

Obturator internus:
It forms the lateral wall of the pelvis

Answer 8

origin: Inner surface of the obturator membrane, adjoining pelvic surface of the ischium and ischiopubic ramus
insertion: The two gemulli and tendon of the obturator internus join together to form a tricipital tendon. It crosses the posterior aspect of the neck of the femur, inserted into medial surface of the greater trochanter
nerve: Nerve to obturator internus muscle
action: Lateral rotator of the hip joint

Question 9

Quadratus femoris

Answer 9

origin: External surface of the ischial tuberosity
insertion: Quadrate tubercle near the middle of the inter-trochanteric crest
nerve: Nerve to quadrates femoris
action: Lateral rotator of the hip joint

Question 10

Adductor longus

Answer 10

origin: Narrow tendon from front of body of pubis
insertion:Middle third of linea aspera of femur
nerve: Anterior division of obturator nerve
action: Adductors of thigh at hip joint

Question 11

Adductor brevis

Answer 11

origin: Body of pubis
inferior pubic ramus
insertion: from pectineal line to proximal part of linea aspera
nerve: Obturator nerve
action: Adduction and weak flexion of hip joint

Question 12

Adductor magnus

Answer 12

origin: nferior pubic ramus, ramus of ischium
Hamstring part: ischial tuberosity
insertion: Gluteal tuberosity, linea aspera, medial supracondylar line
Hamstring part: adductor tubercle

nerve: Adductor part - posterior division of obturator nerve
Hamstring part - tibial part of sciatic nerve
action: Adductor part - adduction of hip
Hamstring part - Extension of hip joint

Question 13

Gracilis

Answer 13

origin: Body of pubis and inferior ramus of pubis
insertion: Upper part of medial surface of tibia behind Sartorius and in front of semitendinosus
nerve: obturator nerve
action: Flexor and medial rotator of thigh
Weak adductor

Question 14

Pectineus

Answer 14

origin: Superior ramus of pubis
insertion: pectineal line
nerve: Anterior fibres- fermoral nerve
Posterior fibres - anterior division of obturator nerve
action: Flexor and adductor of thigh

Question 15

muscles of medial compart.

Answer 15

• add longus
  -add brevis
  -add magnus
  -gracilis
  -pectineus

Question 16

ant compart of thigh

Answer 16

quadriceps femoris
iliopsoas
tensor fasciae latae
sartorius

Question 17

sartorius

Answer 17

origin: ASIS
insertion: upper part of medial surface of thigh
nerve: ant division of femoral nerve
action:flexion at hip and knee joint
abductor of knee joint

Question 18

tensor fasciae latae

Answer 18

origin: anterior part of iliac crest
insertion: upper part of iliotibial tract
nerve: superior gluteal nerve
action: abduct and medial rot at hip j
maintain extension in knee joint through iliotibial tract

Question 19

iliopsoas muscle

Answer 19

origin:
psoas: lumbar vertebral bodies
iliacus: iliac fossa
insertion: lesser trochanter of femur
nerve: lumbar spinal nerves L1,2,3
branch of femoral nerve to iliacus
action: chief flexor of hip joint