Thigh Muscles

Question 1

Rectus Femoris Origin & Insertion

Answer 1

Origin:
Anterior inferior iliac spine (AIIS)

Insertion:
Patella base; Patellar tendon; Tibial tuberosity

Question 2

Rectus Femoris Function & Innervation

Answer 2

Function:
Knee extension
Hip flexion

Innervation:
Femoral n.

Question 3

Vastus Lateralis Origin & Insertion

Answer 3

Origin:
Trochanteric line (upper); Greater trochanter; Gluteal tuberosity (lateral); Linea aspera lateral lip

Insertion:
Lateral knee; Patella base; Tibial tuberosity

Question 4

Vastus Lateralis Function & Innervation

Answer 4

Function:
Knee extension

Innervation:
Femoral n.

Question 5

Vastus Medialis Origin & Insertion

Answer 5

Origin:
Intertrochanteric line (lower); Linea aspera medial lip; Proximal medial supracondylar line

Insertion:
Medial knee; Patella base; Patellar tendon; Tibial tuberosity

Question 6

Vastus Medialis Function & Innervation

Answer 6

Function:
Knee extension

Innervation:
Femoral n.

Question 7

Vastus Intermedius Origin & Insertion

Answer 7

Origin:
Femoral shaft anterior lateral regions of upper 2/3

Insertion:
Patella lateral base; Patellar tendon; Tibial tuberosity

Question 8

Vastus Intermedius Function & Innervation

Answer 8

Function:
Knee extension

Innervation:
Femoral n.

Question 9

Sartorius Origin & Insertion

Answer 9

Origin:
Anterior superior iliac spine

Insertion:
Tibia medial surface

Question 10

Sartorius Function & Innervation

Answer 10

Function:
Hip flexion
Hip abduction
Hip lateral/external rotation
Knee flexion

Innervation:
Femoral n.

Question 11

Pectineus Origin & Insertion

Answer 11

Origin:
Super pubic ramus pectineal line

Insertion:
Pectineal line on femur posterior surface

Question 12

Pectineus Function & Innervation

Answer 12

Function:
Hip flexion
Hip adduction
Hip medial/internal rotation

Innervation:
Femoral n.

Question 13

Adductor Longus Origin & Insertion

Answer 13

Origin:
Body of pubis

Insertion:
Femur middle 1/3 of linea aspera

Question 14

Adductor Longus Function & Innervation

Answer 14

Function:
Hip adduction
Hip flexion
Hip medial/internal rotation

Innervation:
Obturator n.

Question 15

Adductor Brevis Origin & Insertion

Answer 15

Origin:
Inferior pubic ramus

Insertion:
Femur proximal 1/3 of linea aspera

Question 16

Adductor Brevis Function & Innervation

Answer 16

Function:
Hip adduction
Hip flexion
Hip medial/internal rotation

Innervation:
Obturator n.

Question 17

Adductor Magnus Origin & Insertion

Answer 17

Origin:
Ischial ramus; Ischial tuberosity

Insertion:
Femur linea aspera; Femur adductor tubercle

Question 18

Adductor Magnus Function & Innervation

Answer 18

Function:
Hip adduction
Hip extension
Hip medial/internal rotation

Innervation:
Obturator n.
Sciatic n (tibial n portion)

Question 19

Gracilis Origin & Insertion

Answer 19

Origin:
Pubis lower body; Pubis inferior ramus

Insertion:
Tibia medial surface

Question 20

Gracilis Function & Innervation

Answer 20

Function:
Hip flexion
Hip medial/internal rotation
Hip adduction
Knee flexion

Innervation:
Obturator n.

Question 21

Gluteus Maximus Origin & Insertion

Answer 21

Origin:
Ilium (outer); Gluteal line (posterior); Thoracolumbar fascia; Sacrum and coccyx (posterior)

Insertion:
Gluteal tuberosity; Iliotibial (IT) band

Question 22

Gluteus Maximus Function & Innervation

Answer 22

Function:
Hip extension
Hip lateral/external rotation
Hip adduction*

Innervation:
Inferior gluteal n.

Question 23

Gluteaus Medius & Gluteaus Minimus Origin & Insertion

Answer 23

Origin:
Ilium

Insertion:
Greater trochanter

Question 24

Gluteus Medius & Gluteus Minimus Function & Innervation

Answer 24

Function:
Hip abduction
Hip medial/internal rotation
Hip lateral/external rotation

Innervation:
Superior gluteal n.

Question 25

Tensor Fasciae Latae Origin & Insertion

Answer 25

Origin: Iliac crest; Anterior superior iliac spine Insertion: Proximal 1/3 of iliotibial (IT) band of fascia lata

Question 26

Tensor Fasciae Latae Function & Innervation

Answer 26

Function: Hip flexion Hip abduction Hip medial/internal rotation Innervation: Superior gluteal n.

Question 27

Piriformis Origin & Insertion

Answer 27

Origin: Anterior side of sacrum Insertion: Greater trochanter apex

Question 28

Piriformis Function & Innervation

Answer 28

Function: Hip lateral/external rotation Innervation: Nerve to the piriformis

Question 29

Biceps Femoris Origin & Insertion

Answer 29

Origin: Long head- ischial tuberosity Short head- Linea aspera lateral lip Insertion: Fibular head

Question 30

Biceps Femoris Function & Innervation

Answer 30

Function: Knee flexion Hip extension Innervation: Sciatic n.

Question 31

Semimembranosus Origin & Insertion

Answer 31

Origin: Ischial tuberosity Insertion: Tibia medial condyle

Question 32

Semimembranosus Function & Innervation

Answer 32

Function: Knee flexion Hip extension Innervation: Sciatic n.

Question 33

Semitendinosus Origin & Insertion

Answer 33

Origin: Ischial tuberosity Insertion: Tibia medial surface

Question 34

Semitendinosus Function & Innervation

Answer 34

Function: Knee flexion Hip extension Innervation: Sciatic n.