Attachements of Quads and Hamstrings

Question 1

Sartorius

Answer 1

O: ASIS
I: Medial condyle - (via per anserinus)
Innervation: L2-L4 femoral nerve
Function -Hip joint: thigh flexion, abduction, external rotation
Knee joint - leg flexion and internal rotation

Question 2

Rectus Femoris

Answer 2

O: AIIS
I: Tibial tuberosity - patella tendon
Nerve: L2- L4 femoral nerve
Function: knee flexion thigh extension

Question 3

Vastus intermedius

Answer 3

O: anterior surface of femoral shaft
I: Tibial Tuberosity
N: L2- L4 femoral nerve
F: knee/leg extension

Question 4

Vastus lateralis

Answer 4

O: Linea aspera, greater trochanter of femur
I: tibial tuberosity & lateral condyle of tibial
N: L2 - L4 femoral nerve
F: knee flexion

Question 5

Vastus medialis

Answer 5

O: Intertrochanteric line, linear aspera, medial supracondyle line of femur
I: Tibial tuberosity
N: L2 - L4 femoral nerve
F: knee extension

Question 6

Semimembranosus
Origin?
insertion?
Action?
Nerve innervation?

Answer 6

O: Ischial tuberosity (superolateral impression)
I: Medial condyle of tibia
N: L5 - S2 tibial division of sciatic nerve
F: knee flexion and internal rotation
Thigh extension and internal rotation

Question 7

Semitendinosus
Origin:
insertion:
Nerve:
Action:

Answer 7

O: Ishial tuberosity (posteriolateral impression)
I: medial condyle of tibia (via pes anserinus)
N: L5- L2 tibial division of sciatic nerve
F: @hip thigh extension and internal rotation
Knee joint: flexion and leg internal rotators

Question 8

Biceps Femoris

Origin:
Insertion:
Nerve:
Action:

Answer 8

O: long head: ischial tuberosity/sacrotuberous ligament Short Head: linea aspera , lateral supracondylar line of femur
I: Head of fibula (lateral aspect)
N: Long head: tibial division of sciatic nerve L5-S2
Short head: common fibular nerve (L5-S2)
F: hip: Thigh extension, external rotation hip and knee.
Knee: leg flexion/ external rotation

Question 9

Adductor Magnus
African Mouse Sneaks Out

Origins: both
Insertion:
nerve:
Action:

Answer 9

O: Adductor part: is inferior pubic ramus/ischial ramus & ischial tuberosity:
I: Adductor: gluteal tuberosity, linera aspera/ media supracondylar line and adductor tubercle of femur
N: adductor part: obturator nerve (L2-L4) ischialcondylar part: tibial division of sciatic nerve (L4)
F: hip: thigh flexion, aDDuction, external rotation Adductor part: thigh extension/internal rotation (ischial condylar part); pelvis stabilization

Question 10

Gracilis

Origin:
Insertion:
Nerve:
Function:

Answer 10

O: anterior body of pubis/ inferior pubic ramus, ischial ramus
I: medial surface of tibial, via pes anserinus
N: obterator nerve (L2-L3)
F: hip: thigh flexion, thigh adduction
Knee: leg flexion, knee internal rotation

Question 11

Nerves that innervate the Psoas major

Answer 11

L1 - L3 anterior rami of spinal nerves

Question 12

nerves that stimulate Gluteus minimus, medius and TFL

Answer 12

Superior gluteal nerve L4-S1

Question 13

Nerves that innervate the hamstring group

Answer 13

Semitendinosus/membranous & long head Biceps femoris Tibial division of Sciatic nerve (L5-S2)
Biceps femoris Short head - common fibular division of sciatic nerve (L5 -S2)