Caudal Hip Muscles and Cranial muscles of the thigh

Question 1

Internal Obturator
Origin
Insertion 
Action 
Innervation

Answer 1

Origin: symphysis pelvis (ischium and pubis- dorsal)

Insertion: the trochanter fossa of the femur

Action: rotate the pelvic limb laterally at the hip joint

Innervation: sciatic nerve

Question 2

External Obturator 
Origin
Insertion 
Action 
Innervation

Answer 2

Origin: the ventral surface of the pubis and ischium

Insertion: trochanteric fossa

Action: rotate the pelvic limb laterally at the hip joint

Innervation: Obturator nerve

Question 3

Quadraceps Femoris 
4 parts 
action of rectus femoris? 
origin and insertion of all heads?
innervation?

Answer 3

1. rectus femoris
   - action: to extend the stifle joint and flex the hip joint
   - origin: ilium
2. vastus lateralis
3. vastus intermedius
4. vastas medialis

Origin: (vasti muscles) - proximal femur
Insertion: tibial tuberosity
Innervation: femoral nerve

Question 4

Gemelli m.
Action
Innervation

Answer 4

Action: rotate the pelvic limb laterally at the hip joint

Innervation: Sciatic Nerve

Question 5

Quadratus Femoris
Action
Innervation

Answer 5

Action: extend the hip joint and rotate pelvic limb laterally

Innervation: Sciatic Nerve

Question 6

Patella and patellar ligament

Answer 6

Patella -sesamoid bone, articulates with the trochlea of the femur

patellar ligament - tendon of insertion of quadreceps femoris and that extends from the patella to the tibial tuberosity

Question 7

Iliopsas
Action
Innervation

Answer 7

Action: to flex the hip joint
Innervation: lumbar spinal nerves and femoral nerve