Lower Ex Muscles And Innervations

Question 1

Lateral rotators of thigh (6) whats another fxn?

Answer 1

G maximus
Piriformis
Superior gemellus
Obturator internus
Inferior gemellus
Quadratus femoris

Thigh abduction (like the medial rotators)

Question 2

G maximus action innervation

Answer 2

Extends thigh, assists in lat rot

Inferior gluteal nerve

Question 3

Piriformis action innervation

Answer 3

Lat rot EXTENDED thigh
Abducts FLEXED thigh

Branches of anterior rami of S1, S2

Question 4

Superior gemellus action innervation? Same as?

Answer 4

Lat rot thigh, nerve to obturator internus, same as obturator internus

Question 5

Inferior gemellus action innervation? Same as?

Answer 5

Lat rot thigh, nerve to quadratus femoris, same as quadratus femoris

Question 6

Anterior thigh sub…compartments? Innervation?

Answer 6

Hip flexors, knee extensors

Femoral nerves except for psoas!

Question 7

Hip flexors (4), innervation?

Answer 7

Psoas major and minor, iliacus, pectineus, sartorius

Innervation by femoral nerve EXCEPT psoas (anterior rami of lumbar nerves)

Question 8

Iliopsoas action innervation

Answer 8

Flexes hip, stabilize hip joint

Psoas - anterior rami of lumbar nerves
Iliacus - femoral nerve

Question 9

Knee extensors (?) (4) action (3)

Answer 9

Quadriceps femoris: rectus femoris, vastus lateralis, vastus medius, vastus intermedius

Extends knee
Steadies hip jt
Helps iliopsoas flex thigh

Question 10

Medial thigh compartment or? Muscles? (5…6?) innervation?

Answer 10

Thigh adductors

Adductor longus
Adductor brevis
Adductor magnus (adductor, hamstrings)
Gracilis
Obturator externus

Obturator nerve (a, p), sciatic nerve

Question 11

Adductor longus action innervation

Answer 11

Adduct thigh

Obturator nerve anterior

Question 12

Adductor brevis action innervation

Answer 12

Adducts thigh, to some extent flexion also

Obturator nerve (anterior)

Question 13

Adductor magnus action innervation

Answer 13

Adductor part, adduct and flex thigh, obturator nerve posterior

Hamstrings part, adduct and extend thigh, sciatic nerve tibial

Question 14

Gracilis action innervation

Answer 14

Adducts thigh, helps rotate leg laterally, obturator nerve

Question 15

Obturator externus action innervation

Answer 15

Lat rot thigh, steadies head of femur in acetabulum,

Obturator nerve

Question 16

Posterior thigh or? Muscles? (3) innervation)

Answer 16

Hip extensors and knee flexors

Semitendinosus
Semi membranosus
Biceps femoris, long and short head

Tibial division of sciatic nerve, common fibular division (short biceps)

Question 17

Components of medial rotators of thigh? Action and innervation? (3)

Answer 17

Glut medius, minimus, tensor fasciae latae
Medially rotates and ABDUCTS thigh
Superior gluteal nerve