Anterior Thigh Muscles

Question 1

Innervation and main action of pectineus?

Answer 1

Femoral nerve (L2,L3) may recieve branch from obturator nerve
Adducts and flexes hip joint with medial rotation

Question 2

Proximally attached in asis andsuperior part of notch inferior to it, and distally in superior part of medial surface of tibia

Answer 2

Sartorius

Question 3

Innervation and action of sartorius

Answer 3

Femoral nerve (l2, l3), flexes abducts and laterally rotates hip joint, flexes knee joint.

Question 4

Parts of Iliopsoas?

Answer 4

Psoas major, Iliacus

Question 5

Proximal, distal attachment of pectineus?

Answer 5

Superior ramus of pubis

Pectineal line of femur just inferior to lesser trochanter.

Question 6

Proximal distal attachment of psoas major?

Answer 6

Sides of T12-L5 vertebrae and discs between them, transverse processes of all lumbar Vertebrae
Lesser trochanter of femur

Question 7

Innervation and action of psoas major?

Answer 7

Anterior rami of lumbar nerves (L1 L2 L3)
Acting conjointly in flexing hip joint and in stabilizing this joint, psoas major also postural muscle that helps control deviation of trunk, active during standing.

Question 8

Proximally attached in iliac crest iliac fossa ala of sacrum anterior and sacro iliac ligaments, distally attached in tendon of psoas major, lesser trochanter, and femur distal to it.

Answer 8

Iliacus

Question 9

Innervation? Action? Of iliacus

Answer 9

Femoral nerve (L2, L3)
Acting conjointly in flexing hip joint and in stabilizing this joint

Question 10

Muscles of the Quadriceps femoris?

Answer 10

Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius

Question 11

Rectus femoris proximal distal attachments

Answer 11

Anterior inferior iliac spine and ilium superior to acetabulum
Quadriceps tendon

Question 12

Rectus femoris innervation and main action

Answer 12

Femoral nerve (l2 l3 l4), extends knee joint, rectus femoris also stabilizes hip joint, helps iliopsoas flex hip joint.

Question 13

Vastus lateralis vastus medialis proximal and distal attachments?

Vastus intermedius

Answer 13

Vl- greater trochante and lateral lip of linea aspera
Vm- intertrochanteric line and medial lip of linea aspera
Vi- anterior and lateral surfaces of shaft of femur

Quadriceps tendon, base of patella, vastus medialis, lateralis- also attach to tibia and patella via aponeuroses

Question 14

Vl vm vi innervation and main action?

Answer 14

Femoral nerve (L2 L3 l4)
Extends knee joint

Question 15

Vl vm vi innervation and main action?

Answer 15

Femoral nerve (L2 L3 l4)
Extends knee joint