AOIS LE

Question 1

Pectineus origin

Answer 1

• Pecten pubis (b/w iliopectinal eminence and pubic tubercle)
• anterior fascia

Question 2

Pectineus insertion

Answer 2

Femur shaft (line b/w lesser trochanter and linea aspera)

Question 3

Pectineus actions

Answer 3

• Hip addiction

- accessory to hip flexion

Question 4

Pectineus innervation

Answer 4

• L2-L3 femoral nerve

- L3 obturator nerve

Question 5

Psoas Major origin

Answer 5

• inferior border of transverse processes of L1-L5 vertebrae
• T12-L5 vertebral bodies and intevertebral discs bw them (by 5 digitations)
• tendinous arches across the lumbar vertebral bodies

Question 6

Psoas Major insertion

Answer 6

-lesser trochanter of femur

Question 7

Psoas Major action

Answer 7

• hip flexion with origin fixed and trunk flexed (sit up) with insertion fixed
• hip external (lateral) rotation
• flexion of lumbar spine (bilateral muscles)
• lateral bending of lumbar spine to SAME side (unilateral)

Question 8

Psoas Major innervation

Answer 8

L1-L4 spinal nerves (lumbar plexus-ventral rami)