Final

Question 1

External Intercostals

Answer 1

I: intercostal nerves
O: inferior borders of ribs 1-11
I: superior borders of ribs 2-12
A: maintains intercostal space in breathing, elevates ribs in inspiration

Question 2

Internal Intercostals

Answer 2

I: intercostal nerves
O: superior borders of ribs 2-12
I: inferior borders of ribs 1-11
A: maintains intercostal space in breathing, depresses ribs in expiration

Question 3

Diaphragm

Answer 3

I: phrenic nerve
O: xiphoid process, costal cartilages of ribs 7-10, bodies of ribs 11-12, bodies and transverse processes of L1-3
I: central tendon
A: descends the central tendon during inspiration and increases the volume of the thoracic cage

Question 4

Rectus Abdominis

Answer 4

I: thoracic nerves 7-12
O: symphysis pubis, pubic crest
I: costal cartilages 5-7, xiphoid process
A: flexes vertebral column, compresses abdomen

Question 5

External Abdominal Oblique

Answer 5

I: thoracic nerves 7-12, iliohypogastric nerve
O: ribs 5-12
I: iliac crest, linea alba; inferior fibers fold back on themselves posteriorly and attach to ASIS to pubic tubercle to form INGUINAL LIGAMENT
A: flexion, ipsilateral lateral flexion, contralateral rotation of the vertebral column; compresses abdomen

Question 6

Internal Abdominal Oblique

Answer 6

I: thoracic nerves 8-12, iliohypogastric nerve
O: inguinal ligament, iliac crest, thoracolumbar fascia
I: costal cartilages of ribs 8-10, linea alba
A: flexion, ipsilateral lateral flexion, ipsilateral rotation of the vertebral column, compresses abdomen

Question 7

Tranversus Abdominis

Answer 7

I: thoracic nerves 8-12, iliohypogastric, ilioinguinal
O: inguinal ligament, iliac crest, thoracolumbar fascia, costal cartilages of ribs 7-10, bodies of ribs 11-12
I: linea alba, pubic tubercle
A: compresses abdomen

Question 8

Psoas Major

Answer 8

I: lumbar nerves 2-3
O: traverse processes, bodies, intervertebral discs of T12-L5
I: lesser trochanter of femur
A: flexion and lateral rotation of femur, flexion of lumbar vertebra

Question 9

Iliacus

Answer 9

I: femoral nerve
O: iliac fossa
I: tendon of psoas major
A: flexion and lateral rotation of femur

Question 10

Quadratus Lumborum

Answer 10

I: thoracic nerve 12, lumbar nerves 1-3
O: iliac crest
I: transverse processes of L1-4, 12th rib
A: lateral flexion of the lumbar vertebra