Lecture 17- mm of the anterolateral abdominal wall

Question 1

External Oblique

Answer 1

O: lower 8 ribs

I: broad aponeurosis, xiphoid process, linea alba, pubic crest, public tubercle & ant. 1/2 iliac crest

N: T7-T12 Ventral Rami, iliohypogastric & ilioinguinal n

A: flexion, ipsilateral flexion, contralateral rot.
supports and compresses abdominal viscera
assists in forced expiration

Question 2

Internal Oblique

Answer 2

O: TLF, ant. .2/3 iliac crest, lat 2/3 inguinal lig

I: ribs 10-12, broad aponeurosis to linea alba, xiphoid process & pubic symphysis

N: T7-T12 Ventral Rami, iliohypogastric & ilioinguinal

A: -flex, ipsilateral flex, ipsilateral rot
-supports and compresses abdominal viscera
-assists inn forced expiration

Question 3

Transverse Abdominus

Answer 3

O: inner surface of lower 6 costal cartilages (7-12), TLF, ant 2/3 iliac crest, lat 1/3 inguinal ligament

I: broad aponeurosis, xiphoid process, linea alba, pubic symphysis

N: T7-T12 Ventral Rami, iliohypogastric & ilioinguinal n

A: -supports and compresses abdominal viscera
-assists in forced expiration

Question 4

Rectus Abdominus

Answer 4

O: pubic crest, pubic symphysis

I: outer surface of the xiphoid process & 5,6,7 costal cartilages

N: T7-T12 Ventral Rami

A: -flexes trunk
- compresses abdominal viscera
- assists in forced expiration

Question 5

Pyramidalis

Answer 5

O: ant surface of pubis and pubic symphysis

I: linea alba

N: T12 Ventral Ramus

A: tenses linea alba

Question 6

Diaphragm

Answer 6

O: xiphoid process, lower 6 ribs and costal cartilages and L1-L3 (sometimes L4)

I: Central tendon (at level of xiphisternal jt)

N: Phrenic C3,4,5

A: Inspiration

Question 7

External Intercostals

Answer 7

O: inf border of rib above

I: sup border of rib below

N: intercostal nerves(ventral rami T1-T12) or thoracic n

A: elevates ribs during quiet and forced inspiration

Question 8

Internal Intercostals

Answer 8

O: sup border of rib below

I: inf border of rib above

N: intercostal nerves (T1-T12) or thoracic n

A: draws adjacent ribs together during forced expiration

Question 9

Innermost Intercostals

Answer 9

O: adjacent ribs

I: adjacent ribs

N: intercostal nerves

A: assists external and internal intercostals (primarily in forced expiration)