Anterior abd wall Flashcards
m. of anterolateral abd
3 flat
external oblique
internal oblique
transversus abdominis
2 vertical
rectus abdominis
pyramidalis
external oblique
o: 5th-12th ribs
I: linea alba, public tubercle, anterior iliac crest
n: intercostal nn. (T7-T11, subcostal T12)
internal oblique
o: thoracolumbar fascia, iliac crest, anterior superior iliac spine, iliopsoas fascia
I: 10th-12th ribs (Lower borders), linea alba
N: intercostal (T7-T12), iliohypogastric & ilioinguinal nn. (L1)
layers of anterolateral abd wall
skin
superficial fascia (camper’s/fatty and scarpa’s/membranous)
deep (investing) fascia (connective tissue sheaths and transversals fascia)
parietal peritoneum
transversus abdominis
o: 7th-8th costal cartilages, thoracolumbar fascia, iliac crest, anterior superior iliac spine, illiopsoas fascia
I: linea alba, pubic crest
n: intercostal nn. (T7-T12), iliohypogastric and ilioinguinal nn.
rectus abdominis
o: pubis
I: 5th-7th intercostal cartilages, diploid process of sternum
n: intercostal nn.
rectus pyrimidalis
o: pubis
I: linia alba
n: subcostal, T12
thoracoabdominal n. roots
T7-T11
subcostal n. roots
T12
iliohypogastric n. roots
L1
ilioinguinal n. roots
L1
umbilicus landmark
T10
weak spots for hernias
deep inguinal ring
inguinal (Hesselbach’s triangle)
inguinal ligament
Poupart’s ligament
fibrous band formed by inferior border (thickened, unreturned) of ext. oblique m.
extends from ASIS to pubic tubercle
inguinal canal
obliquely directed passage thru layers of lower abd wall, transmits spermatic cord in male and round ligament in female
superficial inguinal ring
slit-like gap between medial and lateral crura of external oblique aponeurosis, bridged by intercrural fibers
spermatic cord coverings
external spermatic fascia
cremasteric m.
cremasteric fascia
internal spermatic fascia
spermatic cord constituents
ductus deferens testicular a. a. of ductus deferens cremasteric m. and a. pampiniform plexus of veins nerves lymphatic vessels obliterated process vaginalis
cremaster m.
small bundle of fibers connecting internal oblique m. to spermatic cord (or round ligament in uterus of female)
ilioinguinal n. course in inguinal canal
courses in inter muscular plane between external oblique and internal oblique m. within the inguinal canal
ilioinguinal n. vs. iliohyogastric n.
ilioinguinal n. runs parallel and inferior to iliohypogastric n.
ilioinguinal n. emerges from superficial inguinal ring
cremasteric reflex
tests spinal segments and possible testicular torsion
afferent limb: femoral branch of genitofemoral n. and ilioinguinal n.
efferent limb: genital branch of genitofemoral n.
iliohypogastric n.
L1
skin above inguinal ligament
ilioinguinal n.
L1
skin of anterior scrotum and adjacent thigh
