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30 Cards in this Set

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Muscles of the lateral abdominal wall?
- External abdominal oblique
- Internal abdominal oblique
- Transversus abdominis
Muscles of the medial abdominal wall?
- Rectus abdominis
- Pyramidalis
Muscles of the deep abdominal muscles?
- Quadratus lumborum
- Psoas major
External abdominal oblique: Origin
8 slips on outer surface of rib 5-12

MERGE from ribs 5-9 with serratus anterior

FLAT APONEUROSIS from ribs 10-12 with latissimus dorsi
External abdominal oblique: Insertion?
Muscle transit into aponeurosis => aponeurosis form a fibrous raphe = Linea alba. Attach to inguinal ligament
Function of external abdominal oblique?
Pull chest downwards
Compress abdominal cavity
Origin of internal abdominal oblique?
Iliac crest, thoracolumbar fascia + anterior superior iliac spine
Insertion of internal abdominal oblique?
Cranial: Lower margin of caudal 3 ribs

Middle: To the rectus sheath (aponeurosis) and divides to 2 layers:
- Anterior: Cover rectus abdominis
- Posterior: Become the arcuate line below navel.
Both reunite at linea alba

Caudal:
- Male: As cremaster muscle
- Female: Become round ligament of uterus
Innervation of internal abdominal oblique?
Intercostal nerves
Origin of transversus abdominis?
- 6 slips at inner surface of 7-12th rib
- Inner lip of iliac crest
- Anterior superior iliac spine
- Inguinal ligament
Insertion of transversus abdominis?
To the abdominal aponeurosis, at semilunar line
What is the semilunar line of abdomen?
The line where the aponeurosis starts, from transversus abdominis
Origin of rectus abdominis?
- 3 slips from 5-7th rib
- Xiphoid process
Insertion of rectus abdomens?
Pubic crest, within the rectus sheath
Function of rectus abdominis?
Posture
Flex lumbar spine
Origin of pyramidal is?
Inferior linea alba - a small triangular muscle within the aponeurosis
Insertion of pyramidal is?
Pubis bone
Function of pyramidalis?
Tense the linea alba
Origin of quadratus lumborum?
Inner iliac crest
Insertion of quadratus lumborum?
Ventral: 12th rib
Dorsal: costal proces of 1-3 lumbar vertebrae
Function of quadratus lumborum?
Lowers 12th rib
Help flexion of body
Origin psoas major
Superficial:
- Lateral T12 + L1-L4 (+ their intervertebral discs)

Deep: costal processes of L1-L5
Insertion of psoas major?
Join iliacus to ILIOPSOAS => go through muscular lacuna and attach to lesser trochanter of femur
Function of psoas major?
- Elevation + flexor of leg / hip joint
- Lift upper half of body when lying down
Innervation of psoas major?
Lumbar plexus
Femoral nerve
4 main functions of superficial abdominal muscles?
1. Flexion
2. Lateral flexion
3. Rotation
4. Compression of abdominal cavity
Abdominal muscles that do flexion?
Rectus muscles
Oblique muscles assist
Abdominal muscles that do lateral flexion?
Ext&int oblique
Quadratus lumborum + intrinsic muscles
Abdominal muscles that do rotation?
Int&ext oblique
Abdominal muscles that do compression of abdominal cavity?
Transverse abdominal