Summary muscles of the abdoment

Muscles Of The Abdomen

Name. Position. Origin. Insertion. Action. Nerve Supply.
Linea alba,
Obliquus
Eight lower ribs outer lip iliac Compresses Intercostal.
externus Side and
by fleshy crest, viscera. Flexes Ilio-
abdominis. front of
digitations, ensiform thorax. Assists hypogastric.
abdomen.
lumbar fascia. cartillage, expiration. Ilio-inguinal.
(lateral)
pubis.
Outer half
Obliquus cartilages four
Poupart's Compresses Intercostal.
internus Beneath lower ribs,
ligament, viscera. Flexes Ilio-
abdominis. external ensiform
lumbar fascia, thorax. Assists hypogastric.
oblique. cartilage,
middle lip iliac in expiration. Ilio-inguinal.
(lateral) linea alba.
crest.
Outer third
Poupart's
ligament, inner
Transversalis Compresses Intercostal.
Beneath lip iliac crest, Linea alba,
abdominis. viscera. Flexes Ilio-
internal cartilages six pubis,
thorax. Assists hypogastric.
oblique. lower ribs, pectineal line.
(lateral) in expiration. Ilio-inguinal.
lumbar
vertebras,
lumbar fascia.
Rectus
The whole Ensiform and Compresses Intercostal.
length of fifth to viscera. Flexes Ilio-
abdominis. Pubic crest.
front of seventh costal thorax. Assists hypogastric.
abdomen. cartilages. in expiration. Ilio-inguinal.
(anterior)
Lower part
Pyramidalis.
of abdomen Makes tense Ilio-
Pubic crest. Linea alba.
in front of linea alba. hypogastric.
(anterior)
rectus.
Lower border
of last rib, Keeps spine
Quadratus Ilio - lumbar Branches of
In the transverse straight. Aids
lumborum ligament and lower dorsal
lumbar processes of in contracting
portion of crest and upper
region. upper four diaphragm.
(posterior) of ilium. lumbar.
lumbar Flexes trunk.
vertebrae.
Psoas magnus. In the pelvis Bodies and Lesser Flexes thigh Third lumbar.
on the side transverse trochanter. on trunk or
of the process; s of last trunk on thigh.
lumbar dorsal and all
region of lumbar