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Muscles (External Oblique (“oblique” because its fibers run in an oblique…
Muscles
External Oblique
“oblique” because its
fibers run in an oblique forward downward direction
hand in pocket
the most superficial muscle
Those three
muscles’
aponeuroses
split and cover
another bulge
which is the rectus
abdominis muscle
the aponeuroses rejoin and fuse
in the midline with the aponeuroses from the other side in the area of linea alba
made of
fascia only
join in the area
of linea
semilunaris
made of collagen
fibers only
Internal Oblique
deep to the external oblique
fibers run in an oblique forward upward direction
Transversus Abdominis
the deepest muscle layer
fibers run horizontally
in a transverse direction
Linea semilunaris will
be located between
lateral
anterior
Linea alba will be the
midline
the area of fusion of
aponeuroses from
left and right sides
of the abdomen
those muscles end medially and an aponeurosis forms there
Aponeurosis is a “flat” tendon that forms at the end of “flat” muscles
their insertion is in the
linea alba
represents the continuity
of the lateral and anterior
abdominal walls