Inguinal Canal - Boundaries

Boundaries

A first-order approximation is to visualize the canal as a cylinder,

To help define the boundaries, the canal is often further approximated as a box with six sides. Not including the two rings, the remaining four sides are usually called the "anterior wall", "posterior wall", "roof", and "floor". These consist of the following:

superior wall (roof):
transversus abdominis

internal oblique
medial crus of
external oblique muscle
anterior wall:
aponeurosis of external oblique
fleshy part of internal oblique (lateral third of canal only)
superficial inguinal ring (medial third of canal only)
(inguinal canal) posterior wall:
transversalis fascia
conjoint tendon (Inguinal falx,reflected part of inguinal ligament, medial third of canal only)
deep inguinal ring (lateral third of canal only)
inferior wall (floor):
inguinal ligament
lacunar ligament (medial third of canal only)
iliopubic tract (lateral third of canal only)

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