posterior layer of rectus sheath

(redirected from lamina posterior vaginae musculi recti abdominis)

pos·te·ri·or lay·er of rec·tus sheath

the portion of the sheath of the rectus abdominis muscle that lies posterior to the muscle covering only its upper two thirds; it is formed by contributions from the aponeuroses of the internal oblique and transversus abdominis muscles; its free inferior margin forms the arcuate line; it is deficient below this, the posterior aspect of the muscle being covered only by transversalis fascia and peritoneum.
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