Dictionary of Human Evolution and Biology

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Lesser Pelvis

Narrower portion of the pelvis that begins at the pelvic inlet and continues inferiorly, forming a deep bowl that contains the pelvic organs. The pelvic inlet and outlet form a passageway through which the infant must pass during parturition; the dimensions of the lesser pelvis’ inlet and outlet are critical to an uncomplicated birth. Aka true pelvis. lesser sciatic notch: indentation in the posterior ischium of the coxal bone inferior to the ischial spine and superior to the ischial tuberosity through which several nerves and blood vessels pass to the anogenital area.

Cf. greater sciatic notch.

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