Perineum Flashcards
what is the perineum?
an anatomical region located in the pelvis
diamond shaped structure
where is the perineum?
most inferior part of the pelvic outlet, located between the thighs
what is the perineum separated from the pelvic cavity superiorly by?
the pelvic floor
functionally, what does the perineum contain?
contains structures that support the urinary, genital and gastrointestinal viscera
vital roles of perineum?
micturition
defectation
sexual intercourse
childbirth
what are the 2 ways the boundaries of the perineum can be described?
structural and anatomical
what does the anatomical boundary of the perineum refer to?
its exact bony margins
what do the surface borders of the perineum describe?
the surface anatomy which marks the borders of the perineum
anterior anatomical border of perineum?
Pubic symphysis
posterior anatomical border of perineum?
The tip of the coccyx
lateral anatomical border of perineum?
Inferior pubic rami and inferior ischial rami, and the sacrotuberous ligament
anatomical border of perineum: roof?
The pelvic floor
anatomical border of perineum: base?
Skin and fascia
how can the perineum be subdivided?
by a theoretical line drawn transversely between the ischial tuberosities
what does the theoretical line drawn transversely between the ischial tuberosities split form?
the anterior urogenital and posterior anal triangles
what are the anterior urogenital and posterior anal triangles associated with?
different components of the perineum
when are the surface borders of the perineum best shown?
when the lower limbs are abducted, and a diamond shape is depicted
anterior surface (skin) boundary of the perineum?
Mons pubis in females, base of the penis in males
lateral surface (skin) boundary of the perineum?
Medial surfaces of the thighs
posterior surface (skin) boundary of the perineum?
Superior end of the intergluteal cleft
