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Flashcards in Pelvis Orientation Deck (18):

3 major functions of the pelvis

Provide space, transmit forces, provide attachment for muscles


What are the two parts of the pelvis?

Greater (false) pelvis and Lesser (true) pelvis


What are sacralization and lumbarization?

Sacralization - When L5 fuses with the sacrum, Lumbarization - When S1 does not fuse with the sacrum


What does the pudendal nerve sit right on top of near where it forms?

The sacrospinous ligament


Via what opening does the pudendal nerve exit the pelvic cavity?

The greater sciatic foramen


Origin of the pudendal nerve



What muscle covers the obturator foramen?

Obturator internus


What does the obturator internus muscle attach to distally and how does it get out of the pelvic cavity?

Exits through lesser sciatic foramen and attaches to femur (to laterally rotate hip)


Five differences in the female pelvis as opposed to the male pelvis

Wider, Shallower, Everted ischial spines (dont protrude inward as much), sacrum less curved, larger pelvic inlet and outlet


A pelvic diameter is considered adequate for childbirth if how many fingers can be inserted between what two points?

3 fingers side by side between ischial tuberosities


What is the boundary between the perineum and the pelvis?

The pelvic diaphragm


What is the pelvic diaphragm composed of?

The coccygeus and levator ani muscles


Give the origin, attachment, and function of the coccygeus muscle

Origin - Ischial spine, Attachment - Sacrum, Functions - Steady pelvis and form muscular closure of pelvic outlet


Give the attachments of the levator ani muscles

Coccyx and sacrum (posterior), Pubic bones (anterior), Ischial spines and arcuas tendinous levator ani (ATLA) (lateral)


What is the ATLA and what is it composed of?

Arcus Tendinous Levator Ani. It is really just deep fascia


5 syndromes which are related to pelvic floor disfunction

Urinary incontinence, fecal incontinence, chronic pelvic pain syndromes, sexual dysfunction, visceral prolapse (e.g. uterus)


What are the ischioanal (ischiorectal) fossae?

Extra spaces lateral to the floor of the pelvic diaphragm which allow for expansion and support. These spaces are filled with fat and loose connective tissue


What vessels run in the pudendal canal and what structure of the inferior pelvis carries this canal?

Internal pudendal artery, internal pudendal vein, pudendal nerve, nerve to obturator internus. This canal travels through ischioanal (ischiorectal) fossae

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