muscles of the pelvic floor

Question 1

what are 3 roles of the pelvic floor muscles?

Answer 1

1. supporting the function of organs located in the pelvic bowl.
2. assisting with the voluntary control of expelling urine and feces.
3. resisting and/or supporting an increase in intra-abdominal pressure.

Question 2

what are some of the muscles that are found in the pelvic floor?

Answer 2

Levator ani, pelvic diaphragm, piriformis, urogenital diaphragm, obutator internus.

Question 3

ischiocavernosus

Answer 3

O: ischial tuberosities
I: tissue of the penis or clitoris
A: slows down venous drainage, maintains erection of erectile tissue.

Question 4

Bulbospongiosus

Answer 4

O: central tendon of the perineum (+ midline of the raphe of the penis).
I: Tissue of the penis or clitoris.
A: maintains erection of erectile tissue.

Question 5

Muscles of the pelvic diaphragm

Answer 5

Coccygeus and levator ani

Question 6

Coccygeus

Answer 6

O: spine of the ishium
I: sacrum and coccyx
A: supports position of coccyx

Question 7

Levator ani

Answer 7

the fibers of this muscle extend inferomedial from the anterior pelvis (O) to form a sling around the vagina/prostate, urethra and anus towards the inner surface of the coccyx (I)
A: supports position of coccyx.

Question 8

sphincters

Answer 8

External urethral sphincter & external anal sphincter

Question 9

external urethral sphincter

Answer 9

O: ischium and pubic bones
I: central tendon of the perineum
A: constricts the urethra allowing voluntary inhibition of urination

Question 10

external anal sphincter

Answer 10

wraps around the anus
O: ischium and pubic bones.
I: anterior and posterior insertion. anterior is central tendon of the perineum and posterior is anococcygeal ligament.
A: constricts the anal canal allowing voluntary inhibition of defecation.
Basically these 2 muscles stop urination and feces.