Perineal Muscles

Question 1

subcutaneous part of external anal sphincter (origin)

Answer 1

encircles around anal canal; has no bony attachments

Question 2

subcutaneous part of external anal sphincter (nerve)

Answer 2

inferior rectal nerve and perineal branch of S4

Question 3

subcutaneous part of external anal sphincter (action)

Answer 3

together with puborectalis, forms voluntary sphincter of anal canal

Question 4

superficial part of external anal sphincter (origin)

Answer 4

perineal body

Question 5

superficial part of external anal sphincter (insertion)

Answer 5

coccyx

Question 6

superficial part of external anal sphincter (nerve)

Answer 6

inferior rectal nerve and perineal branch of S4

Question 7

superficial part of external anal sphincter (action)

Answer 7

together with puborectalis, forms voluntary sphincter of anal canal

Question 8

deep part of external anal sphincter (origin)

Answer 8

encircles around anal sphincter; has no bony attachments

Question 9

superficial part of external anal sphincter (nerve)

Answer 9

inferior rectal nerve and perineal branch of S4

Question 10

superficial part of external anal sphincter (action)

Answer 10

together with puborectalis, forms voluntary sphincter of anal canal

Question 11

puborectalis part of levator ani (origin)

Answer 11

pubic bones

Question 12

puborectalis part of levator ani (insertion)

Answer 12

slings around junction of rectum and anal canal

Question 13

puborectalis part of levator ani (nerve)

Answer 13

perineal branch of S4 and perineal branch of pudendal nerve

Question 14

puborectalis part of levator ani (action)

Answer 14

together with external anal sphincter, forms voluntary sphincter of anal canal

Question 15

ischiocavernosus (origin)

Answer 15

ischial tuberosity and ramus

Question 16

ischiocavernosus (insertion)

Answer 16

fascia covering corpus cavernosus

Question 17

ischiocavernosus (nerve)

Answer 17

pudendal nerve (perineal branch)

Question 18

ischiocavernosus (action)

Answer 18

assists in erection of penis

Question 19

bulbospongiosus (origin)

male

Answer 19

perineal body, midline raphe

Question 20

bulbospongiosus (insertion)

male

Answer 20

fascia of bulb of penis and corpus cavernosus and spongiosum

Question 21

bulbospongiosus (nerve)

male

Answer 21

pudendal nerve (perineal branch)