THE PERINEUM 342021 SCNM ANAT 604 The Perineum

PERINEUM • PELVIC FLOOR • PIERCED BY – MALE • URETHRA • ANUS –

BOUNDARIES • PUBIC SYMPHYSIS • PUBIS • ISHIUM: TUBEROSITY • SACRUM AND COCCYX •

PELVIC DIAPHRAGM: EXTERNAL • LEVATOR ANI – PUBOCOCCYGEUS • LEVATOR PROSTATAE/ PUBOVAGINALIS • PUBORECTALIS

PELVIC DIAPHRAGM: INTERNAL • PIRIFORMIS • LEVATOR ANI – PUBOCOCCYGEUS • LEVATOR PROSTATAE/ PUBOVAGINALIS

TRIANGLES • ANAL – POSTERIOR HALF – ISCHIORECTAL FOSSA • EXT. ANAL SPHINCTER •

CORONAL SECT. OF ANAL TRIANGLE • MUSCLE ON PELVIS – TRUE PELVIS • OBT.

FASCIA • TRANSVERSALIS FASCIA • OBTURATOR FASCIA • SUP. & INF. FASCIA OF PELVIC

ISCHIORECTAL FOSSA • PUDENDAL CANAL – INTERNAL PUDENDAL ARTERY – INTERNAL PUDENDAL VEIN –

UROGENITAL TRIANGLE • UROGENITAL DIAPHRAGM – SPHINCTER URETHRAE – DEEP TRANSVERSE PERINEUS – SUPERFICIAL

UROGENITAL TRIANGLE • MALE PERINEUM – URETHRA – CORPORA CAVERNOSA • CRUS – CORPUS

MUSCLES • PELVIC DIAPHRAGM • UROGENITAL DIAPHRAGM • ISCHIOCAVERNOSUS • BULBOSPONGIOSUS 3/4/2021 SCNM, ANAT

FASCIA • OBTURATOR INTERNUS FASCIA • INT. & EXT. FASCIA OF PELVIC DIAPHRAGM •

PENIS CROSS SECTION • DORSAL ARTERY AND VEIN • CORPORA CAVERNOSA – CENTRAL ARTERIES

SAGITTAL SECTION • CORPORA CAVERNOSA • CORPUS SPONGIOSUM – URETHRA – GLANS 3/4/2021 SCNM,

MECHANISM ERECTION • DILATION OF DEEP (CENTRAL) ARTERY. • INHIBITION OF VENOUS DRAINAGE. •

SCROTUM • DARTOS FASCIA 3/4/2021 SCNM, ANAT 604, The Perineum 17

FEMALE PERINEUM • MUSCLES OF THE FEMALE UROGENITAL TRIANGLE: – SPHINCTER URETHRAE – SUPERFICIAL

FEMALE PERINEUM • OPENINGS IN THE UROGENITAL TRIANGLE – URETHRA – VAGINA • CLITORIS

FASCIA • OBTURATOR INTERNUS FASCIA • SUP & INF. FASC. OF PELVIC DIA. •

LABIA MAJORA • HOMOLOGUE OF THE SCROTUM • ROUND LIGAMENT OF THE UTERUS TERMINATES

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THE PERINEUM 3/4/2021 SCNM, ANAT 604, The Perineum 1

PERINEUM • PELVIC FLOOR • PIERCED BY – MALE • URETHRA • ANUS – FEMALE • URETHRA • VAGINA • ANUS 3/4/2021 SCNM, ANAT 604, The Perineum 2

BOUNDARIES • PUBIC SYMPHYSIS • PUBIS • ISHIUM: TUBEROSITY • SACRUM AND COCCYX • SACROTUBEROUS LIGAMENT 3/4/2021 SCNM, ANAT 604, The Perineum 3

PELVIC DIAPHRAGM: EXTERNAL • LEVATOR ANI – PUBOCOCCYGEUS • LEVATOR PROSTATAE/ PUBOVAGINALIS • PUBORECTALIS – ILIOCOCCYGEUS • COCCYGEUS (ISHIOCOCCYGEUS) 3/4/2021 SCNM, ANAT 604, The Perineum 4

PELVIC DIAPHRAGM: INTERNAL • PIRIFORMIS • LEVATOR ANI – PUBOCOCCYGEUS • LEVATOR PROSTATAE/ PUBOVAGINALIS • PUBORECTALIS – ILIOCOCCYGEUS • COCCYGEUS (ISCHIOCOCCYGEUS) 3/4/2021 SCNM, ANAT 604, The Perineum 5

TRIANGLES • ANAL – POSTERIOR HALF – ISCHIORECTAL FOSSA • EXT. ANAL SPHINCTER • UROGENITAL – UROGENITAL DIA. 3/4/2021 SCNM, ANAT 604, The Perineum 6

CORONAL SECT. OF ANAL TRIANGLE • MUSCLE ON PELVIS – TRUE PELVIS • OBT. INTERNUS • PIRIFORMIS – FALSE PELVIS • ILIACUS – PSOAS • EXT. ANAL SPHIN. • LEVATOR ANI 3/4/2021 SCNM, ANAT 604, The Perineum 7

FASCIA • TRANSVERSALIS FASCIA • OBTURATOR FASCIA • SUP. & INF. FASCIA OF PELVIC DIA. • PUDENDAL SHEATH – FASCIAL COMPARTMENT – INTERNAL PUDENDAL A, V, N 3/4/2021 SCNM, ANAT 604, The Perineum 8

ISCHIORECTAL FOSSA • PUDENDAL CANAL – INTERNAL PUDENDAL ARTERY – INTERNAL PUDENDAL VEIN – INTERNAL PUDENDAL NERVE • ADIPOSE TISSUE 3/4/2021 SCNM, ANAT 604, The Perineum 9

UROGENITAL TRIANGLE • UROGENITAL DIAPHRAGM – SPHINCTER URETHRAE – DEEP TRANSVERSE PERINEUS – SUPERFICIAL TRANSVERSE PERINEUS 3/4/2021 SCNM, ANAT 604, The Perineum 10

UROGENITAL TRIANGLE • MALE PERINEUM – URETHRA – CORPORA CAVERNOSA • CRUS – CORPUS SPONGIOSUM • BULB 3/4/2021 SCNM, ANAT 604, The Perineum 11

MUSCLES • PELVIC DIAPHRAGM • UROGENITAL DIAPHRAGM • ISCHIOCAVERNOSUS • BULBOSPONGIOSUS 3/4/2021 SCNM, ANAT 604, The Perineum 12

FASCIA • OBTURATOR INTERNUS FASCIA • INT. & EXT. FASCIA OF PELVIC DIAPHRAGM • INT. & EXT. FASCIA OF UROGENITAL DIAPHRAGM • INVESTING FASCIA • COLLE'S FASCIA 3/4/2021 SCNM, ANAT 604, The Perineum 13

PENIS CROSS SECTION • DORSAL ARTERY AND VEIN • CORPORA CAVERNOSA – CENTRAL ARTERIES – VEINS • CORPUS SPONGIOSUM – URETHRA 3/4/2021 SCNM, ANAT 604, The Perineum 14

SAGITTAL SECTION • CORPORA CAVERNOSA • CORPUS SPONGIOSUM – URETHRA – GLANS 3/4/2021 SCNM, ANAT 604, The Perineum 15

MECHANISM ERECTION • DILATION OF DEEP (CENTRAL) ARTERY. • INHIBITION OF VENOUS DRAINAGE. • ERECTILE TISSUE BECOMES ENGORGED WITH BLOOD. 3/4/2021 SCNM, ANAT 604, The Perineum 16

SCROTUM • DARTOS FASCIA 3/4/2021 SCNM, ANAT 604, The Perineum 17

FEMALE PERINEUM • MUSCLES OF THE FEMALE UROGENITAL TRIANGLE: – SPHINCTER URETHRAE – SUPERFICIAL TRANSVERSE PERINEUS – DEEP TRANSVERSE PERINEUS 3/4/2021 SCNM, ANAT 604, The Perineum 18

FEMALE PERINEUM • OPENINGS IN THE UROGENITAL TRIANGLE – URETHRA – VAGINA • CLITORIS – CRURA • BULB 3/4/2021 SCNM, ANAT 604, The Perineum 19

MUSCLES • PELVIC DIAPHRAGM • UROGENITAL DIAPHRAGM • ISCHIOCAVERNOSUS • BULBOSPONGIOSUS 3/4/2021 SCNM, ANAT 604, The Perineum 20

FASCIA • OBTURATOR INTERNUS FASCIA • SUP & INF. FASC. OF PELVIC DIA. • SUP. & INF. FASC. OF UROGENITAL DIA. • INVESTING FASCIA • COLLE'S FASCIA 3/4/2021 SCNM, ANAT 604, The Perineum 21

LABIA MAJORA • HOMOLOGUE OF THE SCROTUM • ROUND LIGAMENT OF THE UTERUS TERMINATES • DARTOS MUSCLE 3/4/2021 SCNM, ANAT 604, The Perineum 22