Pelvis and Perineum Flashcards
Anterior Boundary of Perineum?
Pubic Symphysis
Posterior Boundary of Perineum?
Coccyx Tip
Lateral Boundary of Perineum?
Inferior Pubic Rami and Ischial Rami
Roof Boundary of Perineum?
Pelvic Floor
Base of Perineum?
Skin and Fascia
Which bony prominences separate each of the triangles of Perineum?
Ischial Tuberosities
A thin sheet of deep fascia stretches between right and left sides of the pubic arch, below the pubic symphysis.
What is the name given to this fascia?
Perineal Membran
External Anal Sphincter Action and Innervation
Relaxes from Tonic Contraction
Pudendal Nerve S2-4
Superficial Transverse Perineal Action and Innervation
Fixation and Stablisation of perineal Body
Pudendal Nerve S2-4
Deep transverse perineal action and innervation
Fixation and stablisation of perineal body. Expulsion of semen and urine.
Pudendal Nerve
External Urethral Sphincter Action and Innervation
Compress urethra to maintain urinary continence
Pudendal Nerve
Bulbospongiosus Male Action and Innervation
Compresses Penis Bulb and Contributes to Erection, Orgasm Contractions and Ejaculation
Pudendal Nerve
Bulbospongiosus Female Action and Innervation
Compresses Vestibular Bulb and Constricts Vaginal Orifice
Pudendal Nerve
Ischiocavernosus Male Action and Innervation
Stabilise erection by compressing corpus cavernosum
Pudendal Nerve
Ischiocavernosus (Female) Action and Innervation
Tense Vagina during Orgasm
Pudendal Nerve
There are 2 layers of fascia important as additional support for the pelvic organs within the perineum. What are they?
Presacral and Superior Fascia making up Pelvic Diaphragm.
Levator Ani and Coccygeus
Which structures pierce through the pelvic diaphragm?
Rectum
Urethra
Vagina
The urethra is longer in?
Males
What are the 3 parts of the male urethra?
Prostatic
Membranous
Spongy
Widest part of male urethra?
Prostatic
Narrowest part of male urethra?
Membranous
The Penis comprises of?
L+R Corpus Cavernosa
Single Corpus Spongiosum
Terminal part of Penis?
Glans Penis
Penis is covered by?
Prepuce
The Corpus Cavernosa is covered by fascial layer called?
Buck’s Fascia
The male urethra is transmitted through?
Corpus Spongiosum
The majority of the erectile tissue in penis is in?
Corpus Cavernosa
Sensory innervation of penis is through the?
Dorsal Nerve of Penis
The Dorsal Nerve of Penis is a branch of?
Pudendal Nerve
Where is the internal/vesical urethral sphincter found in both genders?
Junction of Urethra with Bladder
Innervation of internal/vesical urethral sphincter?
Involuntary
Pudendal Nerve S2-4
Where is the external urethral sphincter found in females?
Between Vaginal Orifice and Clitoris
Where is external urethral sphincter found in males?
Membranous level of Urethra
External Urethral sphincter innervation?
Voluntary
Deep Perineal Nerve S2-4
What is the collective name for the female external genitals?
Vulva
Name the contents of the Vulva?
Bartholian Gland Vestibule Mons Pubis Clitoris Labia Minora Labia Majora
The Vulva contents are supplied by?
Internal Pudendal Artery and Nerve
Bartholian Gland is supplied by?
Internal Pudendal Artery and Nerve
Vestibule in female is supplied by?
Internal Pudendal Artery and Nerve
Mons Pubis in female is supplied by?
Internal Pudendal Artery and Nerve
Clitoris is supplied by?
Internal Pudendal Artery and Nerve
Labia Minora and Majora are supplied by?
Internal Pudendal Artery and Nerve
What is the area that is enclosed by the labia minor called?
Vestibule
The vestibule contains the
terminal aspects of vagina and urethra
What mirrors the corpus cavernosa in the male but in female?
Clitoris
What is there no female equviilant that a male has?
Corpus Spongiosum
The Anal Triangle is the area between
Ischial Spines and Coccyx
The Internal Anal Sphincter is under what control?
Involuntary
The External Anal Sphincter is under what control?
Voluntary
Lateral to the anal canal and inferior to the pelvic floor are?
Ischio-Anal Fossa
What allows the anal canal to expand during defecation?
Ischio-Anal Fossa
A neuromuscular bundle enters the ischio-anal fossa through which foramen?
Lesser Sciatic Foramen
What structures in neuromuscular bundle in Ischio-Anal fossa?
Adipose
Pudendal Nerve and Internal Pudendal Artery and Vein
The Pudendal Nerve, Artery and Vein supplies?
External Genitals
External Urethral Sphincter and Anal Sphincter
Skin around Genitals
Perineum