Pelvis and Perineum Session 4 Flashcards
Name the 2 triangles the perineum divided into
Anterior urogenital triangle
Posterior anal triangle
Which bony prominences separate each of the triangles
Ischial tuberosities
What is the main action of the external anal sphincter
Constricts anal canal
What is the main action of the superficial transverse perineal
Support and fix perineal body
What is the main action of the deep transverse perineal
Support and fix perineal body
What is the function of the external urethral sphincter
Compress urethra to maintain urinary continence
What is the function of the Bulbospongious in males
Compress bulb of penis to expel last drops of urine and semen
What is the function of the Bulbospongiosus in female
Assists in erection of clitoris
What is the function of Ischiocavernous in males
Maintains erection of penis by compressing outflow veins
What is the function of the ischiocavernous in females
Maintains erection of clitoris by compressing outflow veins and pushing blood from root of clitoris into body
What strutures pierce through the pelvic diaphragm
Urethra
Vagina (female)
Describe the parts of the urethra in males
Prostatic
Membranous
Spongey
What is the widest part of the urethra
Prostatic
What is the narrowest part of the urethra
Membranous
The corpus cavernous is covered by a fascial layer called the ____
External fascia of Colles
The urethra is transmitted through the____
Corpus spongiosum
The majority of the erectile tissue in the penis is in the ___
corpus cavernous
Where is the internal/vesical urethral sphincter located?
the internal urethral orifice in the trigone of the bladder to the external urethral orifice in the middle of the vulva
Is the internal/vesical urethral sphincter voluntary or involuntary
Involuntary smooth muscle
What is the innervation of the internal/vesical urethral sphincter
T11-L2 (Autonomic)
S2-S4 (parasympathetic)
Where is the external urethral sphincter found in females
Located distally and inferiorly to the bladder neck in women between the vaginal orifice and clitoris
Where is the external urethral sphincter found in males
Inferior to the prostate
Is the external urethral sphincter voluntary or involuntary
Voluntary skeletal muscle
What is the innervation of the external urethral sphincter
Pudendal nerve S2-S4
Name the 6 contents of the vulva
Mons pubis Labia majora Labia minora Vestibule Bartholins gland Clitoris
The structures of the vulva are innervated by which nerve
Pudendal nerve
What artery supplies the structures of the vulva
Internal pudendal artery
What 2 structures does the vestibule contain
Terminal aspects of the vagina and urethra
What is the anal triangle
Area between the ischial spines and coccyx
What structures do the pudendal nerve, artery and veins supply
Bulb of penis
Bulb of vestibule
Greater vestibular gland
