Pelvis and Perineum Flashcards
The Perineum lies inferior to
Pelvic Diaphragm
Which bony prominences seperate each of 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 Membrane
External Anal Sphincter action
Relaxes from tonic contraction
Superficial Transverse Perineal Muscle action
fix/stabilise perineal body
Deep Transverse Perineal muscle action
fix/stabilise perineal body and expulse semen and urine
External Urethral Sphincter muscle action
compress urethra to maintain urinary continence
Bulbospongiosus male muscle action
compress penis bulb and erection
Bulbospongiosus female muscle action
compress vestibular bulb and constrict vaginal orifice
Ischiocavernosus male muscle action
stabilise erection by compress corpus cavernosum
Ischocavernosus female muscle action
tense vagina during orgasm
What is the Innervation of
External Anal Sphincter Superficial Transverse Perineal Deep Transverse Perineal External Urethral Sphincter Bulbospongiosus Ischiocavernosus
Branches of Pudental Nerve S2-4
Which 2 layers of fascia are important as additional support for pelvic organs within perineum
Presacral and Superficial Fascia
What structures pierce through pelvic diaphragm
Urethra and Vagina
Is the urethra longer or shorter in males
Longer
What are the 3 parts of male urethra
Prostatic
Membranous
Spongy
What is the widest part of male urethra
Prostatic
What is the narrowest part of male urethra
Membranous
The penis comprises of the
Left and Right Corpus Cavernosa
Single Corpus Spongiosum
The terminal aspect of penis is
Glans Penis
The prepuce is also known as
Foreskin
The corpus cavernosa is covered by fascial layer called
Bucks Fascia
The urethra is transmitted through
Corpus Spongiosum
The majority of erectile tissue in the penis is in the
Corpus Cavernosa
Sensory Innervation of the penis is through the dorsal nerve of the penis a branch of the
Pudental Nerve
The Urethra in females opens directly in front of the
Vagina
Where is the internal/vesicle urethral sphincter
Junction of Urethra with Bladder
What is the internal/vesicle urethral sphincter innervation
Involuntary
Pudental Nerve S2-4
Where is the external urethral sphincter found in females
Distal and Inf to Bladder neck
Where is the external urethral sphincter found in males
Membranous Urethra Level
What is External Urethral Sphincter innervation
Voluntary
Perineal Nerve S2-4
What is the collective term for female external genitals
Vulva
Contents of Vulva (5)
Mons Pubis Labia Majora and Minora Vestibule Bartholian Glands Clitoris
The Vulva contents
Mons Pubis Labia Majora and Minora Vestibule Bartholian Glands Clitoris
are innervated by
Pudental Nerve and Internal Pudental Nerve
Vulva contents are innervated by
Pudental Nerve and Internal Pudental Nerve
Bartholian Glands are innervated by
Pudental Nerve and Internal Pudental Nerve
The vestibule is the area enclosed by
Labia minora and contains terminal vaginal and urethra
What is the erectile tissue in female
Clitoris
The clitoris lies in the
Anterior Labial Commisurre
The anal triangle is the area between the
Ischial Spine and Coccyx
Which triangle contains anus
Anal Triangle
Which 2 sphincters control defecation
Internal and External
The external anal sphincter is under
voluntary control
The internal anal sphincter is under
involuntary control
Lateral to the anal canal and inferior to the pelvic floor are the 2 fat containing fossa called
Ischio-Anal (Ishcio-Rectal Fossa)
A neurovascular bundle enters ishcio-anal fossa through the
Lesser Sciatic Foramen
What structures are present in Neurovascular Bundle in Ischio-anal fossa (4))
Adipose, Pudental Nerve, Int Pudental Artery and Vein
