30 Questions
What is the function of the hip bones in the pelvic region?
Transferring weight between lower limbs and trunk
Which ligament runs from the sacrum to the ischial spine in the pelvis?
Sacrospinous ligament
Which structure allows passage of structures from the lesser pelvis to the gluteal and perineum regions?
Greater sciatic foramen
What does Relaxin do in relation to pelvic ligaments during pregnancy?
Loosens pelvic ligaments
What is the angle of the pubic arch in males?
50° - 60°
What differentiates the female and male bony pelvis according to sexual dimorphism?
Female pelvis has a narrow, deep lesser pelvis; male pelvis has a wide, shallow lesser pelvis
Which nerve primarily innervates the levator ani?
Pudendal nerve
What is the main function of the levator ani muscle?
Supports the organs in the pelvis
Which structure does the piriformis muscle form a thickening of?
Obturator fascia
What defines the perineal body?
Convergence of several sphincter and perineal pouch muscles
Which structure allows urogenital viscera to pass from the pelvic cavity to the perineum?
Urogenital hiatus
What is the significance of relaxing the levator ani muscle?
Promotes urination and defecation
Which artery supplies the inferior bladder, prostate, seminal vesicles, cervix, and vagina?
Middle rectal artery
Which artery wraps around the sacrospinous ligament and supplies perineal structures?
Obturator artery
Which division of the internal iliac artery is discussed in more detail in future lectures?
Posterior division
Which artery passes through the obturator canal to the medial thigh?
Internal pudendal artery
What type of nerves provide motor and general sensation to the perineum and pelvic walls?
Somatic nerves
Which artery supplies the superior bladder?
Anterior division of the Internal Iliac Artery
Which nerve supplies the somatic innervation of the perineum?
Pudendal nerve
What is the course of the pudendal nerve as it exits the pelvic cavity?
Enters the greater sciatic foramen
Which plexus provides autonomic innervation of the pelvis?
Inferior hypogastric plexus
Where do some fibres from the pelvic splanchnic nerves pass to supply hindgut organs?
Superior hypogastric plexus
Which muscles are supplied by the pudendal nerve?
Muscles of anal and urogenital triangle
What sensation is supplied by the pudendal nerve?
Sensation of external genitalia and skin of perineum
What region of the spinal cord do visceral afferent fibers from pelvic viscera in contact with peritoneum follow?
T12-L2
Which nerve provides retroperitoneal parasympathetic fibers in the pelvis?
Hypogastric nerve
Which spinal cord regions do visceral afferent fibers from pelvic viscera not in contact with peritoneum follow?
S2-S4
Where are the pelvic sub-plexuses located?
Lateral to rectum
Which autonomic nerve innervates the lower thoracic and upper lumbar spinal cord regions?
Sacral splanchnic nerve
What is the general rule regarding visceral afferent fibers above the pelvic pain line?
They follow sympathetics
Learn about the structures, bones, muscles, vessels, and innervation of the pelvic region in this comprehensive lecture by Mr. Luke Reid. Enhance your knowledge of the lesser and greater pelvis, pelvic floor, and more.
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