Boney Pelvis and Anal Triangle

What is indicated by A?

Iliac crest

What is indicated by B?

Iliac wing

What is indicated by C?

Ilium, body

What is indicated by D?

Ischial spine

What is indicated by E?

Ischium, body

What is indicated by F?

Ischial ramus

What is indicated by G?

Acetabulum

What is indicated by H?

Pubis, body

What is indicated by I?

Superior pubic ramus

What is indicated by J?

Inferior pubic ramus

What is indicated by K?

Ischial tuberosity

What is indicated by L?

Obturator foramen

What is indicated by A?

Posterior superior iliac spine

What is indicated by B?

Posterior inferior iliac spine

What is indicated by C?

Greater sciatic notch

What is indicated by D?

Lesser sciatic notch

What is indicated by E?

Obturator foramen

What is indicated by F?

Anterior superior iliac spine

What is indicated by G?

Anterior inferior iliac spine

What is indicated by H?

Acetabulum

What is indicated by I?

Ischiopubic ramus

What is indicated by A?

Iliac fossa

What is indicated by B?

Anterior superior iliac spine

What is indicated by C?

Anterior inferior iliac spine

What is indicated by D?

Arcuate line

What is indicated by E?

Pectineal line

What is indicated by F?

Symphyseal surface (pubic symphysis)

What is indicated by G?

Auricular surface

What is indicated by H?

Greater sciatic notch

What is indicated by I?

Ischial spine

What is indicated by J?

Lesser sciatic notch

What is indicated by K?

Ischial tuberosity

What is indicated by L?

Obturator foramen

What is indicated by A?

Ala (wings)

What is indicated by B?

Anterior sacral foramina

What is indicated by C?

Coccyx

What is indicated by D?

Sacral promontory

What is indicated by E?

Auricular surface

What is indicated by F?

Posterior surface

What is indicated by G?

Anterior surface

What is indicated by A?

Auricular surface

What is indicated by B?

Posterior sacral foramina

What is indicated by C?

Sacral cornu

What is indicated by D?

Coccyx

What is indicated by E?

Sacral canal

What is indicated by F?

Auricular surface

What is indicated by G?

Lateral sacral crest

What indicated by H?

Median sacral crest

What is indicated by I?

Sacral hiatus

What is considered the greater (false) pelvis?

Superior to pelvic inlet (iliac blades, surrounds inferior abdominal viscera)

What is considered the lesser (true) pelvis?

Inferior to pelvic inlet (boney structures surround the pelvic cavity and house the pelvic viscera)

What is the sacroiliac joint?

Synovial joint located at the articulation of the sacrum and ilium

What is the pubic symphysis?

Cartilaginous joint, consisting of a fibrocartilaginous disc and ligaments uniting the two pubic bones

What is the subpubic angle?

Angle formed by the union of right and left pubic bones

What is indicated by A?

Sacroiliac joint

What is indicated by B?

Subpubic angle

What is indicated by C?

Pubic symphysis

What is indicated by A?

Iliolumbar ligaments

What is indicated by B?

Anterior sacroiliac ligaments

What is indicated by C?

Sacrotuberous ligament

What is indicated by D?

Inguinal ligament

What is indicated by E?

Sacrospinous ligament

What is indicated by F?

Obturator membrane

What is indicated by A?

Iliolumbar ligaments

What is indicated by B?

Posterior sacroiliac ligaments

What is indicated by C?

Sacrospinous ligament

What is indicated by D?

Sacrotuberous ligament

What is indicated by A?

Superior pubic ligament

What is indicated by B?

Inferior (arcuate) pubic ligament

In anatomical position, what are in-line with each other?

ASIS and pubis

The pelvic girdle is titled…?

Anteriorly

What are the characteristics of an estrogen-driven pelvis?

Oval and rounded, wide pelvic inlet with a short greater pelvis

What are the characteristics of a testosterone-driven pelvis?

Heart-shaped, narrow pelvic inlet with a tall greater pelvis

What are the contents of the pelvic cavity?

Inferior portion of ureters, urinary bladder, rectum, pelvic genital organs, blood vessels, lymphatics, and nerves

What are the borders of the pelvic cavity?

Pelvic inlet and pelvic outlet

What forms the floor of the pelvic cavity?

Pelvic diaphragm

What is the action of the obturator internus?

Lateral rotation of the thigh, holds head of femur in acetabulum

What innervates the obturator internus?

Nerve to obturator internus (L5, S1, S2)

What is the action of piriformis?

Lateral rotation and abduction of thigh; holds head of femur in acetabulum

What innervates piriformis?

Anterior rami of S1 and S2

What is indicated by A?

Obturator internus

What is indicated by B?

Piriformis

What muscles are considered the pelvic diaphragm?

Coccygeus and levator ani

What is the innervation of coccygeus?

Nerve to coccygeus (S4-S5)

What are the muscles of the levator ani?

Iliococcygeus, pubococcygeus, and puborectalis

What innervates the levator ani muscles?

Nerves to levator ani (S3-S4) and coccygeus (S4-S5)

What is indicated by A?

Coccygeus

What is indicated by B?

Iliococcygeus

What is indicated by C?

Pubococygeus

What is indicated by D?

Puborectalis

What is indicated by A?

Piriformis

What is indicated by B?

Coccygeus

What is indicated by C?

Iliococcygeus

What is indicated by D?

Pubococcygeus

What is indicated by E?

Obturator internus

What is indicated by F?

Puborectalis

What is indicated by AA?

Anal aperture

What is indicated by UH?

Urogenital hiatus

What are the characteristics of puborectalis?

Most medial of the levator ani group, forms a U-shaped sling around anorectal angle, acts as a sphincter, maintains fecal continence

What is the function of the pelvic diaphragm?

Support pelvic viscera, separates pelvis from perineum, raises pelvic floor, acts as a sphincter, has both motor and sensory innervation