BMS 590 Pelvis 1: Osteology, Arthrology, Pelvic cavity & Viscera

Pelvis

Name the part of the trunk inferoposterior to the abdomen

Pelvic cavity

Name the inferiormost part of the abdominopelvic cavity

Greater Pelvis (entrance way)

Lesser pelvis (exit way)

Name the divisions of the Pelvis

Pelvic inlet

The pelvis is divided in two based on the oblique plane of the _______ inlet.

Greater pelvis

This division of the pelvis is surrounded by the superior pelvic girdle and is occupied by inferior abdominal viscera

Lesser pelvis

This division of the pelvis is surrounded by the inferior pelvic girdle and is occupied by the pelvic cavity and perineum

Pelvic girdle

Name the ring of bones that connects the vertebral column to the 2 femurs

True

True or False: the Pelvic girdle is part of the appendicular skeleton

Bear the weight of the upper body

Transfer weight from axial skeleton to the LL

Provide attachment for the muscles of locomotion and posture, and those of the abdominal wall

Contain and protects inferior abdominal and pelvic viscera

Provides attachment for the muscles of the external genitalia

What are the functions of the Pelvic girdle?

Ilium

Ischium

Pubis

The pelvic girdle is formed by the fusion of which 3 hip bones and the sacrum?

Triradiate cartilage

Name the structure that separates the 3 hip bones during childhood at the acetabulum

Name the place where the 2 hip bones are joined anteriorly

Pubic symphysis

Ilium

Name the superior fan-shaped part of the hip bone

Ala of ilium

What is the name of the fan-shaped, upper part of the Ilium?

Pelvic brim:

bony edge defining the pelvic inlet

Body of ilium

What is the name of the handle-like part of the Ilium that narrows to form the acetabulum externally?

Iliac crest

Name the rim of the fan-shaped part of the Ilium

Iliac fossa

What is the name of the part of the Ilium formed by the anteromedial concave surface of the ala?

- spoon shaped

Auricular surface of the Ilium

This part of the Ilium forms a synovial articulation with the sacrum

Iliac tuberosity

This part of the Ilium forms syndesmotic articulation with sacrum

Body of ischium

This part of the Ischium helps form the acetabulum

Ramus of ischium

This part of the Ischium forms part of the obturator foramen

Ischial tuberosity

Name the large posteroinferior protuberance of the Ischium

Ischial spine

Name the small posteromedial projection, near the junction of body and ramus of the Ischium

Superior ramus

This part of the Pubis helps form the acetabulum

Inferior ramus

This part of the pubis helps form the obturator foramen

Pubic crest

Name the anterior thickening of the body of pubis

Pubic tubercle

The prominence on the body of pubis, lateral to the pubic crest

Acetabulum

What is the name of the cup-shaped socket that fits the head of femur?

Obturator foramen

A structure that is covered partially by the obturator membrane. Serves as a passage for the obturator n., a., and v.

Obturator Nerve

Obturator Artery

Obturator Vein

obturator foramen is a passage for what?

Greater sciatic notch

Name the structure that is between the posterior inferior iliac spine and ischial spine

Greater Sciatic Foramen

Greater sciatic notch + Sacrospinous ligament + Sacrotuberous ligament =

Greater sciatic notch

Sacrospinous ligament

Sacrotuberous ligament

List the 3 structures that form the border of the Greater Sciatic Foramen

Lesser sciatic notch

Name the structure that is located between the ischial spine and ischial tuberosity

Lesser Sciatic foramen

Name the structure formed by the borders of the Ischial spine, ischial tuberosity, lesser sciatic notch, and sacrotuberous ligament

Ischial spine

Ischial tuberosity

Lesser sciatic notch

Sacrotuberous ligament

List the borders of the Lesser Sciatic foramen

Pelvic inlet

Name the oval-shaped opening that is bounded by the Ala of sacrum, Arcuate line, and the Pecten pubis

Pecten pubis

Name the oblique ridge on the lateral aspect of superior pubic ramus

Ala of sacrum

Arcuate line

Pecten pubis

Pelvic brim

List the borders of the Pelvic Inlet

Pubic arch

Ischial tuberosities

Sacrotuberous ligaments

Tip of coccyx

The Pelvic outlet is bounded by which structures?

Pubic arch

Name the part of the Pelvis that is formed by the ischiopubic rami

- comprises the anterior boundary of the Pelvic outlet

Ischial tuberosities

Which structures form the lateral boundary of the Pelvic outlet?

Sacrotuberous ligaments

Name the structures located between the coccyx and ischial tuberosity that forms the posterolateral boundary of the Pelvic outlet

Tip of coccyx

What is the posterior boundary of the Pelvic outlet?

Pelvic brim

Name the bony edge that defines the pelvic inlet

Sacroiliac joints

Name of the joints that link the axial skeleton and inferior appendicular skeleton (LL)

Synovial

Syndesmosis

Sacroiliac joints is comprised of which 2 joint types?

Synovial joint

Name the specific joint type of the Sacroiliac joint that is anterior between auricular surfaces of ilium and sacrum

Syndesmosis joint

Name the specific joint type of the Sacroiliac joint that is posterior between the tuberosities of ilium and sacrum

Anterior sacroiliac

Interosseous sacroiliac

Posterior sacroiliac

Name the 3 ligament that mediates the transfer of body weight from the axial to the LL skeleton

Iliolumbar ligament

Name the ligament that is located between the ilium, sacrum, and L5 vertebra

Sacrotuberous ligament

Name the ligament that extends from posterior ilium and lateral sacrum and coccyx to ischial tuberosity

Sacrospinous ligament

Name the ligament that extends from lateral sacrum and coccyx to ischial spine

Pubic symphysis

Name the cartilaginous joint formed by the interpubic disc and ligaments

Interpubic disc

Name the disc that is located between the 2 pubic bones in the Pubic symphysis

Pubic symphysis

The Rectus abdominis and external oblique tendons: reinforce, which joint anteriorly?

Rectus abdominis and external oblique tendons

The Pubic symphysis is reinforced anteriorly by which 2 ligaments?

Superior and Inferior pubic ligaments

List the 2 ligaments of the Pubic symphysis

Superior and inferior pubic ligaments

Name the ligaments that connect the pubic bodies and interpubic disc superiorly and inferiorly

Terminal ureters

Urinary bladder

Rectum

Pelvic genital organs

Loops of small intestine (ileum)

Large intestine (appendix, cecum, and sigmoid colon)

List the contents of the Pelvis

Body and rami of pubic bones

Pubic symphysis

The Anteroinferior wall of the Pelvis is composed of which structures?

Obturator internus muscle

Obturator membrane

The Lateral wall of the Pelvis is composed of which structures?

Obturator internus muscle

Obturator membrane

Name the muscle and member and that covers and pads most of the lateral pelvic walls

Obturator nerve

Which nerve innervates the obturator internus muscle?

Rotates thigh laterally

What is the function of the obturator internus muscle?

Sacrum

Coccyx

Ligaments

Piriformis muscle

The Posterior pelvic wall is composed of which structures?

Piriformis muscle

Which muscle occupies most of the greater sciatic foramen?

Anterior rami of S1 - S2

The Piriformis muscle is innervated by which nerves?

Rotates thigh laterally

Abducts thigh

What is the function of the Piriformis muscle?

Pelvic diaphragm

The Pelvic Floor is formed by the __________ ____________.

Pelvic diaphragm

This structure divides the pelvis and perineum and stretches between the anterior, lateral, and posterior walls

Coccygeus muscle

Levator ani muscle

Which muscles comprise the Pelvic diaphragm?

Branches of S4 and S5 spinal nerves

The Coccygeus muscle is innervated by which nerves?

Inferior anal n. (S4) via coccygeal plexus

The Levator ani muscle is innervated by which nerves?

Levator Ani and Coccygeus muscle

Which muscles form the pelvic diaphragm (support viscera)

Puborectalis: medial

Pubococcygeus: intermediate

Iliococcygeus: posterolateral

List the 3 parts of the Levator Ani muscle.

Supravesical fossa

Name the Peritoneal reflection of peritoneum from Anterior Abdominal Wall onto the superior surface of the bladder

Rectovesical pouch

Pararectal fossae

Ureteric fold

List the 3 MALE peritoneal reflections

Rectovesical pouch

Name the reflection of peritoneum between the posterior surface of the bladder and the anterior surface of the rectum

- male

Pararectal fossae

Name the reflections of peritoneum that are depressions on each side of the rectum

- male

Ureteric fold

Name the reflected peritoneal ridge formed by the ureters

- male

Vesicouterine pouch

Rectouterine pouch

Pararectal fossae

Rectouterine folds

Broad ligament of uterus

Ureteric fold

List the Female peritoneal reflections

Vesicouterine pouch

Name the reflection of peritoneum between the bladder and the uterus

- female

Rectouterine pouch

Name the reflection of peritoneum between the uterus and the rectum

- female

Pararectal fossae

Name the peritoneal reflection that are lateral extensions of the rectouterine pouch on each side of the rectum

- female

Rectouterine folds

Name the peritoneal ridges formed by underlying fascial ligaments that demarcate the lateral boundaries of the pararectal fossae

- female

Broad ligament of uterus

Name the double peritoneal fold extending between the uterus and the lateral pelvic wall on each side.

- female

Contains

Uterine tubes

Ovaries

Ligaments of the ovaries

Round ligaments of the uterus

The Broad ligament of uterus contains which structures and organs?

Ureteric fold

Name the peritoneal ridge formed by the ureters.

L5 - S1

The Common iliac artery divides at the level of which vertebrae?

Internal and External Iliac arteries

The common Iliac artery divides into which two vessels?

Internal iliac artery

Name the main artery of pelvis that is medial to the external iliac vein and obturator nerve

-divides at greater sciatic notch

Umbilical a

Superior vesical a

Obturator a

Inferior vesical a. (M)

Vaginal a. (F)

Uterine a. (F)

Middle rectal a

Internal pudendal a

Inferior gluteal a

List the Anterior divisions of the Internal Iliac artery for both males and females

Vaginal a. (F)

Uterine a. (F)

Name the Anterior divisions of the Internal Internal Iliac artery that are unique to females

Inferior vesical a. (M)

Name the Anterior divisions of the Internal Internal Iliac artery that are unique to males

Umbilical artery

Name the Anterior division branch of the Internal Iliac artery that extends from fetus to placenta

Superior vesical artery

Name the Anterior division branch of the Internal Iliac artery that supplies the bladder and ductus deferens

Obturator artery

Name the Anterior division branch of the Internal Iliac artery that runs on lateral wall, between obturator nerve and vein

Inferior vesical artery (M)

Name the Anterior division branch of the Internal Iliac artery that supplies the bladder, ureters, seminal vesicle, and prostate in males