Pelvic region Flashcards
The primary functions of the lower extremity are:**
- Support the weight of your body
- Provide a stable foundation when you stand
- Allow locomotion like running and walking
What articulates with the innominate bone?
sacrum, femur, and the other innominate bone
Each innominate bone consists of three parts, what are they?
Ilium, ischium and pubis
What receives the head of the femur to form the hip joint?
Acetabulum
Horse shoe shaped articular surface is the ?
Lunar surface
what is the rough non-articular center portion of the acetabulum?
acetabular fossa
outside edge of the acetabulum
acetabular rim
inferior opening of the acetabular rim
acetabular notch
acetabular notch (which is bridged by a piece of connective tissue known as the
transverse acetabular
ligament
largest and uppermost portion of the PELVIC BONE
Ilium
three oblique lines on the external or
lateral surface of the ilium and they indicate the bony origins of the gluteal muscles
anterior, posterior and inferior gluteal lines
internal or medial surface of the ilium is known as the
iliac fossa
posterior to the iliac fossa are two distinct areas—the most superior of these is known as the
iliac
tuberosity (an area where ligaments attach)
posterior to the iliac fossa are two distinct areas—the more inferior of these surfaces
aurticular surface
where each innominate articulates with the sacrum
inferior to the iliac fossa is a curved line that marks the boundary between the
major or false pelvis from the minor or true pelvis
arcuate line
The arcuate line from each innominate forms what is
known as the
pelvic brim
the superior border of the ilium is known as the
iliac crest
the superior border of the ilium is known as the iliac crest, which terminates anteriorly as the
anterior
superior iliac spine and the anterior inferior iliac spine
the superior border of the ilium is known as the iliac crest, the crest terminates posteriorly as the
posterior
superior iliac spine and the posterior inferior iliac spine
a distinct bump that is found on the lateral most aspect of the iliac crest
iliac tubercle
just inferior to the posterior inferior iliac spine is a deep notch known as the…..
greater sciatic notch
an “L” shaped bone which consists of a body and ramus
Ischium
portion of the ischium that enters into the formation of the acetabulum
The Body
small projection of the ischium body is known as the
ischial spine
small notch just below the ischial spine
lesser sciatic notch
inferior to the lesser sciatic notch is a large roughened area that bears the weight of the body when sitting. (the hamstring muscles
originate from this tuberosity)
the ischial tuberosity
What is the most inferior portion of the ischium?**
Ramus
consists of a body and two rami
Pubis
the medial body (of the pubis) consists of the…..
symphyseal surface (pubis symphysis) which articulates with the pubis from the opposite innominate
the superior aspect of the pubis body
pubic tubercle
a line going from the pubic
tubercle to the symphyseal surface
pubic crest
superior ramus is above the body of the pubis and terminates as the
iliopubic eminence
prominent ridge on the superior ramus of the pubis is the
pubic pecten
extends posterior and inferior from the body of the pubis to join the ramus of the ischium
inferior ramus
large oval opening found at the inferior aspect of each innominate
Obturator Foramen
an indentation found at the superior anterior border of the Obturator Foramen
obturator groove
The Obturator Forman is closed by a piece of connective tissue known as the**
Obturator membrane
What is bounded posteriorly by the lumbar vertebrae, laterally by the ilium and anterior by the abdominal wall? it helps to support and protect much of the abdominal viscera**
False (major) pelvis
What is bounded posteriorly by the sacrum and coccyx, laterally and anteriorly by the ilium, ischium and pubis? This portion surrounds the birth canal in females**
True (minor pelvis)
Functions of the Pelvic Bone**
- Protect pelvic viscera
- Transmit body weight to the limbs and absorb the stresses of muscular activity
- allow locomotion by causing pelvic bone to swing from side to side
- In the female, provides the bony support for the birth canal
a common painful contusion injury of the soft tissue associated with the iliac crest
They are very common in contact sports and usually result in a painful hematoma in the area of the injury
Hip pointers
can result from direct trauma to the bone (i.e. automobile accidents) or can be caused by
forces transmitted to the bone during a fall on the feet or knees
Fractures of the Pelvis
features of the Pelvic bone that are most prone to fracture include the:
pubic rami, acetabulum (or the
area immediately surrounding it), region of the sacroiliac joint and the most lateral aspect of the ilium
from three primary centers (one each for the ilium, ischium and pubis)
five secondary centers (one each for the iliac crest, anterior inferior iliac spine, ischial tuberosity, pubis
symphysis and center of the acetabulum
bone completes its ossification between 20 and 22 years of age
Ossification of the Pelvic Bone
