Outline 12: the pelvis Flashcards by Nuna H

How many bones make up the pelvis

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what are the bones that make up the pelvis

2 os coxae and 1 sacrum

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the body of the sacrum articulates with what

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what is the sacral iliac joint

the line where the sacrum meet the os coxae

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compare and contrast the pelvic and pectoral girdle

the pelvic girdle compromises mobility for stability

the pectoral girdle compromises stability for mobility

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what is the acetabulum

it is the socket for the hip joint

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the acetabulum is analogous to what structure

the glenoid fossa (socket for the humerus)

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what three bones contribute to the acetabulum

ilium
ischium
pubis

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What bone is most superior in the pelvis

the ilium

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what part of the ilium contributes to the acetabulum

the body

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What has 3 gluteal lines on the posterior side

the ala

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what is the top of the ala

the iliac crest

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what is on the anterior superior end of the iliac crest

ASIS

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what is on the posterior inferior end of the iliac crest

PSIS

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what marks the beginning of the greater sciatic notch

PIIS

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what is inferior to ASIS anteriorly

AIIS

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what marks the connection between the ala and the body, where the angle of the ilium changes

the arcuate line

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what marks the top of the superior pubic ramus. This like extends medially towards the pubic tubercle

pecten

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what marks the lateral boundary of the pelvic inlet

linea terminalis (iliopectineal line= arcuate line + pecten)

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What part of the ischium contributes to the acetabulum

the body

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what is the medial projection of the ischial ramus

Ischial spine

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what is the inferior terminus of the ischial ramus

ischial tuberosity

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what demarcates the boundary between the greater sciatic notch and the lesser sciatic notch

the ischial spine

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what contributes to the acetabulum in the pubis

the superior ramus

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Does the body of one pubis meet the body of the second at any point? If so, where?

Yes; at the pubic symphysis

what is the top of the body of the pubis

the pubic crest

what is the boundary between the body and the superior ramus of the pubis

the tubercle of the pubis

Which structure meets the ischium at the ischial tuberosity?

Inferior pubic ramus

what meets anteriorly at the pubic symphysis

os coxae

the os coxae articulate posteriorly with ______

sacrum

The obturator foramen is between which two bones?

Between pubis and ischium

what is the obturator foramen covered by

the obturator membrane

The small opening in the Obturator membrane is called (X). What travels through it?

X = Obturator canal obturator nerves and vessels run through

the ASIS is horizontally in the same plane as the ______

PSIS

the ASIS is vertically in the same plane as _______

pubic tubercle

What marks the upper border of the pelvis

the pelvic brim/aperture/inlet

what is the lateral border of the pelvic inlet

iliopectineal line

what is the posterior border of the pelvic inlet

sacral promontory

what is the anterior border of the pelvic inlet

top of pubis

where is pelvis major and why is it "false pelvis"

it is between the ala of the ilium and above the pelvic inlet. So it is actually in the abdomen

what is the anterior border of pelvis major

abdominal wall

what is the lateral border of pelvis major

iliac fossae

what is posterior border of pelvis major

L5 and S1

what is the true pelvis

pelvis minor

what is the superior border of Pelvis Minor

pelvic inlet

what Is the inferior border of pelvis minor

pelvic diaphragm

what is the posterior border of pelvis minor

sacrum and coccyx

what is the anterior border of pelvis minor

pubis

what is the lateral border of pelvis minor

obturator internus

what are the contents of pelvis minor

bladder, rectum, urinary ducts, prostate, ovaries, uterus, vagina

where is the pelvic diaphragm suspended

inferior pelvic aperture/ pelvic outlet

what is the external surface of the pelvic outlet

perineum

what does the perineum contain

external genitilia

what is on the outside of the obturator membrane

obturator internus

name 3 ways the female pelvis is different from the male pelvis

wider pubic arch with shallower subpubic angle larger pelvic inlet thinner bone in iliac fossae

what are the two joints in the vertebral column (in the pelvic area)

L5:sacrum sacrum:coccyx

what kind of joint(s) is/are found between L5:sacrum

Anterior: symphysis between the bodies Posterior: plane between the arches

what kind of joint(s) is/are found between the sacrum:coccyx

only symphysis joints (because the arches and the bodies of the sacrum are fused)

Which ligaments are like a continuation of the Anterior Longitudinal Ligament and Posterior Longitudinal Ligament? They act to:

Sacrococcygeal ligaments; reinforce the vertebrae/sacrum/coccyx

How many pelvic joints are there? Name them

3 total (1) pubic symphysis (2) sacro-iliac joints

The pubic symphysis joint is (anterior/posterior), between which bones?

anterior; the two os coxae

what two ligaments reinforce the pubic symphysis joints?

superior pubic ligament | arcruate pubic ligament

what does the superior pubic ligament connect

pubic tubercles

what do the arcuate pubic ligaments connect

os coxae

the sacro-iliac joints are (anterior/posterior) and come between which bones

posterior; os coxae and the sacrum

list the things that contribute to the stability of the sacro-iliac joints

the irregularities on the sacrum surface the wedge shape of the sacrum ligaments

what kind of joint is the sacro-iliac joint

plane joint (diarthrosis covered by hyaline cartilage)

what two ligaments reinforce the joint capsule of the sacro-iliac joint

ventral/anterior Sacroilial ligaments | posterior sacroiliac ligaments

What is the strongest ligament

interosseous Sacroiliac ligament

where are the interosseous sacroiliac ligaments?

????????? | BETWEEN THE BONES OF THE OS COXAE AND SACRUM BUT WHERE EXACTLY AND WHY ISNT THIS PART OF THE JOINT CAPSULE???

what prevents lumbar vertebrae from sliding forward on the sacrum

iliolumbar ligaments

what does the iliolumbar ligament connect

ilia to the transverse processes of L5

what does the sacrotuberous ligaments connect

posterior sacrum to ischial tuberosity

what do the sacrospinous ligaments connect

anterior sacrum to ischial spine

what demarcates the greater and lesser sciatic notches

the ischial spine

What (enter(s)/exit(s)) the pelvis through the greater (Y)?

Sacral plexus nerves; exit pelvis; Y = sciatic foramen

The lesser (X) serves as an (entry into/exit out of) the pelvis for...

X = sciatic foramen; entry into pelvis; pudendal nerve and nerve to obturator internis