Pelvic Girdle - Class #2 Flashcards
the two bones that make up the pelvic girdle
innominate bones
the bony pelvis is made up of what 3 things?
1) sacrum
2) Coccyx
3) innominates
What are the 3 functions of the pelvis?
1) protection (abdomen and reproductive organs)
2) weight bearing
3) locomotion
what is the superior part of the innominate bone?
ilium
what is the inferior and posterior part of the innominate bone?
ischium
what is the inferior and anterior part of the innominate bone?
pubis
three bones meet at a large depression called the ______
acetabulum
3 facts about the acetabulum?
1) where 3 bones fuse
2) found on the external surface of the innominates
3) “socket” of the hip joint
fossa
hollow/depressed
tuberosity
large rounded elevation
notch
indentation at the end of bone
where is the attachment for the iliac muscle?
iliac fossa
spine
thorn-like projection
tubercle
small, raised part of bone (for ligament attachment)
ramus
bar of bone
foramen
hole or passageway through bone
acetabulum
where ilium, ischium and pubis meet
what surface of the innominate bone is the acetabulum found on?
external
which bony landmark is covered by the acetabular labrum
lunate surface
4 ways to identify the orientation of innominate bone
1) superiorly - iliac crest
2) inferiorly - obturator foramen
3) posteriorly - sciatic notch
4) laterally - acetabulum
crest
ridge of bone
line
linear elevation
5 fused vertebral bones, form the triangular shaped _____
sacrum
where is the sacrum located
posteriorly, between the innominate bones
is the sacrum convex or concave posteriorly
convex
the base of the sacrum articulates with what?
the disc of lumbar vertebrae #5
where is the sacral promontory located
directly under the base of the sacrum (on the anterior side)
where are the exits for nerves and blood vessels on the anterior surface of the sacrum?
anterior sacral foramina
auricular surface
ear shaped
what is analogous to spinous processes of vertebrae?
medial sacral crest
_____ is the enclosed passageway of the sacrum that houses nerves
sacral canal
what is the better name for the “tailbone”
coccyx
_____ is inferior to the sacrum
coccyx
___ fused vertebral bones make up the coccyx
4
why is the bony pelvis made up of large and heavy bones?
for weight bearing and locomotion
what complete shape does the bony pelvis form and why
complete circle and protects internal organs