| Question |
Answer |
| What is made up of five fused vertebrae and is triangular in shape? |
Sacrum |
| What are the functions of the sacrum? |
Provide stability and transmit weight to pelvis |
| What part of the sacrum articulates with the coccyx? |
Inferior part of the Apex |
| What part of the sacrum articulates with last lumbar vertebrae? |
Superior part of the base |
| The transverse ridges of the anterior sacrum seperate what? |
The sacral bodies |
| Anterior and inferior mvmt of the promontory is called? |
Nutation |
| Posterior and superior mvmt of the promontory is called? |
Counternutation |
| The lateral sacrum has an auricular surface that has __________ and is _________. |
hyeline cartilage, irregular |
| The ala of the sacrum is continuous with the what? |
Ilium |
| The lumbosacral angle consists of? |
the Long axis of lumbar vertebrae and Long axis of sacrum |
| What is the range of the lumbosacral angle? |
130-160 degrees |
| The coccyx consists of? |
Four fused vertebrae |
| The innominate is fromed by fusion of the ______,________, and ________. |
Ilium, ischium, pubis |
| What are two characteristics of the auricular surface of the ilium? |
it has hyaline cartilage, and an irregular surface. |
| What are the functions of the pelvis? |
Protect and support viscera, Supports body weight in standing and sitting,Attachment for muscles and ligaments |
| The median sacral crest corresponds to what part of the lumbar vertebrae? |
Spinous process |
| The intermediate sacral crest corresponds to what part of the lumbar vertebrae? |
articular process |
| The lateral sacral crest corresponds to what part of the lumbar vertebrae? |
Transverse process |
| The area lateral to median sacral crest corresponds to what part of the lumbar vertebrae? |
Lamina |
| The dorsal sacral foramina correspond to what part of the lumbar vertebrae? |
intervertebral foramina |
| The lumosacral joint is between what structures? |
the last lumbar vertebrae and the 1st sacral vertebrae |
| The superior surface of the sacrum is how many degrees from horizontal? |
30° |
| What direction do the S1 facets face? |
Posteriomedially |
| Why to the S1 facets face the direction that they do? |
for better stability |
| Iliolumbar ligaments run from TP of _______ to _______. |
L4\L5, Iliac crest |
| What are the primary sacroiliac ligaments? |
Anterior, posterior, and interosseous. |
| Of the sacroiliac ligaments which are strong? |
posterior and interosseous |
| What are the motions of the lumbosacral joint? |
flexion, extension, lateral flexion, and minimal rotation |
| The anterior sacroiliac ligaments are ______(weak or strong)? |
Weak |
| What are the attachments of the anterior SI ligaments? |
the ala and pelvic surface of the sacrum to the auricular surface of the ilium |
| What are the attachments for the Long and Short Posterior SI Ligaments? |
Intermediate and lateral sacral crest of sacrum to the PSIS and inner lip of iliac crest |
| Which SI ligaments are the strongest? |
Interosseus |
| What are the attachments of the interosseous SI ligaments? |
Lateral sacral crest to Iliac tuberosity (tuberosity of ilium). |
| What is the function of the long and short posterior SI ligaments? |
to prevent counter nutation |
| What is the function of the interosseus SI ligaments? |
to prevent nutation |
| What are the accessory SI ligaments? |
sacrotuberouse and sacrospinous |
| What motion do sacrotuberous and sacrospinous prevent? |
nutation |
| Sacrotuberous attachments are? |
Sacrum, ilium, coccyx to Ischial tuberosity |
| Sacrospinous attachments are? |
Sacrum and coccyx to Ischial spine |
| Is sacrospinous deep or superficial to sacrotuberous? |
deep |
| What Structures entering\leave the pelvis via the greater sciatic foramen? |
Piriformis & Sciatic nerve |
| What structures enter\leave the perineum via the lesser sciatic foramen? |
pudendal nerve |
| SI joint stability is provided by what? |
SI ligaments, auricular surface irregularities and wedging |
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HHS Shrek
