Sacral Review: Joy Lecture Flashcards
List the major anterior sacral anatomic landmarks
Sacral base
sacral promontory
sacral apex
List the major sacral posterior anatomic landmarks
Inferior lateral angle
coccyx
The _____ is the lowest part of the spinal column, four vertebra, some fused, some not.
coccyx
________ ______ separate adjacent sacral segments. These fuse sequentially after puberty, beginning with the lowest segments and working up.
Epiphyseal plates
What are the bony articulations of the sacrum?
The fifth lumbar vertebrae superiorly
the coccyx inferiorly
two os coxae (innominates) through the SI articulations
True/False: After puberty females have more well developed and strong SIJ ligaments
False: men do, females need them to be mobile for childbirth… yikes.
What is added to the iliac surface in the second decade of life that becomes further pronounced into the third decade, limiting mobility of the joint?
Crescent shaped ridge develops along the iliac surface that interdigitates with a depression on the sacral side
What type of joint is the SI joint?
Diarthroidal
The ______ ______ is Anteriorly smooth, Posteriorly fibrous, giving
ligaments, and has Fibrocartilage
Iliac surface
Which surface of the sacrum is being described:
generally smooth
hyaline cartilage
decreases in width interiorly and is wedged between the two ilia
Sacral surface
This ligament is made up of Inferior fibers, from the third and fourth sacral segments, ascend to the PSIS and posterior end of the internal lip of the iliac crest.
Posterior sacroiliac ligament
This ligament Connects the third sacral segment to the lateral side of the pre-auricular sulcus
anterior sacroiliac ligament
This ligament connects the PSIS to the lateral aspect of the third and fourth sacral ligaments
Long dorsal SI ligament
This ligament becomes stretched when the sacrum is rotated in a posterior manner relative to the ilium (counternutation), as in:
• The early stages of pregnancy
• Aging & degenerative changes
• Backward torsions or unilateral/bilateral sacral extensions
Long dorsal SI ligament
This ligament
Runs from lower sacral tubercles to ischial tuberosity
Gluteus maximus attachment
Tendon of the biceps femoris attachment
Connects with fascia of the pelvis
STL