Flashcards in Sacrum Deck (23):
What is the typical number of segments that unite to form the adult sacrum?
An imaginary line drawn along the dorsal midline of sacrum is IDed as the____?
Median sacral crest
What forms the median sacral crest?
Fused spinous processes and their spinous tubercles
An imaginary line drawn form the superior articular process of S1 to the sacral Cornu will form what feature?
Intermediate sacral crest
What forms the intermediate sacral crest?
Fuse articular processes and their facets
What features may be IDed along the intermediate sacral crest?
The mammillary process of S1 and the sacral Cornu of S5
What is the remnant of the inferior articular process and facet of S5?
The sacral Cornu
What is the name of the inferior opening of the sacral spinal Canal?
The sacral hiatus
An imaginary one drawn form the transverse process of S1 to the inferior lateral sacral angle will form what feature?
The lateral sacral crest
What forms the lateral sacral crest?
The used traverse processes and transverse tubercles from S1 to S5
What is the sacral tuberosity?
The enlarged transverse tubercle of S2
What feature is associated with the transverse tubercle of S5?
The inferior and lateral (inferolateral) sacral angle
From the anterior view, the intervertebral discs of sacrum will e replied by what feature?
What is the name given to the openings that rains it the ventral sacral nerve rami/
Anterior sacral foramina, ventral sacral foramina, or ventral pelvic foramina
What feature is IDed on the lateral surface of S1-S3?
What feature does the anterior surface of the superior epiphyseal rim of S1 form?
The sacral promontory
What is teh sacral promontory?
The buldging anterior surface of the superior epiphyseal rim of S1
What is the name given to the region of bone extending laterally form the S1 vertebral body looking form the base view?
What forms the sacral ala?
The costal element and true transverse process
What part to eh sacral ala is derived from the costal element?
The anterior two-thirds
What is the typical number of segments that unite to form the adult coccyx?
What bony features are present on the coccyx?
All segments are represented by a "vertebral body"; in addition, Co1 has a coccygeal Cornu and transverse process.