IV. Basic Osteology of the Vertebral Column, Sternum and Ribs: Vertebral Column: D) Sacrum. (Pg. 38) Flashcards
What is the typical number of segments that unite to form the adult sacrum?
5 segments
What forms the median sacral crest?
fused spinous processes and their spinous tubercles
What forms the intermediate sacral crest?
fused articular processes and their facets
What features may be identified along the intermediate sacral crest?
the mammillary process of S1 and the sacral cornu of S5
What does the sacral cornu represent?
the inferior articular process and facet of S5
What is the name of the inferior opening of the sacral spinal canal?
the sacral hiatus
What forms the lateral sacral crest?
the fused transverse 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 (infferolateral) sacral angle
From the anterior view, the intervertebral discs of sacrum will be replaced by what feature?
transverse ridges
What feature is identified on the lateral surface of S1-S3?
auricular surface
What feature does the anterior surface of the superior epiphyseal rim of S1 form?
the sacral promontory
What is the name given to the region of bone extending laterally from the S1 vertebral body looking from the base view?
sacral ala
What forms the sacral ala?
the costal element nad true transverse process
