Sacrum Flashcards
What part of the sacral ala is derived from the costal elemene
the anterior two thirds
the costal element and true transverse process of sacrum unite to form what feature
the sacral ala
how many firbrous (amphiarthrosis) syndesmosis joint surfaces are present on the S1 vertebral body
4
how many joint surfaces are present on the vertebral body of the first sacral segment
5
what muscles may attach to the first sacral vertebral body
psoas major
What is the reported angulation of the first sacral articular facets
they lie vertically in the coronal plane
what is the position of the sacral zygapophysis in adults
the zygapophysis lies in the coronal plane for L5/S1
What is the orientation of the first sacral superior articular facet
BUM backward upward and medial typically concave
what is the name given to the projection on the first sacral superior articular process
mammillary process
from the anterior view the intervertebral discs of sacrum will be replaced by what feature
transverse ridges
An imaginary line drawn along the dorsal midline of sacrum is identified as the
median sacral crest
what forms the median
fused spinous processes and their spinous tuvercles
What is the name given to the congenital condition in which the fifth lumbar spinous process is elongated the sacrum exhibits spina bifida and dorsiflexion produces pain
Knife clasps syndrome
an imaginary line drawn from the superior articular process of S1 to the sacral cornu will form what feature
intermediate sacral crest
What forms the intermediate sacral crest
fused articular processes and their facets
what features may be identified along the intermediate sacral creste
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
what forms the lateral sacral crest
the fused transverse processes and transverse tubercles from S1-S5
What is the sacral tuberosity
the enlarged transverse tubercle of S2
what is the name of the joint formed by the sacral tuberoisty
the accessory sacro-illiac joint
what muscle is sadi to attach to the dorsal surface of sacrum
iliacus
What feature is observed on the lateral surface of S1-S3
auricular surface
what classification of joint is formed by the auricular surface of sacrum
synovial plane (diarthrosis arthrodia)
What feature does the anterior surface of the superior epiphyseal rim of S1 form
the sacral promontory
What ligament is attached to the sacral hiatus
the superficial posterior sacrococcygeal ligament
how many synovial joint surfaces are typically present at sacral cornu
4
what joint classifications are typically present at sacrum
fibrous (amphiarthrosis) syndesmosis
cartilaginous (amphiarthrosis) symphysis
synovial plane (diarthrosis arthrodia)
what forms the posterior boundary for the fifth sacral spinal nerve intervertebral foramen
sacral cornu, coccygeal cornu, superficial posterior sacrococcygeal ligament, and intercornual ligament
what fors the anterior boundary for the fifth sacral spinal nerve intervertebral foramen
vertebral body S5, vertebral body Co1, deep posterior sacrococcygeal ligament and intervertebral disc
what is the homolog for the posterior longitudinal ligament at S5
deep posterior coccygeal ligament
What is the homolog for the anterior longitudinal ligament at S5
anterior sacrococcygeal ligament
What is the homolog for the ligamentum flavum at S5
superficial posterior sacrococcygeal ligament
What forms the inferior boundary for the spinal canal
the union of the superficial posterior and deep posterior sacrococcygeal ligaments
What ligament is formed by the union of the superficial posterior sacrococcygeal and the deep posterior sacrococcygeal ligaments at Co1
the posterior sacrococcygeal ligament
what ligament is a homolog of the intertransverse ligament at S5
lateral sacrococcygeal ligament
What ligament divides the sciatic foramen into the greater and lesser sciatic foramen
sacrospinous ligament
which ligament has a broad attachment along the lateral margin of sacrum and coccyx and then attaches to the ischial tuberosity
sacro tuberous ligament
Which ligament represents a thickening of the fibrous capsule of the sacro iliac joint
anterior sacro iliac ligament
which ligament is the strongest of the sacro illiac ligament and is penetrated by dorsal rami of the sacral spinal nerves
interosseous sacro-iliac ligament
which ligament will attach the intermediate sacral crest of S1, lateral sacral crest of S2 to the posterior superior iliac spine
short posterior sacro-iliac ligament
which ligament attaches the lateral sacral crest of S3 and S4 to the posterior superior iliac spine
long posterior sacro-iliac ligament
what is the homolog for the capsular ligament at S5
intercornual ligament
