Exam 2- Sacrum Flashcards
How many fibrous syndesmosis joint surfaces are present on the S1 vertebral body
Four
How many joint surfaces are present on the vertebral body of the first sacral segment
5
What muscle attaches to the first sacral vertebral body
Psoas major
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; concave
What is the name given to the projection on the first sacral superior articular facet
Mammillary process
From the anterior view, the intervertebral discs of the sacrum will be replaced by what feature
Transverse ridges
An imaginary line drawn along the dorsal midline of the sacrum is identified as the
Median sacral crest
What forms the median sacral crest
Fused spinous processes and their spinous tubercles
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 crest
The mammillary process of S1 and the sacral cornu of S5
What is the remenant of the inferior articular process and facet of S5
The sacral Cornu
What is the name given to 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 is the name of the joint formed by the sacral tuberosity
The accessory sacroiliac joint
What muscle is said to attach to the dorsal surface of the sacrum
Iliacus
What feature is identified on the lateral surface of S1-S3
Articular surface
What classification of joint is formed by the auricular surface of sacrum
Synovial plane
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 sacral coccygeal ligament
How many synovial joints are typically present at sacrum
Four
What joint classifications are typically present at sacrum
Fibrous syndesmosis, carilaginous symphysis and synovial plane
What part of the sacral ala is derived from the costal element
The anterior two-thirds
What is the homolog for the ligamentum flavum
Superficial posterior sacrococcygeal ligament
What forms the inferior boundary for the spinal canal
The Union of the superificial posterior and deep posterior sacrococcygeal ligaments
What ligament is a homolog of the Intertransverse ligament of S5
Lateral sacrococcygeal ligament
What ligament decides the static foramen into the greater and lesser sciatic foramina
Sacrospinous ligament
Which ligament has a broad attachment along the lateral margin of the sacrum and coccyx and then attaches to the ischial tuberosity
Sacrotuberous ligament
Which ligament represents a thickening of the fibrous capsule of the sacro-illiac joint
Anterior sacr-illiac ligament
Which ligament is the strongest sacro-iliac ligament and is penetrated by the dorsal rami of the sacral spinal nerves
Interosseous sacro-iliac ligmament
