Sacrum Flashcards
What part of the sacral ala is derived from the costal elements
The anterior two-thirds
What part of the sacral ala is derived from the true transverse process
The posterior third
How many fibrous 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
How many cartilaginous amphiarthrosis symphysis joint surfaces are present on the S1 vertebral body
1
How many fibrous amphiarthrosis syndesmosis joint surfaces are present on the S1 vertebral body
4
What muscles may attach 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
Backward upward medial (BUM)
Typically concave
What is the name given to the projection on the first sacral superior articular process
Mammillary process
What muscles will attach to the sacral mammillary process
Multifidis
What is the usual condition for the first sacral spinous process
it is non-bifid and short
An imaginary line drawn along the dorsal midline of sacrum is identified as the
Median sacral crest
What is the name given to the congenital conditrion in which the fifth lumbar spinous process is elongated, the sacrum exhibits spina bifida, and dorsiflexion produces pain
Knife clasp syndrome
An imaginary line drawn from the superior articular process of S1 to the sacral cornu will form what feature
intermediate sacral crest
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
An imaginary line drawn from the transverse process of S1 to the inferior lateral sacral angle
The lateral sacral crest
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 sacro-iliac joint
What feature is identified on the lateral surface of S1-S3
Auricular suface
What feature does the anterior surface of the superior epiphyseal rim of S1 form
the sacral promontory
The continuation of the posterior longitudinal ligament below S3 from what ligament
The deep posterior sacrococcygeal ligament
What forms the posterior boundary for the fifth sacral spinal nerve intervertebral foramen
Sacral cornu
coccygeal cornu
superficial posterior sacrococcygeal ligament
intercornual ligament
What forms the anterior boundary for the fifth sacral spinal nerve intervertebral foramen
Vertebral body S5
Vertebral body Co1
Deep posterior sacrococcygeal ligament
intervertebral disc
What forms the inferior boundary for the spinal canal
The union of the superficial and deep posterior sacrrococcygeal ligaments
What ligament divides the sciatic foramen into the greater and lesser sciatic foramina
Sacrospinous ligament
Which ligament has a broad attachment along the lateral margin of sacrum and coccyx and then attach to the ischial tuberosity
Sacrotuberous ligmaent
Which ligament has a broad attachment along the lateral margin of sacrum and coccyx and then attach to the ischial tuberosity
Sacrotuberous ligament
Which ligament is the strongest of the sacro-iliac ligaments and is penetrated by dorsal rami of the sacral spinal nerves
Interosseous sacro-iliac ligament
What is the homolog for the capsular ligament at S5
Intercornual ligament
