Exam 1 Osteology - Vertebrae Flashcards
vertebral functions
support/weight bearing attachments for muscles protection of spinal cord passage of spinal nerves motion shock absorption
vertebral formula
C7, T12, L5, S5, Cy 3-6
primary curves
present at birth
secondary curves
develop after birth
lordotic
curves anterior
kyphotic
curves posterior
basic structures of vertebrae
body, pedicle, lamina, spinous process, transverse process, superior/inferior articular processes, vertebral foramen
neural arch
formed by 2 pedicles, 2 lamina
pars interarticularis
portion between superior and inferior articular processes
intervertebral foramen
formed by superior vertebral notch of one vertebrae and inferior vertebral notch of another
boundaries of IVF
pedicle of superior vertebra vertebral body of superior vertebra vertebral body of inferior vertebra (cervical incl. uncinate process) pedicle of inferior vertebra Z-joint
facet joint
aka zygapophyseal joint (z-joint), synovial joint
formed by superior and inferior articular facets
intervertebral joint
symphysis, amphiarthrotic
intervertebral discs
23 total, C2-C3 down to L5-S1
IVD functions
shock absorption
attach vertebral bodies together
form secondary curves
anterior wall of the IVF
IVD components
nucleus pulposus
annulus fibrosus
characteristics of cervical vertebra
- support/movement of head, most complicated articular system (37 joints)
- most movement than other spinal regions
- smallest of the 24 moveable vertebrae
- curved anterior to aid in shock absorption
- vertebral foramen is large/triangular shaped
- all have transverse foramen
- superior surface of body is concave, inferior is convex
atypical cervical vertebrae
C1, C2, C7
typical cervical vertebrae
C3-C6
Why is C1 atypical?
no spinous process
no vertebral body
Why is C2 atypical?
has dens
Why is C7 atypical?
vertebral prominens
no costotransverse bar
vertebral artery does not pass through transverse foramen (accessory vertebral vein does)
Difference between inferior and superior articular facts on the atlas?
superior is more elongated
inferior is more rounded