Back Flashcards
(43 cards)
Fxns of vertebral column
- Protect spinal cord/nerves
- Posture, locomotion
Movements of vertebral column
- Extension
- Flexion
- Lateral flexion
- Rotation
Primary curvature
Kyphosis
- Concave anteriorly
- Develop early in ontogeny, during fetal period
Secondary curvatures
Lordoses
- Concave posteriorly
- Cervical curvature develops as infant learns to hold head upright
- Lumbar curvature develops as infant learns to sit upright & walk
Excessive thoracic kyphosis colloquial
“Humpback”
Excessive lumbar lordosis colloquial
“Swayback”
Scoliosis
Lateral deviation & rotation
Atlas
- C1
- Lacks body & spinous process, ring-shaped
- Superior articular facets articulate w/ occipital condyles
Axis
- Dens process
- Large superior articular facets articulate w/ inferior articular facets on C1
Thoracic vertebrae
- Heart shaped bodies
- Inferiorly projecting spinous processes
- Costal facets articulate w/ ribs
Lumbar vertebrae
- Robust, large bodies
- Posteriorly projecting spinous processes
- Larger gaps btwn adjacent vertebrae (esp. when flexed)
Intervertebral discs
- Distribute weight/force
- Provide flexibility
- Cervical/lumbar discs are thicker anteriorly
What type of joints are btwn the vertebral bodies?
- Cartilaginous
- Intervertebral discs & ligaments
What type of joints are located at the uncinate processes?
Uncovertebral
What type of joints are btwn the vertebral facets?
Zygapophysial
- Orientation of facets determines range of motion
Orientation of cervical vertebral facets
Face superiorly/inferiorly
Cervical vertebrae actions
- Flexion
- Extension
- Lateral flexion
- Rotation
Orientation of thoracic vertebral facets
Face anteriorly/posteriorly
Thoracic vertebrae action
Rotation
Orientation of lumbar vertebral facets
Face medially/laterally
Lumbar vertebrae actions
- Flexion
- Extension
- Lateral flexion
Atlanto-occipital joints (location & action)
- Synovial joints btwn superior articular facets of C1 & occipital condyles
- Flexion/extension of head (“Yes”)
Atlanto-axial joints (location & action)
- Synovial joints btwn C1 & C2
- 2 lateral (facet), 1 median (btwn anterior arch of C1, dens process, & transverse ligament of C1)
- Rotation of head (“No”)
Inferior angle spinal level
T7