Exam 2 Flashcards
(207 cards)
Pars interarticularis
Narrow portion of vertebral arch between superior and inferior articular processes.
More susceptible to trauma.
Spondylolysis
Damage to pars interarticularis
Spondylolisthesis
Can be caused by spondylolysis
Slippage of vertebral body with respect to adjacent vertebral body graded I-V
Atlas
C1
Lacks vertebral body
Directly articulates with occipital bone and allows for flexion and extension of head at atlantoocippital joint (nodding)
Axis
C2
Anterior arch has upward projection (odontoid processs) that articulates with anterior of arch of C1 allowing for rotatoin of head at atlantoaxial joint (shaking head no)
Sacrum
Five fused sacral vertebrae
Anterior and posterior sacral foramina allow rami to exit sacral canal.
Two largge articular srufaces to articulate with pelvic bones
Coccyx
Attaches to apex of sacrum
Fused 4 coccygeal vertebrae
Site of attachment for muscles and ligaments of pelvis
Lordotic curve
Concave posteriorly
Cervical and lumbar
Kyphotic curve
Concave anteriorly
Thoracic and Sacrum
Scoliosis
Spine is curved laterally
Zygapophyseal joints
Synovial joints between facests on superior and inferior articular facets
Annulus fibrosus
Fibrous outer layer of intervertebral disc
Nucleus pulposus
Softer center of intervertebral disc
Where do spinal nerves exit vertebral canal
Intervertebral foramina
How many spinal nerve pairs are there
31
How many vertebrae are there
33
most common location for intervertebral disc herniation
Lumbar
What direction does a intravertebral disc herniation usually go in
Posterolateral bc anterior longitudinal is bigger and annular fibrosis is thinner posteriorly
Stages of intraventricular disc herniation
- Bulge - annular fibrosis still intact but nucleus pulposus is getting larger.
- Protrusion - annular tear and nucleus pulposus forced to outer layers.
- Extrusion - Annulus fibrosis ruptures and nucleus pulposus leaks out.
- Sequestration - Part of disc becomes separated and disc fragments migrate into spinal cord
What nerve would be compressed by herniation of C6/C7 intervertebral disc
C7
What nerve would be compressed by herniation of L3/L4 intervertebral disc
L4
Radiculopathy
Symptoms caused by compression of spinal nerve, nerve root, or DRG
Trapezius
O: superior nuchal lnie, external occipital protuberance, nuchal ligament, spinous processes C7-T12
I: Lateral 1/3 of clavicle, acromion, spine of scapula
N: Accessory nerve (CN XI)
Blood: superior transverse cervical a.
Action: superior fibers elevate scapula, middle fibers retract/adduct scupula, low fibers depress scapula
Latissimus Dorsi
O: Spinous processes of T7-L5, sacrum, iliac crest, thoracolumbar fascia
I: Floor of intertubercular sulcus of humerous
N: Thoracodorsal nerve
Blood supply: thoracodorsal artery
Action: Extend, medilally (interally) rotate and adduct glenohumeral joint