Spine Kinesiology Flashcards
Rib articulations
Costovertebral (radiate ligament),
Costotransverse (costotransverse ligament)
Costosternal ( 2 articulations: costochondral as well as chondrosternal, calcify as we age; ribs 8,9,10 share cartilage)
Limitations of Thoracic Motion
Ribs, larger vertebral bodies, spinous processes, ligamentous network,, orientation of zygapophyseal joints
Most Flex/Ext in thoracic spine found in….
Lower thoracic spine, T9-T12
Most rotation in thoracic spine
upper thoracic T1-T8
Most lateral flexion in thoracic spine
throughout but moreso in upper, linked with rotation (ex: if you laterally flex to R, vertebra rotate to L to make room for spinous processes)
Lumbar Kinematics
Flexion/Ext predominate
motion at L4-S1
mostly flex/ext
motion in upper lumbar L1-L3
rotation
lateral flexion in lumbar…
limited, but linked to rotation ie upper lumbar
Sacral Angle
S1, angle formed by line that goes across S1 and another that is parallel to floor, usually 30’, if larger, more likely to have spondylolysthesis
Effect that pelvic tilting (ant/post) has on sacral angle
Anterior tilt=increase angle, posterior tilt= decrease angle
Ilium articulates with
S1, S2, S3 (S4 down is synarthrodial), creating the Sacroiliac joint
nutation/ counternutation
nutation= sacral flexion (S1 forward, S5 back), counternutation= sacral extension (S1 backwards, S5 forward)`
Ligaments of SI Joint
Ant & Post SI joints, Sacrospinous (sacrum to posterior iliac spine), sacrotuberous (sacrum to ischial tuberosity), iliolumbar (lumbar to ilium)
Which ligament creates the greater sciatic foramen and what passes through it?
sacrospinous ligament, the piriformis and sciatic nerve pass through the greater sciatic foramen
Which ligament creates the lesser sciatic foramen?
sacrospinous superiorly and sacrotuberous inferiorly
Anterior Longitudinal Ligament (ALL)
runs along the anterior portion of the vertebral body from C2-sacrum, prevents hyperextension of spine (shortens with flexion, lengthens with extension)
Posterior Longitudinal Ligament (PLL)
runs along the posterior portion of vertebral bodies with the lamina, prevents hyperflexion (shortens with extension, lengthens with flexion), not as extensive as ALL which is why posterior disc herniations are more common than ant