Lecture 16: Kinesiology of the Spine Flashcards
What are the 4 main regions of the spine?
cervical
thoracic
lumbar
sacroiliac and symphesis pubis
What part of the intervertebral disc is innervated and perfused?
The outer third
What is an intervertebral disc composed of?
nucleus pulposus
peripheral annulus
What type of joints are facet joints of the spine and ribs?
non-axial plane synovial
Intervertebral discs are what type of joint?
amphiarthroidial sympheses
What does the anterior longitudinal ligament (ALL) limit?
limits extension and reinforces anterior annulus fibrosis and facet joints
Where does the ALL begin and end?
orginates as the anterior atlanto-occipital (C0-1) membrane and extends to the sacrum
What does the posterior longitudinal ligament (PLL) limit?
limits flexion and reinforces poserior annulus fibrosus
Which is thinner and weaker, the ALL or PLL?
the PLL
Where does the PLL begin and end?
originates at the tectoral membrane (C0-2) and extends to sacrum
Intervertebral discs are between which vertebrae?
from C2-C3 to L5-S1
What does the ligamentum flavum limit?
Flexion, especially in the lumbar region
What does the ligamentum flavum limit?
Flexion, especially in the lumbar region
What do the interspinous ligaments limit?
The primary limiter of flexion
What does the supraspinous ligament limit?
flexion
What is the first ligament to be injured in a hyperflexion injury?
the supraspinous ligament
What does the intertransverse ligament limit?
lateral flexion
Lateral flexion creates what forces
Compression ipsiliaterally and tensile force contralaterally
Where does torsional stiffness increase?
mid thoracic spine inferiorly
Flexion of the spine is primarily limited by ligaments. Which ligaments?
interspinous ligaments
supraspinous ligaments
ligamentum nuchae
PLL
Extension narrows the IVFs and is limited by what?
Bony contact
ALL
Lateral flexion is maximized with facets in what plane?
Frontal plane