lecture 4 spine-the vertebral column Flashcards
what portion of a vertibrae is the weight bearing part? what modifications does it have?
the body, it had trabecular bone that is organized in columns,
how is weight transfered from the point of muscular attachement to the body of a vertebra?
via the laminae, to the pedicles.
projections from the “arch” include spinous processes and transverse processes. they do three things:
attachments for muscles, levers for action, sites of articulation with other vertebrae
what are the sites of articulation?
facets (zygapophysial)
what is the “pars interarticularis?”
region that often fractures, where two segments articulate
what is the orientation of lumbar facets?, what does this do
superior: medial, inferior: lateral– allows for flexion and extension
what are some other features of lumbar vertebra?
kidney shaped body, midsized, triangular foramen, large (weight) no rib articulations, short spinous processes,
the typical thoracic vertebra:
has a heart shaped body, long spinous process, facets are angled AP, rib articulations
the typical cerevical vertebra:
large trianglular foramen, small oval body, transverse foramen, c3-c5 have short split transverse process.
on C1 (atlas) how do you tell anterior?
articular facets orientied towards a, anterior tubericle is smaller than post,
features of C2?
axis, dens, bifid spinous process, no transverse foramen
where does the subarachnoid space end?
s2
what is the role of the spinal chord?
motion, support, protection, stablization
what is the denticulate ligament?
piamater, attaches the spinal cord between rootlets, maintains it in the subarachnoid space
a source of “back pain” is
the recurrent meningeal nerves (innervate that annulus etc)
