Chapter 4 spine power point Flashcards
protects spinal cord
vertebral canal
path for nerves
intervertebral foramina
jelly filled
protects and cushions
inside intervertebral disk
nucleus pulposus
hard outer area
annulus fibrosus
have transverse foramen
bifid spinous process
cervical vertebrae
C3-C6(has bifid spinous process)
cervical vertebrae
no spinous process
articulates with occipital bone
C1
Atlas
odontoid process
Dens
allows rotation of head
C2
Axis
has vertebral prominens
C7
have costal facets
looks like a giraffe
thoracic vertebrae
costovertebral joint
articulate with head of rib
costotransverse joint
articulate with tubercle of rib
larger body size
Lumbar vertebrae
5 fused vertebra
foramina
promontory
hiatus
cornu
articulates with illiac
sacrum
4 fused vertebra
attachment point for filum terminlae
coccyx
connects Dens(odontoid process) to foramen magnaum
apical ligament
oblique across Dens to Anterior of C1
rotates head
Alar ligament
sling posterior of Dens(odontoid process)
attach foramen magnum to body of Axis
cross-like appearance
transverse ligament
longitudinal portion of transverse ligament
cruciform ligament
thick bands
base of occipital to cervical spinous processes
attachment point for muscles
ligamentum nuchae
runs complete length of spine on spinous processes
continuation of ligamentum nuchae
supraspinous ligament
broad ligament from clivas of occipital bone to axis
covers Dens
continuous with posterior longitudinal ligament
Tectorial membrane
runs entire anterior surface of all vertebral bodies to sacrum
thick broad ligament
Anterior longitudinal ligament
runs lenght of spin on anterior inner surface of the vertebral foramen
attaches at disk spaces
thin fibrous
posterior longitudinal ligament
connects posterior portion of lamina
ligamentum flava
number of vertebrae
7 cervical
12 thoracic
5 lumbar
5 sacral (fused)
4 coccyx (fused)
runs from transverse process (12th rib) to illiac crest
lateral flexion
considered abdominal muscles
fans out towards side
quadratus lumborum
anterior and lateral to vertebral body in lumbar region
psoas muscle
same as surrounding the brain
Dura
arachnoid
pia
spinal meninges
thecal sac
created by the dura mater
highly vascular
pia mater
lower end of pia mater
attachs to coccyx
filum terminale
keep spinal cord supported laterally in spinal column
denticulate ligaments
end of spinal cord
around L1-L2
conus medullaris
the continuatoin of nerves after the conus medullaris
cauda equina
surrounds the gray matter in spinal column
white matter
central portion of spinal cord
butterfly shape
gray matter
posterior projections
sensory neurons
in gray matter
dorsal horns
anterior projections
in gray matter
shorter
motor neurons
ventral horns
neurons entering cord from the body
dorsal roots
combining of dorsal and ventral nerves
31 pair
spinal nerve
contains motor and sensory fibers
extends posterior after foramen to innervate trunk
dorsal rami
innervates anterior of body
comes off spinal nerve and splits
ventral rami
cervical
brachial
lumbar
sacral
nerve plexuses
at C1-C4
cervical plexus
goes to diaphragm to control respiration
at level of C3-C5
phrenic nerve
at level of C5-T1
roots and cords
motor and sensory for upper extremeties
brachial plexus
emerge between anterior and medial scalene muscle
C5-T1
Brachial plexus roots
5 terminal branches
musculocutaneous
axillary
median
radial
ulnar
brachial plexus cords
T12-L4
anterior of pelvis and leg
lumbar plexus
largest branch of lumbar plexus
femoral nerve
largest branch of femoral nerve
descends medial aspect of leg to ankle with vein
saphenous nerve
motor and sensory for posterior
buttocks and legs
contains sciatic nerve
sacral plexus
largest nerve from sacral plexus
sciatic nerve
tibeal nerve
peroneal nerve
branches of sciatic nerve
anterior spinal artery
posterior spinal artery
spinal branches
spinal arteries
single artery runs length of spine
anterior spinal artery
two arteries that run length of spine
posterior spinal arteries
branch between anterior and posterior arteries
spinal branches
valve less
anterior and posterior
radial branches
spinal veins
run intervertebral
veins of the vertebral column