Cervical spine Flashcards
Name C0-C1
Atlanto-occipital joint
Principle motion of C0-C1
Flexion-extension (nodding of the head)
Which motion are not possible at atlanto-occipital joint?
Rotation and SB
Biomechanics of flexion at C0-C1
anterior roll/backward slide
extension at C0-C1 is limited by
occiput compressing sub occipitals
What happens at the condyles C0-C1 when rotation and SB occurs?
Condyles must slide out/lift out of their socket = tension on atlanto-occipital ligaments and joint capsule
Most mobile articulation
C1-C2
Most weight bearing in cx-spine
Axis - C2
Atlas
C1
Axis
C2
Which structure acts as a pivot point on C2?
Odontoid process (transverse ligament)
Dens (odontoid process) is on ant or post aspect of C2?
anterior
45-50d cervical spine rotation comes from where
C1-C2
Lower cervical spine
C3-C7
coupled mvts (law) - C1-C2
rotation only
coupled mvts (law) - C3-C7
follow R=S mechanics
greatest flexion and extension of facet joints occurs between ____
C5-C6
Symptoms of vertebral artery occlusion
vertigo
nausea
tinnitus
drop attacks
visual disturbances
rarely stroke or death
where does the vertebral artery passes in the Cx-spine
through the TPs
Vertebral artery is affected by which mvt
extension and rotation
80% of blood supply
Internal carotid artery
Internal carotid artery is stressed mainly with which 3 motions
rotation
extension
traction motions
Internal carotid artery passes under which structures
subclavius
SCM
platysma
muscles attached to hyoid b.
25% of height of the cervical spine
intervertebral discs
there is no intervertebral discs where
between C0-C1 and C1-C2
Accessory nerve number
CN XI (6)
Hypoglossal nerve number
CN XII (12)
Nerve roots of phrenic nerve
C3-C4-C5
Phrenic nerve innervate what important structure?
Diaphragm
What muscles does the brachial plexus run between or under?
Scalenes
SCM
Pec minor
WHAT ELSE
Brachial plexus can be compressed by what
Clavicle
First rib