Cervical Ax Flashcards
What are the principal motions of the atlanto-occipital joint (C0-C1)?
flexion, extension (15-20 degree)
rotation and SB are not physiological motions of the joint
What are the C0-C1 mechanics?
Flexion: anterior roll, backward glide
Extension: posterior roll, anterior glide
Flexion limited by: posterior structures, submandibular tissues
Extension limited by: occiput compressing sub occipitals
What are the characteristics of C1-C2?
Atlas-Axis, most mobile articulation, axis most weight bearing of C/S
Biconvex joint: rotation is 50degrees
Flex/ext: 10 degrees (no lig restriction)
Odontoid process (dens) of C2 acts as a pivot point (transverse ligament holds it in place)
What can pathology in the lower cervical spine lead to?
Lower C/S= C3-C7
pathology in the region can lead to a combo of neck and arm pain
Which fryette’s law does the lower cervical spine follow?
Law 2, rotation= side bend
Where does the greatest cervical flexion extension of facet joints occur?
between C5-C6 (most common area for disc herniation in C/S
What can affect the vertebral artery and its blood supply?
part of vertebrobasilar system, passes through TPs starting at C6
Affected by extension, rotation, osteophyte formation, facet joint injury
What are S/S of an affected vertebral artery?
vertigo, nausea, tinnitus, drop attacks, visual disturbances, rarely stroke or death
What stresses the internal carotid artery?
80% of blood supply to the brain
Stressed mainly with rotation, extension and traction motions
muscle tightness: subclavius, SCM, platysma, any muscle attached to hyoid
How much of the cervical height do the intervertebral discs make up?
25%
No disc b/n C0-C1 and C1-C2
How many nerve roots are there in the C/S?
8 nerve roots
nerve root is named for cervical vertebrae below it
What is the cervical plexus?
C1-C5
common cranial nerves: accessory nerve, hypoglossal nerve
Phrenic nerve (C3-C4-C5) keeps diaphragm alive
What are the 12 cranial nerves?
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory
Hypoglossal
What is the brachial plexus?
C5-T1 nerve roots
Runs between scalenes, pec minor, first rib, clavicle
Numbness/tingling/burning common s/s of brachial plexus compression
disc degeneration, TOS, cervical stenosis, upper cross syndrome might affect the brachial plexus
What structures make up the anterior and posterior triangles of the neck?
Anterior: Mandible, SCM, Sternum
Posterior: SCM, clavicle, trapezius
What is the anterior cervical fascia called?
the platysma