Cervical Spine PPT

AO joint

C1/atlas has concave R and L superior facets

skull has convex R and L occipital condyles

AA joint

median joint: odontoid process of C2/anterior facet on dens contacts facet on internal surface of atlas/C1

2 lateral joints: C2 R and L concave superior facets contact C1 R and L slightly convex inferior facets

flexion; extension

the AO joint provides ____ and ___ mainly but also limited rotation and lateral flexion

flex/ext, lateral flexion, and rotation

the AA lateral joints provide what motions?

rotation

the AA median joint provides what motion?

50%

what percent of cervical rotation occurs at C1-C2?

same; opposite

in the AO joint:

- the occipital condyles roll ____ and glide ____ of head movement

pivots

the AA joint ____ for rotation

extension = lateral flexion

what is the capsular pattern for the AO joint?

intervertebral joints

adjacent superior and inferior vertebral bodies and intervertebral discs

zygapophyseal/facet joints

R and L superior and inferior articular facets on adjacent vertebral processes

inferiorly; anteriorly

the inferior facet of superior vertebrae is oriented ____ and ____

motion

the angle of the facets and spinous processes affects the amount of ____

excessive

spinous processes limit ____ motion

flex/ext, lateral flexion, and rotation

C2-C7 combined provide what motions?

equal limitations in all motions except flexion

what is the capsular pattern for motion of C2-C7?

anterior slide and tilt

what are the arthrokinematics for cervical flexion of the superior vertebral body?

slide anteriorly and superiorly

what are the arthrokinematics for cervical flexion of the inferior facets of the superior vertebra?

posterior slide and tilt

what are the arthrokinematics of cervical extension of the superior vertebral body?

slide posteriorly and inferiorly

what are the arthokinematics of cervical extension of the inferior facets of the superior vertebra?

slides posteriorly and inferiorly on side of motion and opposite on other side

what are the arthrokinematics of cervical lateral flexion and rotation of the inferior facets?

greater restriction in lateral flexion to opposite side and rotation to the same side

what is the capsular pattern for unilateral facet involvement?