Spine Arthrokinematics

Question 1

A-O Joint Flexion & Ext

Answer 1

Flexion: convex occipital condyle rolls ant, slides post
Extension: convex occipital condyle rolls post, slides ant

Question 2

A-O Joint Rotation & Lateral Flexion

Answer 2

Rotation: not much movement
Lateral flexion: ipsilateral roll, contralateral slide

Question 3

A-A Joint Flexion & Ext

Answer 3

tilts forward and backwards

Question 4

A-A Joint Rotation & Lateral Flexion

Answer 4

Rotation: atlas slides around dens
Lateral flexion: not much movement

Question 5

C2-7 Flexion & Extension

Answer 5

Flexion: slide superior and anterior
Extension: slide inferior and posterior

Question 6

C2-7 Rotation

Answer 6

Rotation: the inferior facets slide posterior and slightly inferiorly on the same side of rotation and anterior and slightly superiorly on the side opposite the rotation.

In other words: ipsilateral facet slides inf/post, contralateral slides sup/ant

Question 7

Protraction
Retraction

Answer 7

Protraction: flexion of lower cervical, extension of upper cervical
Retraction: extension of lower cervical, flexion of upper cervical

Question 8

Thoracic facets during: flexion, extension, rotation, and lateral flexion

Answer 8

flexion: inf facet of top slides sup/ant
extension: inf facet of top slides inf/post

rotation: inf facet of top slides contralateral to rotation

lateral flexion: ipsilateral facet slide inferior; contralateral facet slides superior

Question 9

lumbar facet arthrokinematics for the following motions: flexion, extension, rotation, lateral flexion

Answer 9

flexion: inf facet of top slides sup/ant
extension: inf facet of top slides inf/post

rotation: ipsilateral facets separate contralateral facets get closer

lateral flexion: ipislateral facet slides down; contralateral slides up