Related Experiment Video
Updated: Aug 10, 2026

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
Published on: May 23, 2013
The halo vest: an evaluation of motion and forces across the neck
Abstract:
Flexion-extension motion and compression-distraction forces across the cervical spine were evaluated in 6 patients in halo vests and in 1 patient in a halo cast. Motion in the vest was evaluated in supine and upright positions and averaged 31% of normal motion at the levels tested. Compression-distraction forces showed great individual variation and frequent compression. The average distraction force varied in different positions by nearly 20 pounds in the vest and over 30 pounds in the cast. Methods of improving cervical spine stability in halo orthoses are discussed.
More Related Videos
Related Concept Videos
The Vestibular System
Articulations of the Vertebral Column
Muscles of the Anterior Neck
Muscles that Move the Head
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
Halo Effect
Vectors in Space: Problem Solving

