Apparatus for measuring head and spine movement

Claim 1

Apparatus for measuring rotative body movement about a substantially vertical axis comprising, in combination, a headband adapted to be securely attached to the head comprising a band adapted to encircle the lateral portions of the patient's head and adjustable means defined on said band for varying the circumference thereof, a crown bridge mounted upon said headband for extending over the crown of the head, an indicia scale fixedly mounted upon said crown bridge adapted to lie in a substantially horizontal plane having a centrally located pivot shaft defining a pivot axis, said scale lying in a plane perpendicular to said pivot axis, a body reference indicator pivotally mounted upon said crown bridge at said pivot shaft for rotation about a substantially vertical axis disposed adjacent said scale, said body reference indicator comprising an elongated member having a first portion pivotally mounted upon said crown bridge at said pivot shaft and disposed adjacent said indicia scale and a second portion hinged to said first portion by a hinge axis substantially perpendicular to the length of said first portion whereby said second portion may pivot downwardly toward the wearer's body for positioning relative thereto whereby upon said body reference indicator being maintained at a predetermined location relative to the patient's body rotation of the patient's head about a substantially vertical axis will rotate said scale with respect to said indicator permitting determination of the extent of the patient's head movement, and a gravity operated gauge mountable upon said pivot shaft indicating the inclination of said pivot shaft to the vertical.