title: Dynamic analysis of head movements by means of a three-dimensional position measurement system.
abstract: By using a newly devised three-dimensional position measurement system, head movements of a normal subject and a patient with congenital strabismus were studied. This system consists of both infrared light-emitting diodes and position-sensitive diodes, which lead to high accuracy and high-frequency response with a position accuracy within 1 mm and angular accuracy within 1 degree. The electro-oculograph was used for measuring ocular movements. The power spectra of head and eye movements showed a similar frequency component and a similar frequency response with respect to the signal inputs of head movements, so there is a close correlation between the two movements.
authors.affiliation: Department of Ophthalmology, Okayama University Medical School, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Ohtsuki
authors.forename: H
authors.initials: H
authors.lastname: Okayama
authors.forename: H
authors.initials: H
authors.lastname: Konishi
authors.forename: Y
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: S
authors.initials: S
authors.lastname: Hasebe
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006257:Head; D006801:Humans; D007259:Infrared Rays; D008297:Male; D009068:Movement; D009885:Ophthalmology / Q000295:instrumentation / Q000379:methods*; D012016:Reference Values; D012438:Saccades; D013285:Strabismus / Q000151:congenital / Q000503:physiopathology*