Binocular counterrolling in humans during dynamic rotation.

Seven subjects 18 to 66 years old underwent 360 degrees rotation at a constant velocity of 3 degrees/sec, in 27 trials beginning randomly right ear down or left ear down. A camera on the rotating chair photographed both eyes every 10 degrees. Dual projectors measured counterrolling, the image from one projector being aligned and rotated until it was superimposed on the image from the other. Right and left eyes were measured independently. The group reached maximum counterrolling at about 70 degrees and 270 degrees in rotations to the right, with values of about -6 degrees and 4 degrees respectively. Rotations to the left reached maximum at 50 degrees and 270 degrees with about 4.5 degrees and -5.25 degrees respectively. Individual subjects showed ranges of counterrolling varying from 4.03 degrees to 17.44 degrees, mean 11.30 degrees. More counterrolling was observed when subjects were tilted to right than to left. The downward eye counterrolled more than the upward. Amount of counterrolling was inversely correlated with age.

[1]  R. S. Kellogg,et al.  Otolith organ activity within earth standard, one-half standard and zero gravity environments. , 1965, Aerospace medicine.

[2]  U. Rosenhall,et al.  Vestibular sensory epithelia. , 1974, Archives of otolaryngology.

[3]  J. R. Nelson,et al.  The otoliths and the ocular countertorsion reflex. , 1971, Archives of otolaryngology.

[4]  E. F. Miller,et al.  Counterrolling of the human eyes produced by head tilt with respect to gravity. , 1962, Acta oto-laryngologica.

[5]  W G WALTON,et al.  Compensatory cyclo-torsion accompanying head tilt. , 1948, American journal of optometry and archives of American Academy of Optometry.

[6]  B. Bergström.  Morphology of the vestibular nerve. II. The number of myelinated vestibular nerve fibers in man at various ages. , 1973, Acta oto-laryngologica.

[7]  S. Kompanejetz.  Investigation on the Counterrolling of the Eyes in Optimum Head-Positions , 1928 .

[8]  T W Norris,et al.  Age-related changes in caloric nystagmus. , 1971, Acta oto-laryngologica. Supplementum.

[9]  E Fluur,et al.  A comparison between subjective and objective recording of ocular counter-rolling as a result of tilting. , 1975, Acta oto-laryngologica.

[10]  B. Bergström.  Morphology of the vestibular nerve. 3. Analysis of the calibers of the myelinated vestibular nerve fibers in man at various ages. , 1973, Acta oto-laryngologica.

[11]  U Rosenhall,et al.  Degenerative changes in the human vestibular sensory epithelia. , 1975, Acta oto-laryngologica.

[12]  Ashton Graybiel,et al.  LXIII A Comparison of Ocular Counter-Rolling Movements between Normal Persons and Deaf Subjects with Bilateral Labyrinthine Defects , 1963, The Annals of otology, rhinology, and laryngology.

[13]  S J Herman,et al.  Cycloduction of the eyes with head tilt. , 1971, Archives of ophthalmology.

[14]  L. Johnsson,et al.  Degenerative changes and anomalies of the vestibular system in man , 1971, The Laryngoscope.

[15]  I. Howard,et al.  THE MEASUREMENT OF EYE TORSION. , 1963, Vision research.

[16]  C. Markham,et al.  Ocular accomodative changes in humans induced by positional changes with respect to gravity. , 1977, Electroencephalography and clinical neurophysiology.