Quantitative analysis of ocular movements in Parkinson's disease.
- T. Nakamura, R. Kanayama, Y. Koike
- Medicine, PsychologyActa oto-laryngologica. Supplementum
- 1991
The results suggest the possibility of dopaminergic control on these ocular movements in patients with idiopathic Parkinson's disease.
The perception of head and neck angular displacement in normal and labyrinthine-defective subjects. A quantitative study using a 'remembered saccade' technique.
- T. Nakamura, A. Bronstein
- Medicine, BiologyBrain : a journal of neurology
- 1 October 1995
The lack of detectable changes in cervical tasks in labyrinthine-defective patients does not support the view that the potentiation of the cervico-ocular reflex observed in these patients is due to enhanced sensitivity of the neck afferent system.
Vestibular, cervical and visual remembered saccades in Parkinson's disease.
- T. Nakamura, A. Bronstein, C. Lueck, C. Marsden, P. Rudge
- Psychology, MedicineBrain : a journal of neurology
- 1 December 1994
It is concluded that vestibular and cervical perception of head/neck rotation is normal in Parkinson's disease and abnormalities of 'remembered' saccades are not confined to the visual modality but involve other sensory modalities as well.
Effect of aging on smooth pursuit eye movement.
- R. Kanayama, T. Nakamura, Y. Koike
- MedicineActa oto-laryngologica. Supplementum
- 1994
The effect of aging on smooth pursuit eye movement was clarified and it was found that pursuit gain decreased with increasing target frequency and velocity in all age groups.
Sensing and controlling rotational orientation in normal subjects and patients with loss of labyrinthine function.
- G. Brookes, M. Gresty, T. Nakamura, T. Metcalfe
- MedicineAmerican Journal of Otology
- 1 July 1993
The disability resulting from uni-or bilateral loss of vestibular function was assessed by exposing subjects, in darkness, to random rotational displacements on a motorized chair away from a "center"…
Primary position upbeat nystagmus. Localizing value.
- I. Kato, T. Nakamura, J. Watanabe, K. Harada, M. Aoyagi, T. Katagiri
- MedicineArchives of Neurology
- 1 August 1985
A 39-year-old woman admitted seven days after a sudden onset of dysarthria and vertical oscillopsia with primary position upbeat nystagmus with a discrete vascular lesion that involved the hypoglossal nucleus and and adjacent structures is reported.
Mapping of brainstem lesions by the combined use of tests of visually-induced eye movements.
- I. Kato, J. Watanabe, T. Nakamura, K. Harada, T. Hasegawa, R. Kanayama
- Psychology, MedicineBrain : a journal of neurology
- 1 August 1990
To determine the diagnostic value of visually-induced eye movements for indicating the lateralization of the lesion, optokinetic nystagmus (OKN), fixation-suppression of caloric nystagmus and pursuit…
Computer analysis of optokinetic nystagmus for clinical usefulness.
- T. Nakamura, I. Kato, R. Kanayama, Y. Koike
- Medicine, PsychologyAuris, nasus, larynx
- 1986
Perception of neck rotation assessed by 'remembered saccades'.
- T. Nakamura, A. Bronstein
- Medicine, BiologyNeuroReport
- 1 March 1993
It is concluded that normal man has accurate perception of trunk rotation and that neck-spinal afferents carry a tonic signal with efficient access to the ocular motor system.
The fast-phase velocity of optokinetic nystagmus in central nervous system disorders.
- R. Kanayama, I. Kato, T. Nakamura, Y. Koike
- Biology, PsychologyActa Oto-Laryngologica
- 1 November 1987
The quantitative evaluation of velocity(p) may provide some important information on the mapping of lesions in patients with CNS disorders on the basis of peak velocity of the fast phases of OKN.
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