Yukihisa Suzuki

Learn More
PURPOSE We evaluated optic radiation (OR) damage in patients with glaucoma by using fractional anisotropy (FA) of diffusion-tensor magnetic resonance imaging. METHODS We studied 29 patients with glaucoma and 19 healthy controls. Regions of interest were placed over the bilateral anterior and posterior ORs on the FA maps, and the FA value of each region(More)
To localize regional alterations in cerebral glucose metabolism in essential blepharospasm (EB) patients with photophobia. We have studied 22 EB patients by performing positron emission tomography and [(18)F]-fluorodeoxyglucose analysis. The patients were classified into two subgroups, namely, EB with photophobia (P group) and EB without photophobia (NP(More)
Essential blepharospasm (EB) is classified as a form of focal dystonia characterized by involuntary spasms of the musculature of the upper face. The basic neurological process causing EB is not known. The purpose of this study was to investigate cerebral glucose metabolism in patients with EB whose symptoms were suppressed by an injection of botulinum-A(More)
In this study, we investigated gray matter density in essential blepharospasm (EB) patients, focusing on the duration of disease and severity of symptoms. We studied 32 patients (10 males and 22 females; age, 55.0 ± 6.5years) with EB and 48 controls (15 males and 33 females; age, 54.4 ± 10.3years) by using 3D T1-weighted magnetic resonance imaging and(More)
PURPOSE Positron emission tomography (PET), the blood flow response in the primary visual cortex (V1) to two visual stimuli, low temporal frequency (6 Hz) to activate the parvocellular system, and high temporal frequency (25 Hz) to activate the magnocellular system were used to investigate pathophysiologic mechanism of amblyopia. METHODS Five women and(More)
BACKGROUND To demonstrate the efficacy of positron emission tomography (PET) for examining multiple sclerosis (MS) patients with hemianopia. CASE A 20-year-old man visited us with a complaint of left homonymous hemianopia and headache. OBSERVATIONS The patient's visual acuity was 1.2 (n.c.) OD and 0.9 (1.0) OS. Magnetic resonance imaging (MRI) showed a(More)
A 43-year-old woman with drug-related blepharospasm was followed up for 22 months. She had undergone etizolam treatment for 19 years for indefinite complaints. We examined her cerebral glucose metabolism 5 times (between days 149 and 688 since presentation), using positron emission tomography, and identified regions of interest in the thalamus, caudate(More)
PURPOSE Although activation of the lateral geniculate nucleus (LGN) has been shown by functional magnetic resonance imaging, a quantitative evaluation of the activity has not been reported by positron emission tomography (PET). The purpose of this study was to quantify the degree of activation of the LGN and other vision-related structures by visual stimuli(More)
PURPOSE To correlate the neuro-ophthalmological observations with the magnetic resonance images (MRI) and positron emission tomographic (PET) findings in a case with left homonymous hemianopia and left hemispatial neglect. CASE A 57-year-old woman underwent surgery for a ruptured anterior communicating artery aneurysm. After she recovered consciousness,(More)