The present study obtained saccadic eye movements from 25 right-handed normal subjects (aged 18-35 yr, mean 22.4 yr) to examine the effects of saccade direction on saccadic parameters (latency, duration and average velocity). Binocular saccadic eye movements were recorded with a direct-current electrooculographic system, and analysis was performed on a laboratory digital computer. The LED target positions were randomly selected 10, 15, 20, 25 and 30 degrees to the left or right of the fixation points. In general, the mean values of the saccadic parameters over large saccade angles were in agreement with those previously reported. There were no significant differences between saccades directed to the right and to the left.
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http://dx.doi.org/10.1515/jbcpp.1999.10.1.73 | DOI Listing |
eNeuro
January 2025
Research Group for Brain and Cognitive Science, Shahid Beheshti Medical University, Tehran, Iran.
Visual information emerging from the extrafoveal locations is important for visual search, saccadic eye movement control, and spatial attention allocation. Our everyday sensory experience with visual object categories varies across different parts of the visual field which may result in location-contingent variations in visual object recognition. We used a body, animal body, and chair two-forced choice object category recognition task to investigate this possibility.
View Article and Find Full Text PDFBackground: Phenotyping Alzheimer's Disease (AD) can be crucial to providing personalized treatment. Several studies have analyzed the use of digital biomarkers to characterize a subject's behavior, usually obtained from a single modality, such as speech. However, combining several modalities in a single study has not been deeply studied.
View Article and Find Full Text PDFBackground: Canada and the United States are both aging and becoming increasingly diverse. Despite this demographic shift, non-White racial/ethnic groups remain underrepresented in research on cognitive impairment and dementia. A major barrier to inclusivity is the lack of cognitive assessments that are valid in individuals with diverse language and cultural backgrounds.
View Article and Find Full Text PDFBackground: Clinical rating scales and neuropsychological tests are commonly used for assessing sign and disease severity, yet lack detail in the early stages Alzheimer's Disease (AD). Existing evaluation methods can be subjective, nonlinear, expensive, or reliant on anecdotal evidence making objective and consistent characterization and phenotyping of AD difficult. Multimodal analysis of patient behavior, rather than scoring of patient-generated output which can be skewed by compensation strategies, presents a unique opportunity to objectively quantify AD related changes.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Johns Hopkins University, Baltimore, MD, USA.
Background: Phenotyping Alzheimer's Disease (AD) can be crucial to providing personalized treatment. Several studies have analyzed the use of digital biomarkers to characterize a subject's behavior, usually obtained from a single modality, such as speech. However, combining several modalities in a single study has not been deeply studied.
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