AI Article Synopsis
- Recent research indicates that scaling relations found in eye-movement fluctuations may signal coordination between cognitive and neurophysiological processes, but their specific implications remain unclear.
- Participants in a study performed an eye-movement task where predictability of cue timing and direction was manipulated, revealing that lower predictability led to higher scaling exponents in their eye movements.
- The findings suggest that changes in scaling exponents are linked to the effort perceived by participants, implying that these exponents reflect the level of voluntary control required during the task.
Article Abstract
Recent research has provided evidence for scaling-relations in eye-movement fluctuations, but not much is known about what these scaling relations imply about cognition or eye-movement control. Generally, scaling relations in behavioral and neurophysiological data have been interpreted as an indicator for the coordination of neurophysiological and cognitive processes. In this study, we investigated the effect of predictability in timing and gaze-direction on eye-movement fluctuations. Participants performed a simple eye-movement task, in which a visual cue prompted their gaze to different locations on a spatial layout, and the predictability about temporal and directional aspects of the cue were manipulated. The results showed that scaling exponents in eye-movements decreased with predictability and were related to the participants' perceived effort during the task. In relation to past research, these findings suggest that scaling exponents reflect a relative demand for voluntary control during task performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3758/s13414-015-0983-5 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Scalp high-frequency oscillation spatial distribution is consistent over consecutive nights, while rates vary with antiseizure medication changes.
Epilepsia
December 2024
Department of Neuropediatrics, University Children's Hospital Zurich, Zurich, Switzerland.
Objective: This study aimed to investigate two key aspects of scalp high-frequency oscillations (HFOs) in pediatric focal lesional epilepsy: (1) the stability of scalp HFO spatial distribution across consecutive nights, and (2) the variation in scalp HFO rates in response to changes in antiseizure medication (ASM).
Methods: We analyzed 81 whole-night scalp electroencephalography (EEG) recordings from 20 children with focal lesional epilepsy. We used a previously validated automated HFO detector to assess scalp HFO rates (80-250 Hz) during non-rapid eye movement (NREM) sleep.
Reflexive eye saccadic parameters in Parkinson's disease.
Front Med Technol
November 2024
School of Engineering, RMIT University, Melbourne, VIC, Australia.
Introduction: Abnormal reactive saccade, with reduced saccadic gain, impaired smooth pursuit, and unwarranted reactions are clinically used to assess people with Parkinson's disease (PwPD). However, there are inconsistent findings related to other saccade parameters such as latency and transition times. This study aimed to identify differences in the reflexive saccade parameters of early stage PwPD and aged-matched control (AMC).
View Article and Find Full Text PDFWhite matter hyperintensities and cholinergic degeneration as Lewy body disease.
Ann Clin Transl Neurol
December 2024
Department of Neurology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
Objective: Although basal forebrain (BF) cholinergic degeneration and white matter hyperintensities (WMHs) are important in neurodegeneration in Alzheimer's disease (AD) and dementia with Lewy bodies (DLB), their relationships with dopaminergic degeneration and clinical manifestations remain unclear.
Methods: A total of 407 patients with cognitive impairment meeting the diagnostic criteria for AD, DLB, or both (AD+DLB) were assessed. All participants underwent 3T MRI, dopamine transporter (DAT) positron emission tomography, neuropsychological tests, and assessments for parkinsonism, cognitive fluctuation, visual hallucination, and rapid eye movement sleep behavior disorder (RBD).
Delirium-onset prodromal Lewy body disease: A series of 5 cases.
Clin Park Relat Disord
November 2024
Department of Psychiatry, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Article Synopsis
- Delirium-onset prodromal Lewy body disease (LBD) is emerging as a key early stage of LBD, but its specific clinical features and biomarkers are not yet fully understood.
- Five cases were studied using neuroimaging techniques, revealing that patients exhibited common symptoms like sleep issues and minor hallucinations before delirium occurred.
- The study suggests that delirium could indicate more advanced stages of prodromal LBD, triggered by various factors, and that cognitive symptoms may improve with treatment like donepezil.
The effects of a dual task on gaze behavior examined during a simulated flight in low-time pilots.
Front Psychol
November 2024
Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada.
Cognitive load can impair an operator's ability to optimally scan and process relevant information that is critical to the safe and successful operation of an aircraft. Since the cognitive demands experienced by pilots fluctuate throughout a given flight due to changes in task demands that range from high to low cognitive load, it has become increasingly important to objectively track and quantify these changes accordingly. The analysis of eye movements has been shown to be a promising method to understand information acquisition, processing efficiency, and how these aspects of cognition impact pilot performance.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!