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# Language processing characteristics in normal pressure hydrocephalus: insights from eye-tracking analysis of
Ji-Yeong Kim1, Jiho Lee2, Nayeon Kim2
1Department of Speech-Language Pathology, Daegu University, Gyeongsan, Republic of Korea.
Frontiers in Aging Neuroscience
|May 8, 2025
Summary
Patients with Normal Pressure Hydrocephalus (NPH) show impaired language processing and altered eye movements during lexical retrieval tasks. These findings highlight the need for targeted language interventions in NPH patients.
Area of Science:
- Neuroscience
- Cognitive Science
- Ophthalmology
Background:
- Normal Pressure Hydrocephalus (NPH) is associated with aging and cerebrospinal fluid circulation issues.
- Ventricular enlargement in NPH compresses brain structures, affecting visual perception, memory, and language processing.
- Language difficulties in NPH patients, particularly in phonological encoding, are not fully understood.
Purpose of the Study:
- To investigate real-time language processing in NPH patients compared to healthy elderly (HE) controls.
- To analyze eye movements during a lexical retrieval task (LRT) to identify differences in cognitive processing.
- To correlate lexical retrieval performance with eye-tracking metrics.
Main Methods:
- 26 participants (14 NPH, 12 HE) underwent eye-tracking during an LRT.
- Statistical analyses included Mann-Whitney U tests, correlation analysis, and two-way mixed ANOVA.
- Qualitative and quantitative analysis of heatmaps and scanpaths visualized eye-tracking data.
Main Results:
- NPH patients demonstrated significantly poorer LRT performance than HE controls.
- NPH patients exhibited increased fixation and saccade counts and durations.
- A negative correlation was found between LRT scores and eye-tracking metrics, with greater differences during incorrect responses.
Conclusions:
- Real-time visual processing analysis reveals under-explored language deficits in NPH.
- Eye-tracking metrics provide insights into the real-time language processing challenges faced by NPH patients.
- Findings emphasize the importance of tailored language interventions for individuals with NPH.
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