Long-Term Influence of Pediatric Long COVID Syndrome on Visual Perception and Neuropsychiatric Symptoms

Abstract

Background: Long COVID presents with a wide range of persistent symptoms and durations following coronavirus disease 2019 (COVID-19) infection. However, data on children and adolescents remain limited. This study aims to explore visual perception and neuropsychiatric symptoms in pediatric patients and examine their associations with brain volume differences. Methods: A total of 60 participants, aged six to 18 years and confirmed COVID-19 antibody positive, were recruited five to eight months after infection. Owing to the diversity of symptoms, each symptom was assigned a weighted score from 0 to 3 based on its severity and relevance to brain function. Participants were then divided into two groups according to symptom severity. All participants underwent magnetic resonance imaging, and the Test of Visual Perceptual Skills-Fourth Edition (TVPS-4) was administered. Results: The most common neuropsychiatric symptoms were headache or dizziness, along with attention and memory deficits, which persisted for up to six months. Gray matter volumes were significantly increased in the group with severe symptoms, particularly in subcortical and temporal regions. These brain volume differences showed significant correlations with both acute and chronic symptoms. In the TVPS-4 assessment, significant differences were observed in overall standard scores and in the Sequential Memory subtest between participants with visual-related symptoms and healthy control subjects. Conclusions: Neuropsychiatric symptoms, impaired visual perception, and gray matter volume differences are evident in pediatric long COVID cases. The severity of neuropsychiatric symptoms during the acute phase may predict the degree of chronic-phase brain volume alterations. Longitudinal follow-up studies are essential to validate and expand upon these findings.