Tract-based spatial statistics analysis of white matter changes in children with anisometropic amblyopia
| Autor: | Qian Li, Mingxia Guo, Liying Zhai, Qinying Jiang, Wen Qin, Qingji Li, Xiaohui Yin |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Male
medicine.medical_specialty Visual acuity genetic structures Adolescent Visual Acuity Corpus callosum Amblyopia White matter Nerve Fibers Ophthalmology Fasciculus Fractional anisotropy medicine Humans Child biology General Neuroscience biology.organism_classification White Matter eye diseases medicine.anatomical_structure Diffusion Tensor Imaging nervous system Case-Control Studies Child Preschool Data Interpretation Statistical Female medicine.symptom Psychology Neuroscience Optic radiation Tractography Diffusion MRI |
| Zdroj: | Neuroscience letters. 597 |
| ISSN: | 1872-7972 |
| Popis: | Amblyopia is a neurological disorder of vision that follows abnormal binocular interaction or visual deprivation during early life. Previous studies have reported multiple functional or structural cortical alterations. Although white matter was also studied, it still cannot be clarified clearly which fasciculus was affected by amblyopia. In the present study, tract-based spatial statistics analysis was applied to diffusion tensor imaging (DTI) to investigate potential diffusion changes of neural tracts in anisometropic amblyopia. Fractional anisotropy (FA) value was calculated and compared between 20 amblyopic children and 18 healthy age-matched controls. In contrast to the controls, significant decreases in FA values were found in right optic radiation (OR), left inferior longitudinal fasciculus/inferior fronto-occipital fasciculus (ILF/IFO) and right superior longitudinal fasciculus (SLF) in the amblyopia. Furthermore, FA values of these identified tracts showed positive correlation with visual acuity. It can be inferred that abnormal visual input not only hinders OR from well developed, but also impairs fasciculi associated with dorsal and ventral visual pathways, which may be responsible for the amblyopic deficiency in object discrimination and stereopsis. Increased FA was detected in right posterior part of corpus callosum (CC) with a medium effect size, which may be due to compensation effect. DTI with subsequent measurement of FA is a useful tool for investigating neuronal tract involvement in amblyopia. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect