Structure-function correlations in Retinitis Pigmentosa patients with partially preserved vision: a voxel-based...

Area of Science:

• Neuroscience
• Ophthalmology
• Medical Imaging

Background:

• Retinitis Pigmentosa (RP) causes progressive peripheral vision loss.
• The effect of RP-related vision loss on brain gray matter volume is not well understood.
• Investigating gray matter changes in RP patients with low vision is crucial.

Purpose of the Study:

• To determine if peripheral visual field loss in RP patients leads to changes in cortical gray matter volume.
• To identify specific brain regions affected by visual impairment in RP.
• To correlate gray matter volume changes with the extent of visual field loss.

Main Methods:

• Voxel-based morphometry (VBM) was used to analyze brain gray matter volume.
• 27 RP patients with partially preserved vision and 38 controls were studied.
• Peripheral visual field extent was quantified and correlated with brain imaging data.

Main Results:

• Significant gray matter volume reductions were observed exclusively in the occipital cortex of RP patients.
• Anteromedial patterns of reduced gray matter in visual cortices correlated with peripheral visual field deficits.
• The observed pattern of gray matter loss was directly associated with the severity of visual field loss.

Conclusions:

• RP patients with low vision exhibit specific gray matter loss in visual cortical regions.
• This loss is linked to their visual function profile and the extent of peripheral vision impairment.
• Findings suggest disuse-driven neuronal atrophy with potential implications for RP management and prosthetic strategies.