Visual Field Reconstruction in Hemianopia Using fMRI Based Mapping Techniques.

ABSTRACT:

Purpose

A stroke that includes the primary visual cortex unilaterally leads to a loss of visual field (VF) representation in the hemifield contralateral to the damage. While behavioral procedures for measuring the VF, such as perimetry, may indicate that a patient cannot see in a particular area, detailed psychophysical testing often detects the ability to perform detection or discrimination of visual stimuli ("blindsight"). The aim of this study was to determine whether functional magnetic resonance imaging (fMRI) could be used to determine whether perimetrically blind regions of the VF were still represented in VF maps reconstructed on the basis of visually evoked neural activity.

Methods

Thirteen patients with hemianopia and nine control participants were scanned using 3T

SUBMITTER: Halbertsma HN 

PROVIDER: S-EPMC8382851 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature