Monitoring eye movements during fMRI tasks with echo planar images.
Hum Brain Mapp
; 17(4): 237-43, 2002 Dec.
Article
em En
| MEDLINE
| ID: mdl-12395391
ABSTRACT
Verifying task compliance during functional magnetic resonance imaging (fMRI) experiments is an essential component of experimental design. To date, studies of oculomotor tasks such as smooth pursuit eye movements have either measured task performance outside the magnet and assumed similar performance during functional neuroimaging, or have used MR-compatible eye movement recording devices, which can be costly and technically difficult to use. We describe a simple method to visualize and quantify eye movements during an imaging experiment using the gradient echo images. We demonstrate that local eye movements will influence whole-head motion correction procedures, resulting in inaccurate movement parameters and potentially lowering the sensitivity to detect activations.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Mapeamento Encefálico
/
Imagem Ecoplanar
/
Movimentos Oculares
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Hum Brain Mapp
Assunto da revista:
CEREBRO
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Estados Unidos