[The control of gaze (2): cortical control of ocular saccades: functional brain imaging data].
Saccades are very rapid eye movements allowing us to explore the visual world. Although most of the time unconscious, the programming of each saccade implies a complex decision which depends upon both the perceptual context and the intentions of the subject. The cerebral cortex is critically involved in deciding where, when and in which sequence we move the eyes. Using sophisticated experimental designs, such as the learning of sequences of saccades, has revealed that besides a core fronto-parietal circuit, prefrontal, cingulate, and mediotemporal regions seem critically involved in higher level oculomotor control. Understanding precisely the cortical networks associated to different components of ocular movements can certainly be very useful to characterize, test, and eventually detect various kinds of neurological pathology.
Département de neuropsychologie, Institut et Hôpital neurologique de Montréal, 3801, rue University, Montréal, Québec H3A 2B4, Canada. marieg@bic.mni.mcgill.ca
Marie-Hélène
MH
Grosbras
Elie
E
Lobel
Alain
A
Berthoz
D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000473:pathology* / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D012438:Saccades / Q000502:physiology*; D013028:Space Perception / Q000502:physiology; D014055:Tomography, Emission-Computed