Cerebral Potentials Preceding Visually Triggered Saccades
نویسندگان
چکیده
منابع مشابه
Event-related power modulations of brain activity preceding visually guided saccades.
To analyze the characteristics of the event-related desynchronization (ERD) and synchronization (ERS) of cortical rhythms during the preparation and execution of a lateralized eye movement, EEG was recorded in normal subjects during a visually guided task. Alpha and beta bands were investigated in three temporal intervals: a sensory period, a delay period and a saccade preparation period time l...
متن کاملEye movements induced by pontine stimulation: interaction with visually triggered saccades.
1. Rhesus monkeys were trained to look to brief visual targets presented in an otherwise darkened room. On some trials, after the visual target was extinguished but before a saccade to it could be initiated, the eyes were driven to another orbital position by microstimulation of the paramedian pontine reticular formation. If, as current models of the saccadic system suggest, a copy of the motor...
متن کاملSuppressive interactions underlying visually evoked fixational saccades
Small saccades occur frequently during fixation, and are coupled to changes in visual stimulation and cognitive state. Neurophysiologically, fixational saccades reflect neural activity near the foveal region of a continuous visuomotor map. It is well known that competitive interactions between neurons within visuomotor maps contribute to target selection for large saccades. Here we asked how su...
متن کاملSensorimotor transformation for visually guided saccades.
Visually guided movements require the brain to perform a sensorimotor transformation. The key to understanding this transformation is to understand the different roles of the superior colliculus (SC) and cerebellum (CB). The SC has a three-layered structure. Cells in the top layer have visual, but not motor, responses. However, cells in the deeper layers have both visual and motor responses. Th...
متن کاملEffects of lesions of the human posterior thalamus on ocular fixation during voluntary and visually triggered saccades.
OBJECTIVE To investigate the role of the posterior thalamus in controlling voluntary and visually triggered eye movements and ocular fixation. METHODS The latency to initiate saccades to peripheral targets (visually triggered) and in response to verbal commands (voluntary) was measured in three patients with unilateral lesions of the posterior thalamus, in normal controls, and in neurological...
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ژورنال
عنوان ژورنال: Annals of the New York Academy of Sciences
سال: 1984
ISSN: 0077-8923,1749-6632
DOI: 10.1111/j.1749-6632.1984.tb23563.x