Visual Perception

161.

Response error correction--a demonstration of improved human-machine performance using real-time EEG monitoring.

We describe a brain-computer interface (BCI) system, which uses a set of adaptive linear preprocessing and classification algorithms for single-trial detection of error related negativity (ERN). We use the detected ERN as an estimate of a subjects ...
Lucas C Parra, Clay D Spence, Adam D Gerson, Paul Sajda (IEEE Trans Neural Syst Rehabil Eng, 200306)
response-error-correction-demonstration-improved-human-machine.asp

162.

Rapid detection of threshold VEPs.

OBJECTIVE: To determine whether a one-dimensional (1D) Laplacian analysis detects steady-state visual evoked potentials (ssVEPs) faster than the standard O(z)-F(z) montage and to establish the optimum position of Laplacian reference electrodes. METHODS: ...
Alison M Mackay, Michael S Bradnam, Ruth Hamilton (Clin Neurophysiol, 200306)
rapid-detection-threshold-veps.asp

163.

A BCI-based environmental controller for the motion-disabled.

With the development of brain-computer interface (BCI) technology, researchers are now attempting to put current BCI techniques into practical application. This paper presents an environmental controller using a BCI technique based on steady-state visual ...
Xiaorong Gao, Dingfeng Xu, Ming Cheng, Shangkai Gao (IEEE Trans Neural Syst Rehabil Eng, 200306)
bci-based-environmental-controller-motion-disabled.asp

164.

EEG changes accompanying learned regulation of 12-Hz EEG activity.

We analyzed 15 sessions of 64-channel electroencephalographic (EEG) data recorded from a highly trained subject during sessions in which he attempted to regulate power at 12 Hz over his left- and right-central scalp to control the altitude of a cursor ...
Arnaud Delorme, Scott Makeig (IEEE Trans Neural Syst Rehabil Eng, 200306)
eeg-changes-accompanying-learned-regulation-hz-eeg-activity.asp

165.

The influence of visual motion on fast reaching movements to a stationary object.

One of the most important functions of vision is to direct actions to objects. However, every time that vision is used to guide an action, retinal motion signals are produced by the movement of the eye and head as the person looks at the object or by the ...
David Whitney, David A Westwood, Melvyn A Goodale (Nature, 200306)
influence-visual-motion-fast-reaching-movements-stationary-object.asp

166.

Visual masking as a probe for abnormal gamma range activity in schizophrenia.

BACKGROUND: Visual masking procedures assess very early stages of visual perception. Patients with schizophrenia consistently show deficits on visual masking tasks, and these deficits likely reflect vulnerability to schizophrenia. We conducted two ...
Michael Foster Green, Jim Mintz, Dustin Salveson, Keith H Nuechterlein, Bruno Breitmeyer, Gregory A Light, David L Braff (Biol Psychiatry, 200306)
visual-masking-probe-abnormal-gamma-range-activity-schizophrenia.asp

167.

Arm movement and gap as factors influencing the reaction time of the second saccade in a double-step task.

To guide our hand for reaching, we explore our visual environment by sequences of saccades. In the present paper, we studied the eye and hand movements of human subjects looking or looking and pointing at a target that is instantaneously displaced two ...
Lars Lünenburger, Klaus-Peter Hoffmann (Eur J Neurosci, 200306)
arm-movement-gap-factors-influencing-reaction-time-second-saccade.asp

168.

Current trends in brain-computer interface research at the Neil Squire Foundation.

The Neil Squire Foundation (NSF) is a Canadian nonprofit organization whose purpose is to create opportunities for independence for individuals who have significant physical disabilities. Over the last ten years, our team in partnership with researchers ...
Gary E Birch, Steven G Mason, Jaimie F Borisoff (IEEE Trans Neural Syst Rehabil Eng, 200306)
current-trends-brain-computer-interface-research-neil-squire.asp

169.

Use of the evoked potential P3 component for control in a virtual apartment.

Virtual reality (VR) may prove useful for training individuals to use a brain-computer interface (BCI). It could provide complex and controllable experimental environments during BCI research and development as well as increase user motivation. In the ...
Jessica D Bayliss (IEEE Trans Neural Syst Rehabil Eng, 200306)
evoked-potential-p-component-control-virtual-apartment.asp

170.

Accommodation and vergence require effort-to-see.

PURPOSE: Accommodation and vergence both appear to be influenced by multiple nonsensory factors. "Effort-to-see" is one of these factors. This study was designed to assess the extent to which effort-to-see affects accommodation and vergence. METHOD: Nine ...
Ellie L Francis, Bai-chuan Jiang, D Alfred Owens, Richard A Tyrrell (Optom Vis Sci, 200306)
accommodation-vergence-require-effort-see.asp