In this study, how the state of eye movement before saccade affected the response to a stimulus was explored. The state of eye movement before saccade was either smooth pursuit or fixation. The smooth pursuit was carried out both clockwise and counter-clockwise. Using an eye-tracking system, the eye movement during the experimental task was monitored. The response time to a stimulus was measure...

Rapid eye movement sleep behaviour disorder is a rapid eye movement parasomnia clinically characterized by acting out dreams due to disinhibition of muscle tone in rapid eye movement sleep. Up to 80-90% of the patients with rapid eye movement sleep behaviour disorder develop neurodegenerative disorders within 10-15 years after symptom onset. The disorder is reported in 45-60% of all narcoleptic...

Eye movements introduce large artifacts to electroencephalographic recordings (EEG) and thus render data analysis difficult or even impossible. Trials contaminated by eye movement and blink artifacts have to be discarded, hence in standard EEG-paradigms subjects are required to fixate on the screen. To overcome this restriction, several correction methods including regression and blind source s...

The counterilluminating ventral ocular photophores of Galiteuthis phyllura and Chiroteuthis calyx appear to continuously orient ventrally regardless of body orientation. Because both species have a round pupil in a round eye, there is no visual method of monitoring eye movement in comparison to photophore movement. Eye tissue sections elucidate the mechanical relationship between the photophore...

Correspondence: María Corsi-Cabrera, Sleep Laboratory, Facultad de Psicología, Posgrado, Universidad Nacional Autónoma de México, Av. Universidad 3004, México, D.F. 04510, México. Phone: (52-55)6-22-22-51; Fax: (52-55)6-22-23-10. [email protected] Abstract. Gamma EEG and MEG activity was studied immediately after REM sleep eye movement onset as an index of cortical activation. Two strateg...

Currently there is considerable debate as to the nature of the pathways that are responsible for the perception and motor performance. We have studied the relationship between perceived speed, which is the experiential representation of a moving stimulus, and the speed of smooth pursuit eye movements, the motor action. We determined psychophysical thresholds for detecting small perturbations in...

Visual search is an integral component in many human activities. The eye movements produced during such activities can provide valuable information about people’s cognitive processes. This research investigates, with detailed eye movement data analysis and computational cognitive modeling, the perceptual, strategic, and oculomotor processes people use to visually search. A cognitive model is ev...

Aiming at the fact that psychological state can be reflected by eye movement and pupil size, an affective assessment method based on the joint model of eye movement trajectory and pupil scaling was proposed in this paper. Firstly, the experimental apparatus was developed to capture and transmit the eye images. Secondly, multiple advanced image processing algorithms were synthetically adopted to...