Visual and proprioceptive shifts in perceived egocentric direction induced by eye-position
نویسندگان
چکیده
The relation of three main effects of eye-position on perceived direction was investigated using a method of hand pointing in the horizontal plane: (1) Retinal eccentricity is overestimated with respect to the fovea by a constant factor of 2.6 degrees; (2) an extraretinal signal induces a shift in perceived visual direction (slope 0.12) that is opposite to the direction of eccentric gaze; and (3) the perceived position of the median plane of the head shifts toward the direction of eccentric eye-position (slope 0.23) while perceived trunk position remains unchanged.
منابع مشابه
Decreased Visual Attention Further from the Perceived Direction of Gaze for Equidistant Retinal Targets
The oculomotor and spatial attention systems are interconnected. Whereas a link between motor commands and spatial shifts in visual attention is demonstrated, it is still unknown whether the recently discovered proprioceptive signal in somatosensory cortex impacts on visual attention, too. This study investigated whether visual targets near the perceived direction of gaze are detected more accu...
متن کاملRelative contributions of the two eyes to perceived egocentric visual direction in normal binocular vision
Perceived egocentric direction (EVD) is based on the sensed position of the eyes in the orbit and the oculocentric visual direction (eye-centered, OVD). Previous reports indicate that in some subjects eye-position information from the two eyes contributes unequally to the perceived EVD. Findings from other studies indicate that the retinal information from the two eyes may not always contribute...
متن کاملVisual Perception of Direction for Stimuli Flashed During Voluntary Saccadic Eye Movements.
In two different experiments, subjects reported on the visual direction of a flash presented during a voluntary saccade relative to the visual direction of a stimulus viewed prior to the saccade. Under the conditions of the first experiment the report given by the subject was primarily determined by the relative retinal positions of the two stimuli. In the second experiment evidence was obtaine...
متن کاملBi-directional illusory position shifts toward the end point of apparent motion
In this study, we examined the relation between motion induced position shifts and the position shifts caused by saccades. When a stimulus is flashed briefly around the time of a saccade, its perceived position is mislocalized toward the saccade target: if the flash is in front of the saccade the test flash appears shifted in the direction of eye movement; but a test flashed beyond the saccade ...
متن کاملDecrease of contralateral neglect by neck muscle vibration and spatial orientation of trunk midline.
Three patients with a right hemisphere lesion and marked left-sided neglect without visual field defects were asked to detect and identify stimuli which were tachistoscopically presented in the left or right visual half-field. Neglect of stimuli presented in the contralesional left visual field, which was observed when the patient's body was in a normal upright position with trunk, head and gaz...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Vision Research
دوره 40 شماره
صفحات -
تاریخ انتشار 2000