Vibrotactile spatial summation
نویسندگان
چکیده
منابع مشابه
Spatial summation of vibrotactile sensations at the foot.
Thresholds for the perception of vibration on the hand reduce with increasing area of excitation when the thresholds are mediated by the Pacinian channel (a phenomenon known as spatial summation) but thresholds are generally independent of the area of excitation when they are mediated by non-Pacinian channels. The effect of the area of excitation on vibrotactile thresholds at the sole of the fo...
متن کاملVibrotactile temporal summation: probability summation or neural integration?
Temporal summation, a decrease in the detection threshold that occurs when either the duration of a stimulus or the number of stimuli in a sequence is increased, has been attributed to the operations of either the mechanism of neural integration or of probability summation. Our experiments indicate that under certain conditions, both mechanisms may operate, but that the process of neural integr...
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Do all parts of the face contribute equally to face detection or are some parts more detectable than others? To evaluate this issue, we studied detection of the presence of normalized frontal-face images within aperture windows of varying extent. We performed a face summation study using two-alternative forced-choice psychophysics. The face stimuli were scaled to equal eye-to-chin distance, cen...
متن کاملSpatial Factors in Vibrotactile Pattern Perception
The spatial acuity of the skin for pressure stimuli has been explored extensively, but there have been few attempts to study spatial resolution for vibratory stimuli of the type used in tactile aids for sensory disability or to augment communication. Because vibrotactile spatial acuity has never been empirically determined at such sites, pattern perception with these devices might be poorer tha...
متن کاملCompressive spatial summation in human visual cortex.
Neurons within a small (a few cubic millimeters) region of visual cortex respond to stimuli within a restricted region of the visual field. Previous studies have characterized the population response of such neurons using a model that sums contrast linearly across the visual field. In this study, we tested linear spatial summation of population responses using blood oxygenation level-dependent ...
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ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 1968
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03209532