Residual motion perception in a "motion-blind" patient, assessed with limited-lifetime random dot stimuli
نویسندگان
چکیده
منابع مشابه
Residual motion perception in a "motion-blind" patient, assessed with limited-lifetime random dot stimuli.
A neurological patient (L.M.) suffering a specific loss of visual motion perception (Zihl et al., 1983) due to extrastriate cortical damage was studied using random dot "limited-lifetime" stimuli with a direction discrimination task. With a stimulus like that of Newsome and Pare (1988), the patient exhibited a severe deficit for motion perception, only being able to perform well for very high v...
متن کاملPerception of limited-lifetime biological motion from different viewpoints.
Studies with time-limited point-lights suggested that biological motion does not require local motion detection. These studies used walkers seen from the side, but biological motion perception excels also when walkers are oriented toward the observer, or in intermediate, half-profile views. In perspective projection, the local motion of points on the body provides a cue to the 3D structure of t...
متن کاملReversed-phi perception with motion-defined motion stimuli
Perception of reversed-phi with motion-defined motion (MDM) stimuli was examined while varying various parameters including eccentricity. For peripheral viewing, reversed-phi was observed at all displacements between 30 degrees and 135 degrees. The perception most prominent at 90 degrees, but was disrupted by dichoptic presentation. These results suggest operations of an energy-based motion sys...
متن کاملPerformance Characterization of Watson Ahumada Motion Detector Using Random Dot Rotary Motion Stimuli
The performance of Watson & Ahumada's model of human visual motion sensing is compared against human psychophysical performance. The stimulus consists of random dots undergoing rotary motion, displayed in a circular annulus. The model matches psychophysical observer performance with respect to most parameters. It is able to replicate some key psychophysical findings such as invariance of observ...
متن کاملThe basis of area and dot number effects in random dot motion perception.
Random dot kinematograms present a patch of random dots, uniformly displaced from one frame to the next. We have re-examined the question of whether the limiting displacement for this short-range apparent motion is determined by the retinal angle or by the number of pixels across which the patch is displaced; our data support the former hypothesis. The number of dots in the patch is not a confo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Neuroscience
سال: 1991
ISSN: 0270-6474,1529-2401
DOI: 10.1523/jneurosci.11-02-00454.1991