کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4034043 1603236 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of age on the spatial and temporal integration of global motion
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
The effects of age on the spatial and temporal integration of global motion
چکیده انگلیسی

The purpose of this study was to determine the relative contributions of local element speed and/or spatial displacement to age-related deficits in global motion processing. Motion coherence thresholds (79% correct) were measured for discriminating the direction of translational random dot kinematograms (RDKs) as a function of dot speed and spatial displacement across the adult lifespan (20–79 years). Age-related impairments in global motion processing were only apparent in observers 70–79 years of age. In agreement with previous studies, we found an age-related impairment at low (0.625 deg/s) and high speeds (10 deg/s). However, these effects were heavily mediated by dot spatial displacement. Motion coherence thresholds were also most markedly elevated in women aged over 70 years. These findings suggest a prominent role of spatial integration in global motion processing. Moreover, global motion perception appears to be relatively well preserved until around 70 years of age.


► We used kinematograms to assess global motion perception across the adult lifespan.
► Results show the perception of global motion is well preserved until the age of 70.
► Age differences were only evident when dot spatial displacement was varied.
► Suggests that age-related deficits may reflect impairments in spatial integration.
► Women ⩾70 years appear to demonstrate the most marked decline in perception.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 58, 1 April 2012, Pages 27–32
نویسندگان
, , ,