The role of contrast sensitivity in global motion processing deficits in the elderly
- PMID: 20884480
- DOI: 10.1167/10.10.15
The role of contrast sensitivity in global motion processing deficits in the elderly
Abstract
This study compared the effects of age on the perception of translational, radial, and rotational global motion patterns. Motion coherence thresholds were measured for judging the direction of each motion type as a function of contrast (visibility) and temporal sampling rate in young and elderly participants. Coherence thresholds decreased as dot contrast increased asymptoting at high dot contrasts but were higher in elderly compared to young participants. This equated to global motion impairment in the elderly of a factor of around 2, characterized by a shift of the threshold vs. contrast function along the horizontal axes (dot contrast). The effect of contrast interacted with the temporal sampling rate. Old participants were deleteriously affected by reduced temporal sampling particularly at low contrasts. The findings suggest that age-related changes in global motion perception may be driven principally by deficits in contrast encoding, rather than by deficits in motion integration and suggest a role for increased internal noise in the older visual system.
Similar articles
-
Binocular influences on global motion processing in the human visual system.Vision Res. 2007 Jun;47(12):1682-92. doi: 10.1016/j.visres.2007.02.005. Epub 2007 Apr 17. Vision Res. 2007. PMID: 17442362 Clinical Trial.
-
Second-order optic flow deficits in amblyopia.Invest Ophthalmol Vis Sci. 2007 Dec;48(12):5532-8. doi: 10.1167/iovs.07-0447. Invest Ophthalmol Vis Sci. 2007. PMID: 18055802
-
The effects of age on the spatial and temporal integration of global motion.Vision Res. 2012 Apr;58:27-32. doi: 10.1016/j.visres.2012.02.004. Epub 2012 Feb 26. Vision Res. 2012. PMID: 22391511
-
Motion perception getting better with age?Neuron. 2005 Feb 3;45(3):325-7. doi: 10.1016/j.neuron.2005.01.017. Neuron. 2005. PMID: 15694315 Review.
-
Psychophysical correlates of global motion processing in the aging visual system: a critical review.Neurosci Biobehav Rev. 2012 Apr;36(4):1266-72. doi: 10.1016/j.neubiorev.2012.02.009. Epub 2012 Feb 16. Neurosci Biobehav Rev. 2012. PMID: 22343109 Review.
Cited by
-
The possible positive effects of physical exercise on the global motion perception aging: the cognitive mechanism.Front Psychol. 2024 Jan 24;15:1323291. doi: 10.3389/fpsyg.2024.1323291. eCollection 2024. Front Psychol. 2024. PMID: 38328382 Free PMC article.
-
Processing of translational, radial and rotational optic flow in older adults.Sci Rep. 2023 Sep 15;13(1):15312. doi: 10.1038/s41598-023-42479-2. Sci Rep. 2023. PMID: 37714896 Free PMC article.
-
Impaired motion perception is associated with functional and structural visual pathway damage in multiple sclerosis and neuromyelitis optica spectrum disorders.Mult Scler. 2022 Apr;28(5):757-767. doi: 10.1177/13524585211032801. Epub 2021 Aug 11. Mult Scler. 2022. PMID: 34379018 Free PMC article.
-
Decline of Orientation and Direction Sensitivity in the Aging Population.Front Neurosci. 2021 Apr 7;15:643414. doi: 10.3389/fnins.2021.643414. eCollection 2021. Front Neurosci. 2021. PMID: 33897356 Free PMC article.
-
Look where you go: Characterizing eye movements toward optic flow.J Vis. 2021 Mar 1;21(3):19. doi: 10.1167/jov.21.3.19. J Vis. 2021. PMID: 33735378 Free PMC article.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources
Medical