Age-related visual dynamics in HIV-infected adults with cognitive impairment

Boman R. Groff, Alex I. Wiesman, Michael T. Rezich, Jennifer O'Neill, Kevin R. Robertson, Howard S. Fox, Susan Swindells, Tony W. Wilson

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

OBJECTIVE: To investigate whether aging differentially affects neural activity serving visuospatial processing in a large functional neuroimaging study of HIV-infected participants and to determine whether such aging effects are attributable to differences in the duration of HIV infection. METHODS: A total of 170 participants, including 93 uninfected controls and 77 HIV-infected participants, underwent neuropsychological assessment followed by neuroimaging with magnetoencephalography (MEG). Time-frequency analysis of the MEG data followed by advanced image reconstruction of neural oscillatory activity and whole-brain statistical analyses were used to examine interactions between age, HIV infection, and cognitive status. Post hoc testing for a mediation effect of HIV infection duration on the relationship between age and neural activity was performed using a quasi-Bayesian approximation for significance testing. RESULTS: Cognitively impaired HIV-infected participants were distinguished from unimpaired HIV-infected and control participants by their unique association between age and gamma oscillations in the parieto-occipital cortex. This relationship between age and gamma was fully mediated by the duration of HIV infection in cognitively impaired participants. Impaired HIV-infected participants were also distinguished by their atypical relationship between alpha oscillations and age in the superior parietal cortex. CONCLUSIONS: Impaired HIV-infected participants exhibited markedly different relationships between age and neural responses in the parieto-occipital cortices relative to their peers. This suggests a differential effect of chronological aging on the neural bases of visuospatial processing in a cognitively impaired subset of HIV-infected adults. Some of these relationships were fully accounted for by differences in HIV infection duration, whereas others were more readily associated with aging.

Original languageEnglish (US)
JournalNeurology(R) neuroimmunology & neuroinflammation
Volume7
Issue number3
DOIs
StatePublished - May 1 2020

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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