A neural-vascular complex of age-related changes in the human brain: Anatomy, physiology, and implications for neurocognitive aging

Dema Abdelkarim, Yuguang Zhao, Monroe P. Turner, Dinesh K. Sivakolundu, Hanzhang Lu, Bart Rypma

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations

Abstract

Theories of neurocognitive aging rely heavily on functional magnetic resonance imaging (fMRI) to test hypotheses regarding the brain basis of age-differences in cognition. This technique is based on the blood-oxygen level dependent signal (BOLD) that arises from the coordinated neural-vascular coupling that leads to increased blood flow following an increase in neural activity. Here we review the literature and current controversies regarding the mechanisms by which blood flow and neural activity are coupled, and how they change in the aging process. This literature suggests that neural-vascular coupling is a complex of processes, involving dynamic signaling between neurons, glia, and blood vessels. Nearly every component of this process is affected in aging leading to changes in BOLD and pervasive age-related cognitive changes.

Original languageEnglish (US)
Pages (from-to)927-944
Number of pages18
JournalNeuroscience and Biobehavioral Reviews
Volume107
DOIs
StatePublished - Dec 2019

Keywords

  • Aging
  • Cognition
  • Cognitive aging
  • Neurovascular coupling
  • Processing speed
  • fMRI

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Cognitive Neuroscience
  • Behavioral Neuroscience

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