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Published on: May 7, 2014

Age-related differences in brain network activation and co-activation during multiple object tracking.

Erlend S Dørum¹, Dag Alnæs², Tobias Kaufmann²

¹Sunnaas Rehabilitation Hospital HT Nesodden Norway; NORMENT KG Jebsen Centre for Psychosis Research Division of Mental Health and Addiction Oslo University Hospital & Institute of Clinical Medicine University of Oslo Oslo Norway; Department of Psychology University of Oslo Oslo Norway.

Brain and Behavior

|November 16, 2016

Summary

Older adults show declines in sustained attention and altered brain network coordination during tasks. This study reveals age-related differences in how attention networks activate and interact, impacting cognitive performance.

Keywords:

DAN DMN MOT attention cognitive aging default mode network dorsal attention network multiple object tracking

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Published on: December 5, 2014

Area of Science:

Neuroscience
Cognitive Psychology
Aging Research

Background:

Multiple Object Tracking (MOT) measures sustained attention.
Aging is associated with reduced tracking performance.
Age-related effects on brain activation during MOT are not well understood.

Purpose of the Study:

To investigate age-related differences in brain network activation during MOT.
To examine correlations between brain network activations and age.
To understand how coordinated network activation changes with age during attention tasks.

Main Methods:

fMRI data collected during MOT from younger and older adults.
Voxel-wise and independent component analysis used.
Correlations between brain network activations assessed.

Main Results:

Older adults exhibited reduced MOT accuracy.
Decreased load-dependent activation of the dorsal attention network (DAN) in older adults.
Increased load-dependent deactivation of the default mode network (DMN) in older adults.
Younger adults showed stronger within-network correlations (DAN, DMN); older adults showed stronger between-network correlations (DAN-DMN).

Conclusions:

Demonstrated age-related decline in sustained attention using MOT.
Revealed age-related alterations in network recruitment (DAN, DMN).
Indicated age-related changes in coordinated network activation during attention processing.