Elsevier

Neurobiology of Aging

Volume 62, February 2018, Pages 72-81
Neurobiology of Aging

Regular article
Higher-order cognitive training effects on processing speed–related neural activity: a randomized trial

https://doi.org/10.1016/j.neurobiolaging.2017.10.003Get rights and content
Under a Creative Commons license
open access

Abstract

Higher-order cognitive training has shown to enhance performance in older adults, but the neural mechanisms underlying performance enhancement have yet to be fully disambiguated. This randomized trial examined changes in processing speed and processing speed–related neural activity in older participants (57–71 years of age) who underwent cognitive training (CT, N = 12) compared with wait-listed (WLC, N = 15) or exercise-training active (AC, N = 14) controls. The cognitive training taught cognitive control functions of strategic attention, integrative reasoning, and innovation over 12 weeks. All 3 groups worked through a functional magnetic resonance imaging processing speed task during 3 sessions (baseline, mid-training, and post-training). Although all groups showed faster reaction times (RTs) across sessions, the CT group showed a significant increase, and the WLC and AC groups showed significant decreases across sessions in the association between RT and BOLD signal change within the left prefrontal cortex (PFC). Thus, cognitive training led to a change in processing speed–related neural activity where faster processing speed was associated with reduced PFC activation, fitting previously identified neural efficiency profiles.

Keywords

Aging
Cognitive training
Reasoning
Processing speed
Neuroplasticity
fMRI
DSVT
Exercise

Cited by (0)

ClinicalTrials.gov, NCT# 00977418.

1

These authors contributed equally.