Aged 1 Brain 1 Brain Mapping 1 Cognition 1 Electroencephalography 1 Healthy aging 1 Humans 1 Memory, Short-Term 1 Microstates 1 Spontaneous brain activity 1 Working memory performance adult 1 aged 1 article 1 attention 1 brain 1 brain mapping 1 brain region 1 cognition 1 cognitive aging 1 controlled study 1 electroencephalogram 1 electroencephalography 1 exploratory research 1 frontal cortex 1 healthy aging 1 human 1 probability 1 short term memory 1 working memory 1