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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
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Right hemisphere role in cognitive reserve.

Ian H Robertson1

  • 1Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin, Ireland.

Neurobiology of Aging
|January 1, 2014
PubMed
Summary

Cognitive reserve, linked to education and intelligence, may be mediated by noradrenaline (NA). This neurotransmitter supports attention, awareness, and working memory, potentially protecting the brain from damage.

Keywords:
AgingAlzheimer's diseaseArousalAwarenessBrain damageBrain disorderBrain reserveCognitive reserveNoradrenalineNoveltySustained attention

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Cognitive reserve, encompassing education, occupation, and intelligence, mitigates cognitive impairment despite brain pathology.
  • This phenomenon is observed across various neurological conditions like Alzheimer's disease and stroke.
  • Noradrenaline (NA) is implicated as a key neurotransmitter in mediating cognitive reserve's protective effects.

Purpose of the Study:

  • To review the neural network potentially underlying cognitive reserve.
  • To identify the neurocognitive correlates of noradrenergic activity.
  • To propose a mechanism through which noradrenaline contributes to cognitive reserve.

Main Methods:

  • Literature review of studies on cognitive reserve and noradrenergic function.
  • Identification of cognitive processes modulated by noradrenaline.
  • Analysis of brain regions associated with noradrenergic activity and cognitive reserve.

Main Results:

  • Noradrenergic activity is linked to arousal, sustained attention, novelty response, and awareness, primarily in the right fronto-parietal network.
  • Working memory is also significantly modulated by noradrenaline.
  • These cognitive processes, facilitated by NA, may offer adaptive mechanisms against age-related changes and disease.

Conclusions:

  • The noradrenergic system, through its influence on attention, awareness, and working memory, is a plausible neural network contributing to cognitive reserve.
  • Maintaining the structural and functional integrity of the right prefrontal and inferior parietal lobes may enhance cognitive reserve.
  • This neurobiological pathway offers a potential mechanism for mitigating the behavioral expression of brain damage.