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Related Concept Videos

Cognitivism01:17

Cognitivism

Cognitive psychology emerged as a significant field in the mid-20th century. It focused on understanding humans' internal mental processes. This approach emphasizes how people perceive, remember, think, and solve problems—elements critical to human cognition.
Previously dominated by behaviorism, which prioritized observable behaviors and largely ignored mental processes, psychology transformed in the 1950s. Cognitive psychologists argue that understanding how we think and process information is...

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Cognitive neurology: stimulating research on neglect.

Jacinta O'Shea1

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Attention deficits following right-hemisphere stroke are partly due to overactive neural pathways in the undamaged left hemisphere. This study offers the first direct physiological evidence supporting this mechanism in brain function.

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Science

Background:

  • Right-hemisphere stroke often leads to attention deficits.
  • The underlying neural mechanisms for these deficits remain incompletely understood.
  • Previous research suggests hemispheric interactions play a role in attention.

Purpose of the Study:

  • To investigate the physiological basis of attention deficits after right-hemisphere stroke.
  • To determine the role of neural pathway excitability in the undamaged hemisphere.
  • To provide direct evidence for the contribution of left-hemisphere hyper-excitation.

Main Methods:

  • Utilized a brain stimulation study design.
  • Measured physiological responses related to neural pathway activity.
  • Focused on participants with a history of right-hemisphere stroke.

Main Results:

  • Found direct physiological evidence linking attention deficits to neural activity.
  • Identified hyper-excitation of neural pathways in the undamaged left hemisphere.
  • Demonstrated a partial contribution of this hyper-excitation to attention impairments.

Conclusions:

  • Attention deficits post-right-hemisphere stroke are partly mediated by left-hemisphere hyper-excitability.
  • This finding offers a novel physiological explanation for attentional impairments.
  • Suggests potential targets for therapeutic interventions aimed at modulating neural excitability.