Effect of stress on structural brain asymmetry

Area of Science:

• Neuroscience
• Neurobiology
• Behavioral Science

Background:

• Stressful events can impact brain structure and function.
• Brain asymmetry (lateralization) is a key feature in many species.
• Understanding stress's effect on brain asymmetry is crucial for neuroscience.

Purpose of the Study:

• To review the effects of stress and stress hormones on structural brain asymmetry.
• To explore the evolutionary perspective of structural brain asymmetries.
• To examine the asymmetrical effects of stress on specific brain regions.

Main Methods:

• Literature review of animal and human studies.
• Analysis of findings on structural brain asymmetry from an evolutionary viewpoint.
• Exploration of stress's impact on lateralized brain structures, considering steroids, trauma, and genetics.

Main Results:

• Stress can induce asymmetrical structural changes in the brain.
• Specific brain areas like the amygdala, hippocampus, and neocortex show lateralized responses to stress.
• Evolutionary and genetic factors, alongside hormonal influences, modulate stress-induced brain asymmetry.

Conclusions:

• Stress has demonstrable asymmetrical effects on the structure of lateralized brain regions.
• Further research is needed to fully elucidate the mechanisms behind stress-induced asymmetrical brain changes.
• This review provides a framework for understanding the complex interplay between stress, brain lateralization, and neuroplasticity.