Transthalamic Pathways for Cortical Function

Area of Science:

• Neuroscience
• Cognitive Science

Background:

• The cerebral cortex has distinct areas for specific computations.
• Cortical communication enhances processing power for sensation, action, and cognition.
• Understanding inter-area communication is crucial for cortical function.

Purpose of the Study:

• To review evidence for two routes of corticocortical communication.
• To emphasize the unique processing in the transthalamic pathway.
• To discuss implications of disorders affecting transthalamic communication.

Main Methods:

• Review of anatomical evidence.
• Review of physiological evidence.
• Review of behavioral evidence.

Main Results:

• Corticocortical communication historically attributed to direct connections.
• Emerging evidence supports a role for the higher-order thalamus (transthalamic pathway).
• The transthalamic pathway involves cortex-thalamus-cortex projections.

Conclusions:

• Two distinct routes exist for corticocortical communication.
• The transthalamic pathway offers unique processing capabilities.
• Disruptions in transthalamic communication have significant consequences for brain function.