Attention, consciousness, and electrical wave activity within the cortical column

Area of Science:

• Neuroscience
• Cognitive Science
• Computational Neuroscience

Background:

• The triangular circuit theory of attention provides a framework for understanding attentional processes.
• Existing theories may not fully encompass both brief and sustained forms of attention.
• Pyramidal neurons in cortical columns are fundamental to neural processing and attention.

Purpose of the Study:

• To extend the triangular circuit theory of attention to the activity of pyramidal neurons.
• To account for both brief and sustained attention mechanisms.
• To propose a neural basis for subjective experience and consciousness.

Main Methods:

• Theoretical extension of the triangular circuit theory.
• Modeling of pyramidal neuron activity in cortical columns.
• Correlation of neural activity with electroencephalography (EEG) oscillations.

Main Results:

• Sustained attention is proposed to involve wave-like surges of current in apical dendrites of pyramidal neurons.
• Intense wave activity can be detected as EEG oscillations.
• Selective attention may involve enhanced processing of neural signals at the soma.

Conclusions:

• The expanded theory offers a unified explanation for different types of attention.
• Neural wave activity in pyramidal neurons is hypothesized to generate subjective experience.
• Distinctions are made between foreground (object experience) and background (consciousness) experience based on neural origin.