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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

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Endogenous attention to object features modulates the ERP C1 component.

Alberto Zani^1,2, Alice Mado Proverbio²

¹a Cognitive Electrofunctional Imaging Lab, Institute of Molecular Bioimaging and Physiology (IBFM) , National Research Council (CNR) , Milan , Italy.

Cognitive Neuroscience

|September 19, 2017

Summary

This summary is machine-generated.

Selective attention modulates brain activity in both the visual cortex (V1) and subcortical areas like the lateral geniculate nucleus (LGN). This modulation is more pronounced with endogenous cues for object-based attention, unlike exogenous cues.

Keywords:

Attention orienting C1 V1 object-based attention spatial frequency

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Area of Science:

Neuroscience
Cognitive Science
Visual Perception

Background:

Selective attention influences neural processing in the brain.
Evidence suggests attention modulates activity in early visual areas and subcortical structures.

Purpose of the Study:

To investigate the impact of different attentional cues on neural modulation in V1 and LGN.
To determine if object-based attention is differentially affected by endogenous versus exogenous cues.

Main Methods:

Utilizing neuroimaging and electrophysiological techniques.
Analyzing neural activity, specifically the early component of the event-related potential (ERP) C1, reflecting V1 modulation.

Main Results:

Neural activity in V1 (BA17) and LGN is modulated by selective attention as early as 40-60 ms post-stimulus.
V1 modulation occurs under both space-based and object-based attention, particularly with endogenous orienting.
Exogenous cuing may not strongly facilitate object-based attentional modulation of the V1-related C1 response.

Conclusions:

Selective attention exerts widespread effects on visual processing, from early cortical to subcortical levels.
The type of attentional cue (endogenous vs. exogenous) influences the effectiveness of attentional modulation, especially for object-based attention.