According to the 'minority view', the initial afferent processing on C1 can be modulated by attention under certain experimental conditions. However, evidence supporting this 'minority view' is relatively rare and needs more replication, and the optimal conditions for eliciting attentional modulations on C1 have not yet been clearly defined. V1-tuned stimuli with distractors, peripheral cuing paradigms, and high perceptual loads seem to be important factors in favor of the 'minority view'. The signal-noise issue for C1, especially between attended and unattended conditions, needs to be considered.
Keywords: Attention; C1; event-related potentials (ERPs).