Neural dynamics of the attentional blink revealed by encoding orientation selectivity during rapid visual presentation

• Published in: Nature communications Vol. 11; no. 1; p. 434
• Main Authors: Tang, Matthew F., Ford, Lucy, Arabzadeh, Ehsan, Enns, James T., Visser, Troy A. W., Mattingley, Jason B.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 23-01-2020; Nature Publishing Group; Nature Portfolio
• Subjects: 631/378/2649/1310; 631/378/3917; 631/477/2811; 9/26; Adult; Attentional Blink - physiology; Brain; Brain - physiology; Brain research; Design; Electroencephalography; Feature extraction; Female; Humanities and Social Sciences; Humans; Information processing; Male; Medical imaging; Models, Neurological; multidisciplinary; Neuroimaging; Neurosciences; Nontherapeutic Human Experimentation; Orientation; Orientation behavior; Photic Stimulation; Psychology; Regression analysis; Representations; Science; Science (multidisciplinary); Selectivity; Visual Perception; Young Adult
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-019-14107-z

The human brain is inherently limited in the information it can make consciously accessible. When people monitor a rapid stream of visual items for two targets, they typically fail to see the second target if it occurs within 200–500 ms of the first, a phenomenon called the attentional blink (AB). The neural basis for the AB is poorly understood, partly because conventional neuroimaging techniques cannot resolve visual events displayed close together in time. Here we introduce an approach that characterises the precise effect of the AB on behaviour and neural activity. We employ multivariate encoding analyses to extract feature-selective information carried by randomly-oriented gratings. We show that feature selectivity is enhanced for correctly reported targets and suppressed when the same items are missed, whereas irrelevant distractor items are unaffected. The findings suggest that the AB involves both short- and long-range neural interactions between visual representations competing for access to consciousness.
People often fail to perceive the second of two brief visual targets, a phenomenon known as the attentional blink (AB). Here the authors modelled behaviour and brain activity to show that the AB arises from short- and long-range interactions between representations of elementary visual features.