Neural Correlates of the Attentional Blink

نویسندگان

  • René Marois
  • Marvin M. Chun
  • John C. Gore
چکیده

Attending to a visual event can lead to functional blindness for other events in the visual field. This limit in our attentional capacities is exemplified by the attentional blink (AB), which refers to the transient but severe impairment in perceiving the second of two temporally neighboring targets. Using functional magnetic resonance imaging (fMRI), we observed predominantly right intraparietal and frontal cortex activations associated with the AB. We further demonstrate that an AB can be elicited by both temporal and spatial distractor interference on an attended target and that both of these interference mechanisms activate the same neural circuit. These results suggest that a (right) parietofrontal network previously implicated in attentional control and enhancement is also a locus of capacity-limited processing of visual information.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Neural Correlates of Target Detection in the Attentional Blink

.................................................................................................................. 29 3.

متن کامل

Is consciousness a gradual phenomenon? Evidence for an all-or-none bifurcation during the attentional blink.

Several theories of the neural correlates of consciousness assume that there is a continuum of perception, associated with a gradual change in the intensity of brain activation. But some models, considering reverberation of neural activity as necessary for conscious perception, predict a sharp nonlinear transition between unconscious and conscious processing. We asked participants to evaluate t...

متن کامل

Transient Attentional Enhancement during the Attentional Blink: Eeg Correlates of the St Model

There has been considerable recent interest in the identification of neural correlates of the Attentional Blink (AB), and the development of neurally explicit computational models. A prominent example is the Simultaneous Type Serial Token (ST2) model, which suggests that when the visual system detects a task-relevant item, a spatially specific Transient Attentional Enhancement (TAE), called the...

متن کامل

Neural correlates of conscious perception in the attentional blink.

If attending to a target in a rapid stream of visual stimuli within the next 400 ms or so, a second target in the stream is frequently not detected by an observer. This so-called attentional blink can provide a comparison of neural signals elicited by identical stimuli that, in one condition, reach conscious awareness and, in the other, fail to be selected for awareness. In the present study, u...

متن کامل

Neural Correlates of the Attentional Blink and it improves monotonically with increasing lags of

, no previous study has investigated the AB, which emphasizes the capacity-limited Summary nature of attentional processing. In five experiments, we use fMRI to identify the neural activity associated with Attending to a visual event can lead to functional blindness for other events in the visual field. This limit in our the processing limitations that produce the AB deficit. Past psychophysica...

متن کامل

Temporal dynamics of access to consciousness in the attentional blink

Presentation of two targets in close temporal succession often results in an impairment of conscious perception for the second stimulus. Previous studies have identified several electrophysiological correlates for this so-called 'attentional blink'. Components of the event-related potential (ERP) such as the N2 and the P3, but also oscillatory brain signals have been shown to distinguish betwee...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Neuron

دوره 28  شماره 

صفحات  -

تاریخ انتشار 2000