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Human anterior cingulate cortex neurons modulated by attention-demanding tasks.
K D Davis1, W D Hutchison, A M Lozano
1Departments of Surgery and Physiology, University of Toronto and The Toronto Western Research Institute, Toronto, Ontario M5T 2S8, Canada.
Journal of Neurophysiology
|June 10, 2000
Summary
Researchers found that individual neurons in the human anterior cingulate cortex (ACC) change their activity during attention-demanding tasks. This provides the first direct evidence linking cognitive states to ACC neuronal function.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Electrophysiology
Background:
- The anterior cingulate cortex (ACC) is implicated in cognitive functions like attention through imaging studies.
- Previous research lacked direct evidence of individual ACC neuron activity changes during attention and effortful tasks.
Purpose of the Study:
- To investigate whether individual neurons in the human ACC exhibit altered activity during attention-demanding tasks.
- To provide direct electrophysiological evidence for the role of ACC neurons in cognitive states.
Main Methods:
- Performed single-neuron recordings using microelectrodes in the human ACC.
- Recorded neuronal activity during tasks requiring attention and effortful thought.
Main Results:
- Observed modulation of neuronal activity in 19% of the 36 neurons tested in the human ACC.
- Demonstrated that spontaneous neuronal activity in some ACC neurons is influenced by cognitive state.
Conclusions:
- This study presents the first direct electrophysiological evidence of neuronal modulation in the human ACC during attention-demanding tasks.
- Findings support the hypothesis that specific ACC neurons are involved in cognitive functions requiring attention and effortful thought.