کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
141466 162881 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Scale-free brain activity: past, present, and future
ترجمه فارسی عنوان
فعالیت مغز آزاد بدون هیچ مقیاس: گذشته، حال و آینده
کلمات کلیدی
فعالیت مغز بدون مقطع، توزیع قدرت قانون، آریتمی، انحراف معیار، پتانسیل میدان مغناطیسی عصبی، دینامیک مغز، نوسانات مغزی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی


• Arrhythmic, scale-free brain activity is distinct from brain oscillations.
• Scale-free brain activity contains rich temporal structures beyond power spectrum.
• Scale-free brain activity is relevant to task performance and arousal state.
• Scale-free brain activity is altered in developmental and disease processes.
• Computational modeling has shed light on the potential generative mechanisms of scale-free brain activity.

Brain activity observed at many spatiotemporal scales exhibits a 1/f-like power spectrum, including neuronal membrane potentials, neural field potentials, noninvasive electroencephalography (EEG), magnetoencephalography (MEG), and functional magnetic resonance imaging (fMRI) signals. A 1/f-like power spectrum is indicative of arrhythmic brain activity that does not contain a predominant temporal scale (hence, ‘scale-free’). This characteristic of scale-free brain activity distinguishes it from brain oscillations. Although scale-free brain activity and brain oscillations coexist, our understanding of the former remains limited. Recent research has shed light on the spatiotemporal organization, functional significance, and potential generative mechanisms of scale-free brain activity, as well as its developmental and clinical relevance. A deeper understanding of this prevalent brain signal should provide new insights into, and analytical tools for, cognitive neuroscience.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 18, Issue 9, September 2014, Pages 480–487
نویسندگان
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