Interactions of bottom – up and top – down processes in human evoked gamma – band activity
نویسنده
چکیده
منابع مشابه
Top-Down Beta Enhances Bottom-Up Gamma
Several recent studies have demonstrated that the bottom-up signaling of a visual stimulus is subserved by interareal gamma-band synchronization, whereas top-down influences are mediated by alpha-beta band synchronization. These processes may implement top-down control of stimulus processing if top-down and bottom-up mediating rhythms are coupled via cross-frequency interaction. To test this po...
متن کاملEvent-Related Potentials of Bottom-Up and Top-Down Processing of Emotional Faces
Introduction: Emotional stimulus is processed automatically in a bottom-up way or can be processed voluntarily in a top-down way. Imaging studies have indicated that bottom-up and top-down processing are mediated through different neural systems. However, temporal differentiation of top-down versus bottom-up processing of facial emotional expressions has remained to be clarified. The present st...
متن کاملTop-down attentional processing enhances auditory evoked gamma band activity.
In contrast to animal studies, relatively little is known about the functional significance of the early evoked gamma band activity in humans. We investigated whether evoked and induced 40 Hz activity differentiate automatic, bottom-up aspects of attention from voluntary, top-down related attentional demands. An auditory novelty-oddball task was applied to 14 healthy subjects. As predicted, mor...
متن کاملEffect of Metacognitive Strategy Training and Perfectionism on Listening Comprehension Sub-Processes
The present study aimed to examine any possible relevance of perfectionism as a personal trait variable, in moderating the effectiveness of meta-cognitive instruction on bottom-up and top-down sub-processes of listening comprehension with a sample of EFL learners in Iranian context. To this end, 94 female EFL learners were selected from among 136 EFL learners at Andisheh Language Institute in M...
متن کاملOscillatory gamma band and slow brain activity evoked by real and imagery musical stimuli
There is growing evidence that oscillatory brain activity is involved in Gestalt recognition processes. However, it is still a question at issue whether this activity is correlated to high-level cognitive top-down processes or to perceptual bottom-up processes [1]. In contrast imaginary events are supposed to be pure top-down processes, which makes them a possibility to differenciate between bo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005