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Athanassios G. Siapas
Researcher at California Institute of Technology
Publications - 29
Citations - 3956
Athanassios G. Siapas is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Receptive field & Hippocampal formation. The author has an hindex of 17, co-authored 28 publications receiving 3556 citations. Previous affiliations of Athanassios G. Siapas include Max Planck Society & Massachusetts Institute of Technology.
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Coordinated Interactions between Hippocampal Ripples and Cortical Spindles during Slow-Wave Sleep
TL;DR: The existence of temporal correlations between hippocampal ripples and cortical spindles that are also reflected in the correlated activity of single neurons within these brain structures are demonstrated and may constitute an important mechanism of cortico-hippocampal communication during sleep.
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Prefrontal Phase Locking to Hippocampal Theta Oscillations
TL;DR: It is demonstrated that a significant portion of neurons in the medial prefrontal cortex of freely behaving rats are phase locked to the hippocampal theta rhythm, and phase locking of prefrontal cells is predicted by the presence of significant correlations with hippocampal cells at positive delays up to 150 ms.
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Hippocampal theta oscillations are travelling waves
TL;DR: The results demonstrate that theta oscillations pattern hippocampal activity not only in time, but also across anatomical space, and the presence of travelling waves indicates that the instantaneous output of the hippocampus is topographically organized and represents a segment of physical space.
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Eye Movements Modulate Visual Receptive Fields of V4 Neurons
Andreas S. Tolias,Tirin Moore,Stelios M. Smirnakis,Edward J. Tehovnik,Athanassios G. Siapas,Peter H. Schiller +5 more
TL;DR: The receptive fields of macaque area V4 neurons during saccadic eye movements are mapped and it is found that receptive fields are remarkably dynamic.
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A local circuit approach to understanding integration of long-range inputs in primary visual cortex.
David C. Somers,Emanuel Todorov,Athanassios G. Siapas,Louis J. Toth,Dae-Shik Kim,Mriganka Sur +5 more
TL;DR: This work supports the notion that receptive field integration is the result of local processing within small groups of neurons rather than in single neurons, and construction of self-contained modules that capture nonlinear local circuit interactions are constructed.