Samuel A. Nastase

Learn More
Coding for the degree of disorder in a temporally unfolding sensory input allows for optimized encoding of these inputs via information compression and predictive processing. Prior neuroimaging work has examined sensitivity to statistical regularities within single sensory modalities and has associated this function with the hippocampus, anterior cingulate,(More)
Complex systems are described according to two central dimensions: (a) the randomness of their output, quantified via entropy; and (b) their complexity, which reflects the organization of a system's generators. Whereas some approaches hold that complexity can be reduced to uncertainty or entropy, an axiom of complexity science is that signals with very high(More)
Multivariate cross-classification is a powerful tool for decoding abstract or supramodal representations from distributed neural populations. However, this approach introduces several methodological challenges not encountered in typical multivariate pattern analysis and information-based brain mapping. In the current report, we review these challenges,(More)
UNLABELLED Common or folk knowledge about animals is dominated by three dimensions: (1) level of cognitive complexity or "animacy;" (2) dangerousness or "predacity;" and (3) size. We investigated the neural basis of the perceived dangerousness or aggressiveness of animals, which we refer to more generally as "perception of threat." Using functional magnetic(More)
Humans prioritize different semantic qualities of a complex stimulus depending on their behavioral goals. These semantic features are encoded in distributed neural populations, yet it is unclear how attention might operate across these distributed representations. To address this, we presented participants with naturalistic video clips of animals behaving(More)
3.09.1 What Is Semantic Memory? 133 3.09.2 Gross Functional Anatomy 134 3.09.2.1 The Medial Temporal Lobe 134 3.09.2.2 The Neocortex 134 3.09.3 Deficits in Semantic Memory 135 3.09.3.1 Category-Specific Semantic Deficits 135 3.09.3.2 Neuroanatomy of Semantic Deficits 136 3.09.4 Localizing Semantic Knowledge 136 3.09.4.1 Cortical Basis of Modality-Specific(More)
  • 1