Short-term plasticity as a neural mechanism supporting memory and attentional functions

被引:52
作者
Jaaskelainen, Iiro P. [1 ]
Ahveninen, Jyrki [2 ]
Andermann, Mark L. [3 ]
Belliveau, John W. [2 ]
Raij, Tommi [2 ]
Sams, Mikko [1 ]
机构
[1] Aalto Univ, Sch Sci, Dept Biomed Engn & Computat Sci, Brain & Mind Lab, Espoo, Finland
[2] MGH HMS MIT Athinoula A Martinos Ctr Biomed Imagi, Charlestown, MA USA
[3] Harvard Univ, Sch Med, Dept Neurobiol, Boston, MA 02115 USA
基金
芬兰科学院; 美国国家卫生研究院;
关键词
Short-term plasticity; Sensory memory; Short-term memory; Involuntary attention; Selective attention; Perceptual learning; HUMAN AUDITORY-CORTEX; SPECTROTEMPORAL RECEPTIVE-FIELDS; THALAMIC RETICULAR NUCLEUS; MISMATCH NEGATIVITY MMN; SELECTIVE ATTENTION; SYNAPTIC DEPRESSION; SOMATOSENSORY CORTEX; DEPENDENT PLASTICITY; NORMALIZATION MODEL; SPATIAL GRADIENTS;
D O I
10.1016/j.brainres.2011.09.031
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Based on behavioral studies, several relatively distinct perceptual and cognitive functions have been defined in cognitive psychology such as sensory memory, short-term memory, and selective attention. Here, we review evidence suggesting that some of these functions may be supported by shared underlying neuronal mechanisms. Specifically, we present, based on an integrative review of the literature, a hypothetical model wherein short-term plasticity, in the form of transient center-excitatory and surround-inhibitory modulations, constitutes a generic processing principle that supports sensory memory, short-term memory, involuntary attention, selective attention, and perceptual learning. In our model, the size and complexity of receptive fields/level of abstraction of neural representations, as well as the length of temporal receptive windows, increases as one steps up the cortical hierarchy. Consequently, the type of input (bottom-up vs. top down) and the level of cortical hierarchy that the inputs target, determine whether short-term plasticity supports purely sensory us. semantic short-term memory or attentional functions. Furthermore, we suggest that rather than discrete memory systems, there are continuums of memory representations from short-lived sensory ones to more abstract longer-duration representations, such as those tapped by behavioral studies of short-term memory. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:66 / 81
页数:16
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