Measuring sparseness in the brain: comment on Bowers (2009).

Measuring sparseness in the brain: comment on Bowers (2009).
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DOI:
10.1037/a0016917
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发表时间:
2010-01
影响因子:
5.4
通讯作者:
Kreiman, Gabriel
Kreiman, Gabriel
中科院分区:
心理学1区
文献类型:
--
作者:
Quiroga, Rodrigo Quian;Kreiman, Gabriel

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挑战了支持心理建模中分布式表示的普遍观点以及反对局部主义和祖母细胞编码方案的主要论点。他重新审视了几项单细胞研究的结果,认为它们不支持分布式表示。我们赞扬鲍尔斯将心理模型和神经生理学记录的证据结合起来的贡献,但不同意他的一些主张。在这篇评论中,我们认为分布式、本地主义和祖母细胞编码之间的区别对于真实数据来说可能会带来麻烦。此外,这些区别似乎位于同一连续体中,我们认为使用稀疏性度量来表征编码方案可能是明智的。我们进一步认为,可能没有一个独特的编码方案在所有大脑区域和所有可能的功能中实施。特别是,目前的证据表明,大脑可能在初级感觉区域使用分布式代码,在高级感觉区域使用稀疏且不变的表示。
challenged the common view in favor of distributed representations in psychological modeling and the main arguments given against localist and grandmother cell coding schemes. He revisited the results of several single-cell studies arguing that they do not support distributed representations. We praise the contribution of Bowers for joining evidence from psychological modeling and neurophysiological recordings, but disagree with several of his claims. In this comment we argue that distinctions between distributed, localist and grandmother cell coding can be troublesome with real data. Moreover, these distinctions seem to be lying within the same continuum, and we argue that it may be sensible to characterize coding schemes using a sparseness measure. We further argue that there may not be a unique coding scheme implemented in all brain areas and for all possible functions. In particular, current evidence suggests that the brain may use distributed codes in primary sensory areas and sparser and invariant representations in higher areas.
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