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Title: Invariant visual representation by single neurons in the human brain
Authors: Quian Quiroga, R.
Reddy, L.
Kreiman, G.
Koch, C.
Fried, I.
First Published: 2005
Citation: Nature, 2005, 435, pp.1102-1107
Abstract: It takes a fraction of a second to recognize a person or an object even when seen under strikingly different conditions. How such a robust, high-level representation is achieved by neurons in the human brain is still unclear1, 2, 3, 4, 5, 6. In monkeys, neurons in the upper stages of the ventral visual pathway respond to complex images such as faces and objects and show some degree of invariance to metric properties such as the stimulus size, position and viewing angle2, 4, 7, 8, 9, 10, 11, 12. We have previously shown that neurons in the human medial temporal lobe (MTL) fire selectively to images of faces, animals, objects or scenes13, 14. Here we report on a remarkable subset of MTL neurons that are selectively activated by strikingly different pictures of given individuals, landmarks or objects and in some cases even by letter strings with their names. These results suggest an invariant, sparse and explicit code, which might be important in the transformation of complex visual percepts into long-term and more abstract memories.
DOI Link: 10.1038/nature03687
ISSN: 0028-0836
Type: Article
Appears in Collections:Published Articles, Dept. of Engineering

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