Journal
PLOS BIOLOGY
Volume 19, Issue 12, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pbio.3001466
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Funding
- National Natural Science Foundation of China [32171033, 32100831]
- Fundamental Research Funds for the Central Universities
- The 111 Project Grant [BP0719032]
- The Open Research Fund of the State Key Laboratory of Cognitive Neuroscience and Learning
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The study found 3 narrowband gamma rhythms in the primary visual cortex (V1) that processed distinct spatial frequency signals and had different neural origins. These gamma rhythms showed better performance in discriminating the edge and surface of simple objects, reflecting the neural dynamics of processing different SF information in the visual system.
Gamma rhythms in many brain regions, including the primary visual cortex (V1), are thought to play a role in information processing. Here, we report a surprising finding of 3 narrowband gamma rhythms in V1 that processed distinct spatial frequency (SF) signals and had different neural origins. The low gamma (LG; 25 to 40 Hz) rhythm was generated at the V1 superficial layer and preferred a higher SF compared with spike activity, whereas both the medium gamma (MG; 40 to 65 Hz), generated at the cortical level, and the high gamma HG; (65 to 85 Hz), originated precortically, preferred lower SF information. Furthermore, compared with the rates of spike activity, the powers of the 3 gammas had better performance in discriminating the edge and surface of simple objects. These findings suggest that gamma rhythms reflect the neural dynamics of neural circuitries that process different SF information in the visual system, which may be crucial for multiplexing SF information and synchronizing different features of an object.
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