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The publisher's final edited version of this article is available at Neuron See other articles in PMC that cite the published article. It has become increasingly clear, however, that dopamine neurons also transmit signals related to salient but non-rewarding experiences such as aversive and alerting events. Here we review recent advances in understanding the reward and non-reward functions of dopamine. Based on this data, we propose that dopamine neurons come in multiple types that are connected with distinct brain networks and have distinct roles in motivational control. Some dopamine neurons encode motivational value, supporting brain networks for seeking, evaluation, and value learning.
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Chinese 'gait recognition' tech IDs people by how they walk | CTV News

Already used by police on the streets of Beijing and Shanghai, "gait recognition" is part of a push across China to develop artificial-intelligence and data-driven surveillance that is raising concern about how far the technology will go. Huang Yongzhen, the CEO of Watrix, said that its system can identify people from up to 50 metres feet away, even with their back turned or face covered. This can fill a gap in facial recognition, which needs close-up, high-resolution images of a person's face to work. Chinese police are using facial recognition to identify people in crowds and nab jaywalkers, and are developing an integrated national system of surveillance camera data. Not everyone is comfortable with gait recognition's use.
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Chinese 'gait recognition' tech IDs people by how they walk

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