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エルゼビア / NSR協賛シンポジウム:体性感覚:生体警告、運動制御、発達、自己意識のための基本感覚システム
Elsevier - NSR Sponsored Symposium:Somatosensory; Fundamental sensory system for bodily alert, motor control, development, and self-consciousness

開催日 2014/9/11
時間 14:00 - 16:00
会場 Room C(502)
Chairperson(s) 村田 哲 / Akira Murata (近畿大学医学部生理学 / Department of Physiology, Kinki University Faculty of Medicine, Japan)
内藤 栄一 / Eiichi Naito (独立行政法人 情報通信研究機構 脳情報通信融合研究センター / Center for Information and Neural Networks (CiNet), National Institute of Information and Communication Technology, Japan)

The topography of learning mechanisms for pain and temperature.
The topography of learning mechanisms for pain and temperature

  • S1-C-2-1
  • Ben Seymour:1 
  • 1:Center for Information and Neural Networks, Japan 

Pain and temperature have a special role in the sense of bodily alert and consciousness, as they report information that has direct survival value. That is, since this information pertains to our physiological integrity, or threat to the integrity, their signals have evolutionarily acquired inherent value. How such information is used to guide general learning and decision-making as homeostatic signals, is well studied. However, we know much less about how pain and temperature learning reflect the topography of the body. Here, I will describe two combined behavioural and neuroimaging (fMRI) studies that show how different types of learning are anatomically specific. The first is in Pavlovian pain learning, where I will show evidence that a cerebellar system learns limb-specific conditioned responses. Importantly, this appears to be distinct from the well-known amygdala-dependent aversive learning system, which ignores anatomical specificity, and shows that multiple learning mechanisms underlie aversive conditioning. Second, in a perceptual learning paradigm, we show that experience-dependent improvements in temperature discrimination appear to be anatomically (laterality) specific. However, the brain laterality of this system is much less clear. Together, these findings show that both perceptual and motivational learning in the pain and temperature system incorporate mechanisms that retain basic anatomical specificity.

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