人間とチンパンジーの休息状態の脳活動の比較
A comparison of resting-state brain activity in humans and chimpanzees.
Rilling JK, Barks SK, Parr LA, Preuss TM, Faber TL, Pagnoni G, Bremner JD, Votaw JR.
Proc Natl Acad Sci U S A. 2007 Oct 23;104(43):17146-51. Epub 2007 Oct 16.
In humans, the wakeful resting condition is characterized by a default mode of brain function involving high levels of activity within a functionally connected network of brain regions. This network has recently been implicated in mental self-projection into the past, the future, or another individual's perspective. Here we use [(18)F]-fluorodeoxyglucose positron emission tomography imaging to assess resting-state brain activity in our closest living relative, the chimpanzee, as a potential window onto their mental world and compare these results with those of a human sample. We find that, like humans, chimpanzees show high levels of activity within default mode areas, including medial prefrontal and medial parietal cortex. Chimpanzees differ from our human sample in showing higher levels of activity in ventromedial prefrontal cortex and lower levels of activity in left-sided cortical areas involved in language and conceptual processing in humans. Our results raise the possibility that the resting state of chimpanzees involves emotionally laden episodic memory retrieval and some level of mental self-projection, albeit in the absence of language and conceptual processing.
人間においては覚醒時における休息状態は高次領域のネットワークのデフォルトモードとして特徴付けられている。このネットワークは過去や未来、他者のパースペクティヴへの自己投影に関係していることが示されてきた。
休息状態をヒトとチンパンジーで比較 ([18F]-fluorodeoxyglucose PET)
情動を帯びたエピソード記憶の想起や何らかのレベルの自己投影を行っているが、言語や概念の処理は行われていない？
