放射性同位元素は，ヒト脳機能の成り立ちを解明する上で大きな役割を果たした。生きているヒトの脳がどのように形成され機能しているのか，陽電子断層法（PET）や単光子放射断層法（SPECT）によって画像化され，ヒト脳の成熟，機能分化，機能局在と多機能性など，基本的な仕組みの一端が解明された。現在の疑問のひとつは，ヒト脳機能に及ぼす遺伝子の影響である。顔形が親に似るように，脳の機能は受け継いだ遺伝情報に支配されているのだろうか？
Radioisotopes have played a major role in elucidating the origins of human brain function. Positron emission tomography (PET) and single-photon emission computed tomography (SPECT) have been used to visualize how the living human brain is formed and functions, elucidating some of the basic mechanisms of human brain maturation, functional differentiation, functional localization, and multifunctionality. One of the current questions is the influence of genes on human brain function. Is brain function controlled by inherited genetic information, just as our facial shape resembles our parents?
Key words: positron emission tomography; single photon emission computed tomography; brain function; brain maturation
© Japan Radioisotope Association 2026. This is an open access article distributed under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License (https://creativecommons.org/licenses/by-nc/4.0/)© Japan Radioisotope Association 2026. This is an open access article distributed under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License (https://creativecommons.org/licenses/by-nc/4.0/)
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