海馬體

海馬體（粵拼：hoi2 maa5 tai2；英文：hippocampus）係個腦嘅邊緣系統（limbic system）嘅一個重要部份，背側（dorsal）嘅部份同多種記憶功能好有拏褦。

功能

海馬體前部（anterior）嘅一個重要功能係處理趨近定遠離衝突（approach-avoidance conflict）－趨近定遠離衝突係一種情況，指隻動物感知到一個刺激，個刺激可以係犒賞、但又有可能係行為懲罰，例如佢離遠見到隻動物，隻動物有可能係同伴（犒賞）又有可能係獵食者（行為懲罰），搞到隻動物想趨近隻動物但同時又想遠離佢^[1]；如果海馬體前部受到啟動，隻動物一般會進入慎重趨近（cautious approach）狀態，即係話佢會作出趨近，但同時將注意力變成集中於留意周圍有冇危險，以便一旦真係有危險就可以即刻發覺同進入戰鬥定逃走（fight-or-flight）狀態^[2]^[3]。

睇埋

攷

↑ O'Neil, E. B., Newsome, R. N., Li, I. H., Thavabalasingam, S., Ito, R., & Lee, A. C. (2015). Examining the role of the human hippocampus in approach-avoidance decision making using a novel conflict paradigm and multivariate functional magnetic resonance imaging (PDF). Journal of Neuroscience, 35(45), 15039-15049.
↑ Kelly, D. (1982). The Neuropsychology of Anxiety: An Enquiry into the Functions of the Septo-Hippocampel System. By Jeffrey A. Gray Oxford University Press. 1982. Pp 548.£ 27.50. The British Journal of Psychiatry, 141(6), 634-634.
↑ McNaughton, N., & Corr, P. J. (2008). The neuropsychology of fear and anxiety: A foundation for Reinforcement Sensitivity Theory (PDF).

呢篇解剖學文係楔位文。歡迎幫維基百科擴寫佢。

[1] O'Neil, E. B., Newsome, R. N., Li, I. H., Thavabalasingam, S., Ito, R., & Lee, A. C. (2015). Examining the role of the human hippocampus in approach-avoidance decision making using a novel conflict paradigm and multivariate functional magnetic resonance imaging (PDF). Journal of Neuroscience, 35(45), 15039-15049.

[2] Kelly, D. (1982). The Neuropsychology of Anxiety: An Enquiry into the Functions of the Septo-Hippocampel System. By Jeffrey A. Gray Oxford University Press. 1982. Pp 548.£ 27.50. The British Journal of Psychiatry, 141(6), 634-634.

[3] McNaughton, N., & Corr, P. J. (2008). The neuropsychology of fear and anxiety: A foundation for Reinforcement Sensitivity Theory (PDF).

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