Abu Zayd al-Balkhi

Abu Zayd Ahmed ibn Sahl al-Balkhi
Abu Zayd Ahmed ibn Sahl al-Balkhi
Born	850; Shamistiyan, Balkh, Khorasan (modern day northern Afghanistan)
Died	934 (aged 83–84)
Era	Islamic Golden Age
Region	Persian scholar
School	Persian science, Islamic science, Islamic geography, Islamic mathematics, Islamic medicine, Islamic psychological thought
Main interests	Geography, Mathematics, Medicine, Neuroscience, Psychology, Science

Abu Zayd Ahmed ibn Sahl Balkhi (Persian: ابو زید احمد بن سهل بلخی) was a Persian Muslim polymath: a geographer, mathematician, physician, psychologist and scientist. Born in 850 CE in Shamistiyan, in the province of Balkh, Greater Khorasan, he was a disciple of al-Kindi. He also founded the "Balkhī school" of terrestrial mapping in Baghdad.^[1] Al-Balkhi is believed to have been the first to diagnose that mental illness can have psychological and physiological causes and he was the first to typify four types of emotional disorders: fear and anxiety; anger and aggression; sadness and depression; and obsessions.

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[E61-3-1] Cite error: The named reference E61-3 was invoked but never defined (see the help page).

[1]

Abu Zayd Ahmed ibn Sahl al-Balkhi
Born	850 Shamistiyan, Balkh, Khorasan (modern day northern Afghanistan)
Died	934 (aged 83–84)

Era	Islamic Golden Age
Region	Persian scholar
School	Persian science, Islamic science, Islamic geography, Islamic mathematics, Islamic medicine, Islamic psychological thought
Main interests	Geography, Mathematics, Medicine, Neuroscience, Psychology, Science