Al-Kashkari (Arabic: الكسكري; 322 in AH/c. 934 CE in Kashkar – 414 AH/1023 CE in Fushanj) was a hospital physician from Baghdad. In diagnosing mental disorder, al-Kashkari used criteria such the temperament of the patient as indicators to ascertain the nature of the mental disorder: sluggishness and forgetfulness point to a cold temperament, which requires a different treatment from a warm one, which is revealed through insomnia.
References
Further reading Pormann, Peter E (2003). "Theory and Practice in the Early Hospitals in Baghdad — Al-Kaškarī On Rabies and Melancholy". Zeitschrift für Geschichte der Arabisch-Islamischen Wissenschaften. 15: 197–248.