Muhammad ibn Yusuf al-Ilaqi

Muhammad ibn Yusuf al-Ilaqi was an eleventh century physician from Khorasan, in the region of Bakharz and most probably active in Balkh in present day Afghanistan. Scholarship summarised in his article corrects an older belief that he lived in the twelfth century and died in 1141; he most probably died around 1068 and is counted among the direct students of Avicenna. He produced a greatly abbreviated epitome of the first book of Avicenna Canon of Medicine, known as the Aphorisms of al-Ilaqi and also as the Book of Causes and Symptoms. The epitome was very popular and many copies have survived.