"Ibn Sina", more commonly known in west as Avicenna was a Persian polymath and physician of the tenth and eleventh centuries. He was known for his scientific works, but especially his writing on medicine. He has been described as the "Father of Early Modern Medicine". Ibn Sina is credited with many varied medical observations and discoveries, such as recognizing the potential of airborne transmission of disease, providing insight into many psychiatric conditions, recommending use of forceps in deliveries complicated by fetal distress, distinguishing central from peripheral facial paralysis and describing guinea worm infection and trigeminal neuralgia. He is credited for writing two books in particular: his most famous, "al-Canon fi al Tibb" ("The Canon of Medicine"), and also "The Book of Healing". His other works cover subjects including angelology, heart medicines, and treatment of kidney diseases.