Between the ninth and twelfth centuries, physicians working across the Islamic world inherited, translated, criticised and extended earlier Greek, Persian and other medical traditions. Epilepsy was part of that medical literature. It was discussed as a disorder with causes, symptoms, prognosis and treatment rather than only as a supernatural affliction.
Two names stand out in the surviving literature: Abū Bakr Muhammad ibn Zakariyyā al-Rāzī, known in Latin Europe as Rhazes, and Ibn Sīnā, known as Avicenna. Their writings became influential far beyond the regions in which they worked and later entered Latin medical education in medieval Europe.
This was not modern neurology. Their explanations relied on humoral physiology and theories that are no longer accepted. Their importance is historical: they preserved earlier knowledge, added clinical observation, organised it systematically and helped make epilepsy part of learned medicine across a vast intellectual network.
What does ‘medieval Islamic medicine’ mean?
The phrase refers to medical scholarship produced in societies governed by Islamic polities and written mainly in Arabic, but also by authors of varied ethnic, linguistic and religious backgrounds. Persian, Arab, Christian, Jewish and other scholars all contributed to this medical culture.
Arabic became a major scholarly language. Texts by Hippocrates, Galen and other Greek authors were translated, studied and incorporated into new medical works. This was not simple copying. Physicians compared authorities, recorded cases, organised knowledge and developed their own interpretations.
For epilepsy, this meant that older cerebral and humoral explanations were preserved while being placed within broader clinical systems.
The translation movement and the survival of medical knowledge
From the eighth and especially the ninth century onward, major translation activity brought Greek scientific and medical texts into Arabic. This process helped preserve works that might otherwise have been less accessible and made them available to new generations of scholars.
Hippocratic and Galenic medicine had a particularly strong influence. Yet Islamic-era physicians did not treat classical authorities as untouchable. Al-Rāzī, for example, became known for combining textual learning with clinical observation and for disagreeing with earlier writers when experience seemed to contradict them.
al-Razi: physician, observer and critic
Al-Rāzī was born near Rayy, close to modern Tehran, around the mid-ninth century and died in the early tenth century. He wrote extensively on medicine, philosophy and science, and his medical works later circulated in Latin translation.
His major compilation, Kitāb al-Hāwī, known in Latin as the Liber Continens, assembled observations from earlier authorities together with his own clinical comments. Modern historical scholarship has highlighted his willingness to use bedside observation and neuroanatomical reasoning rather than rely entirely on inherited doctrine.
In the history of epilepsy, al-Rāzī belongs to a tradition that treated convulsive disorders as medical problems involving the brain and body. The surviving evidence is less famous in popular accounts than Avicenna’s, but his broader neurological writings show a strong interest in localisation, nerve function and clinical differentiation.
Clinical observation mattered
One of the most important features of medieval Persian and Arabic medical literature is the amount of descriptive detail. Historical reviews of medieval Iranian medicine note discussion of the manifestations, causes, prognosis and treatment of epilepsy, including different apparent forms of the disorder and attention to age, bodily state and precipitating conditions.
This does not mean the classifications correspond directly to modern seizure types. The categories were built within humoral medicine, not EEG-based neurology. But the habit of distinguishing one presentation from another was clinically significant.
Avicenna and the Canon of Medicine
Ibn Sīnā, usually called Avicenna in Latin sources, was born in 980 and died in 1037. His Al-Qānūn fī al-Tibb, the Canon of Medicine, became one of the most influential medical textbooks of the medieval and early modern world.
The Canon organised medical knowledge into a systematic framework. Its treatment of epilepsy discussed causes, symptoms, prognosis and remedies, and it became part of a much larger account of diseases affecting the brain and nervous system. Historical scholarship describes Avicenna as synthesising Greek, Roman and Islamic medical traditions while systematising epilepsy within a broader diagnostic structure.
How Avicenna classified causes
Avicenna’s framework distinguished epilepsy arising primarily from disease of the brain from seizure disorders attributed to disturbance elsewhere in the body that then affected the brain.
Later historical studies of his writings describe examples involving the stomach, spleen, uterus and abdominal structures. These ideas reflected the medical theory of his time, in which distant organs could influence the brain through humours, vapours or bodily connections.
These categories should not be reinterpreted as modern concepts such as autoimmune epilepsy, reflex epilepsy or gut-brain signalling. Their historical value lies in showing how systematically medieval physicians tried to organise causation.
Idiopathic and symptomatic ideas
Modern historical writing often describes Avicenna as distinguishing forms of epilepsy with no obvious external cause from forms secondary to other bodily disease. This resembles later distinctions between primary and symptomatic disorders, but the resemblance should not be overstated.
His categories belonged to a humoral model, not modern aetiological classification. Even so, the effort to separate a disorder arising in the brain from one linked to another disease shows a clinically structured way of thinking.
Children and adults were not treated as identical
Avicenna recognised age-related differences in epilepsy. Historical summaries note that he distinguished aspects of childhood and adult epilepsy and paid attention to prognosis at different ages.
This continued an older medical tradition in which age and bodily development were thought to alter disease course. The explanations were humoral, but the underlying clinical observation — that epilepsy does not behave identically across the lifespan — was important.
Triggers and provoking factors in medieval texts
Some historical reviews attribute to Avicenna observations that intense sensory stimulation, disturbed sleep and other environmental or bodily factors could precipitate attacks in susceptible people.
These reports are interesting because they show attention to circumstances surrounding seizures. They should not be rewritten as if Avicenna had already formulated modern concepts such as photosensitive epilepsy or sleep-deprivation thresholds. The observations were empirical and embedded in very different medical theory.
Treatment was broad and highly individualised
Avicenna’s treatment recommendations for epilepsy included diet, regimen, herbal medicines, purgatives and other interventions aimed at correcting the bodily imbalance believed to underlie the disorder. Later reviews have catalogued many of these remedies.
Some historical remedies have since been tested experimentally, but this does not validate the overall medieval treatment system. The vast majority were not evaluated through controlled clinical trials, and some would be ineffective or unsafe by modern standards.
Historically, the important point is that epilepsy was treated within a medical system involving diagnosis, prognosis, diet and pharmacology rather than only prayer or exorcism.
Herbal medicine and pharmacology
Medieval Islamic medicine inherited a large materia medica from Greek, Persian, Indian and local traditions. Physicians prescribed plant, mineral and animal-derived substances in carefully described preparations.
In Avicenna’s epilepsy writings, numerous botanical remedies appear. Modern authors have examined some of these substances for possible anticonvulsant effects, but the evidence is fragmentary and should not be used to revive historical prescriptions as treatment advice.
For the history of medicine, these prescriptions show how epilepsy was incorporated into a pharmacological tradition centuries before modern antiseizure drugs.
Religion and medicine coexisted
As in Christian Europe, learned medicine did not exist in a vacuum. Islamic societies included religious healing, prayer, devotional practices and popular beliefs alongside scholarly medicine.
It would therefore be misleading to portray the Islamic world as entirely rational and secular while medieval Europe was entirely supernatural. Both regions contained multiple explanatory traditions.
What distinguishes the major medical authors is not the absence of religion from society, but the existence of sophisticated medical literature in which epilepsy was analysed within naturalistic physiological systems.
Hospitals and organised medical practice
Urban centres across the Islamic world developed hospitals, often called bimaristans, which provided institutional medical care and training. Their organisation varied by place and period.
Physicians such as al-Rāzī were associated with hospital medicine, and the growth of such institutions helped support clinical observation and professional medical practice.
We should not imagine a modern neurology ward, but the hospital environment mattered because it placed recurrent disorders such as epilepsy within organised medicine rather than leaving them solely to household or religious care.
The role of case writing
Al-Rāzī’s medical works are especially valuable because they include case material and comments based on experience. Historians of neurology have noted examples in which he used the pattern of weakness or sensory loss to infer the location of injury within the nervous system.
This broader neurological habit is relevant to epilepsy history. It shows a medical culture increasingly interested in matching symptoms with bodily anatomy and clinical course.
Avicenna’s ‘uterine epilepsy’
One historically striking example is Avicenna’s discussion of epilepsy associated with the uterus. He believed that disorders of the uterus, including retention of menstrual blood or other bodily material, could influence the brain and provoke seizures.
This theory is not accepted today. Its value is historical because it shows how medieval medicine tried to explain sex-specific patterns of illness through the physiology available at the time.
It also demonstrates that women with seizures were not treated as a completely separate supernatural category. Their symptoms were incorporated into a medical theory of organs, humours and bodily interaction.
The abdominal or ‘maraqq’ theory
Avicenna also described forms of epilepsy associated with abdominal structures, including the maraqq, a term later interpreted in historical literature as referring to a membranous structure in the abdomen.
This is another example of a theory that is historically interesting but scientifically obsolete. It shows that physicians sought explanations for seizure disorders beyond a single undifferentiated diagnosis, even when the mechanisms they proposed were wrong.
Transmission to Latin Europe
One of the most important consequences of medieval Islamic medicine was the later translation of Arabic medical literature into Latin.
From the twelfth century onward, works by Avicenna, al-Rāzī and other authors entered European universities. The Canon of Medicine became a major teaching text, while al-Rāzī’s works were also widely read.
Avicenna’s medical poem, translated into Latin by Gerard of Cremona, circulated alongside the Canon and formed part of medical education in centres such as Salerno, Montpellier, Bologna and Paris.
This means that the history of epilepsy in medieval Europe cannot be divided neatly into separate ‘European’ and ‘Islamic’ stories. Knowledge crossed linguistic, religious and geographic boundaries.
Why the Canon became so influential
The Canon was successful because it organised a huge body of medical knowledge into a structured system that could be taught.
For students, this mattered as much as originality. A comprehensive textbook that arranged symptoms, causes, prognosis and treatment into an ordered framework was extremely useful in formal medical education.
Its influence lasted for centuries in both the Islamic world and Europe.
Were these physicians ‘modern’ before their time?
It is tempting to celebrate al-Rāzī and Avicenna by claiming they had already discovered modern neurology. That creates a different distortion.
Their physiology was still humoral. Their treatments included remedies that would not meet modern standards. Their categories do not correspond exactly to today’s epilepsy classifications.
Their historical importance does not depend on turning them into modern neurologists. It lies in their clinical organisation, observation, scholarship and transmission of medical knowledge.
What medieval Islamic medicine contributed to epilepsy history
Its contribution can be understood in several layers.
First, it preserved and translated earlier Greek medical thought.
Second, physicians such as al-Rāzī and Avicenna integrated that inheritance into broader medical systems rather than merely copying it.
Third, epilepsy was described in terms of symptoms, causes, age, prognosis and treatment.
Fourth, this medical literature later moved into Latin Europe and shaped university medicine for centuries.
Why this chapter matters
Popular timelines of epilepsy often jump from Hippocrates directly to Renaissance or nineteenth-century Europe. That leaves out centuries of medical scholarship in Persian and Arabic-speaking centres.
Filling that gap changes the story.
Epilepsy knowledge did not simply disappear after classical antiquity and then reappear in Europe. It was translated, debated, reorganised and taught across the medieval Islamic world before many of those texts entered Latin medicine.
That is one of the most important reasons al-Rāzī and Avicenna belong in a serious history of epilepsy.
Sources and further reading
Gorji A, Khaleghi Ghadiri M. History of epilepsy in Medieval Iranian medicine. Neuroscience & Biobehavioral Reviews. 2001.
Ibn Sina’s contributions to epilepsy management: Innovations from the Islamic Golden Age. Historical review. 2025.
Old Remedies for Epilepsy: Avicenna’s Medicine. Iranian Red Crescent Medical Journal. 2012.
Richter-Bernburg L. Abū Bakr Muhammad al-Rāzī’s medical works. Historical review.
Insights into neurologic localization by Rhazes, a medieval Islamic physician. Neurology. 2005.
Uterine epilepsy: a historical report from Avicenna’s point of view. Neurological Sciences. 2019.
Peritoneum as an origin of epilepsy from the viewpoint of Avicenna. Neurological Sciences. 2018.
The role of Ibn Sina’s Medical Poem in the transmission of medical knowledge to medieval Europe. 2014.
Medicine in classical Islamic culture and its transfer to Europe. Historical review.
Historical evidence checked: September 2026.