Lewis Carroll
Migraine and epilepsy

In his diary from 1880, Dodgson recorded experiencing his first episode of migraine with aura, describing very accurately the process of "moving fortifications" that are a manifestation of the aura stage of the syndrome. There is no clear evidence to show whether this was his first experience of migraine per se or he previously had the far more common form of migraine without aura, although the latter seems most likely, given the fact that migraine most commonly develops in the teens or early adulthood. Another form of migraine aura called Alice in Wonderland syndrome has been named after Dodgson's book of the same name and its titular character, because its manifestation can resemble the sudden size-changes in the book. It is also known as micropsia and macropsia, a brain condition affecting the way that objects are perceived by the mind. For example, an affected person may look at a larger object such as a basketball and perceive it as having the size of a golf ball. Some authors have suggested that Dodgson experienced this type of aura and used it as an inspiration in his work, but there is no evidence that he did.

Dodgson also had two attacks in which he lost consciousness. He was diagnosed by a Dr Morshead, Dr Brooks, and Dr Stedman, and they believed the attack and a consequent attack to be an "epileptiform" seizure (initially thought to be fainting, but Brooks changed his mind). Some have concluded from this that he had this condition for his entire life, but there is no evidence of this in his diaries beyond the diagnosis of the two attacks already mentioned. Some authors, Sadi Ranson in particular, have suggested that Carroll had temporal lobe epilepsy in which consciousness is not always completely lost but altered, and in which the symptoms mimic many of the same experiences as Alice in Wonderland. Carroll had at least one incident in which he suffered full loss of consciousness and awoke with a bloody nose, which he recorded in his diary and noted that the episode left him not feeling himself for "quite sometime afterward". This attack was diagnosed as possibly "epileptiform", and Carroll himself later wrote of his "seizures" in the same diary.

Most of the standard diagnostic tests of today were not available in the nineteenth century. Yvonne Hart, consultant neurologist at the John Radcliffe Hospital, Oxford, considered Dodgson's symptoms. Her conclusion, quoted in Jenny Woolf's 2010 The Mystery of Lewis Carroll, is that Dodgson very likely had migraine and may have had epilepsy, but she emphasises that she would have considerable doubt about making a diagnosis of epilepsy without further information.
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