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Clinical lycanthropy

Delusion of being a non-human animal

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Through Syndrome, Animal and Behavior

Signs and symptoms

Affected individuals believe that they are in the process of transforming into an animal, or have already transformed into an animal. Clinical lycanthropy has been associated with the altered states of mind that accompany psychosis, the mental state that typically involves delusions and hallucinations, with the transformation only seeming to happen in the mind and behavior of the affected person.

A 28-year-old murderer who suffered from lycanthropy described his mental disorder in the following way:

When I'm emotionally upset, I feel as if I am turning into something else; my fingers go numb, as if I had pins and needles right in the middle of my hand; I can no longer control myself… I get the feeling I'm becoming a wolf. I look at myself in the mirror and I witness my transformation. It's no longer my face; it changes completely. I stare, my pupils dilate, and I feel as if hairs are growing all over my body, as if my teeth are getting longer… I feel as if my skin is no longer mine.

A 1988 study on clinical lycanthropy from the McLean Hospital reported on a series of cases and proposed some diagnostic criteria by which clinical lycanthropy could be recognised:

  • A patient reports in a moment of lucidity or reminiscence that they sometimes feel like an animal or have felt like one.
  • A patient behaves in a manner that resembles animal behavior, for example, howling, growling, or crawling.

According to these criteria, either a delusional belief in current or past transformation or behavior that suggests a person thinks of themselves as transformed is considered evidence of clinical lycanthropy. The authors note that, although the condition seems to be an expression of psychosis, there is no specific psychiatric or neurological diagnostic entity associated with its behavioral consequences.

Clinical lycanthropy is not specific to an experience of human-to-wolf transformation. A wide variety of creatures have been reported as part of the shape-shifting experience. A 2004 review of the medical literature lists over thirty published cases of clinical lycanthropy, only the minority of which have wolf (lycanthropy) or dog (cynanthropy) themes. Canines are certainly not uncommon, although the experience of being transformed into other animals such as a hyena, cat, horse, bird, or tiger has been reported on more than one occasion.

Transformation into frogs, and even bees, has been reported in some instances. The term ophidianthropy refers to the delusion that one has been transformed into a snake, of which two case studies have been reported.

In Japan, transformation into foxes and dogs was common (Kitsunetsuki, ja:犬神). A 1989 case study described how one individual reported a serial transformation, experiencing a change from human to dog, to a horse, and then to a cat, before returning to the reality of human existence after treatment. There are also reports of people who experienced transformation into an animal, only listed as "unspecified".

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