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This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

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Observations placeholder

Herpes and hallucinations



Type of Spiritual Experience


Number of hallucinations: 16


A description of the experience

Pediatr Neurol. 2010 Jan;42(1):32-9. doi: 10.1016/j.pediatrneurol.2009.07.014. Clinical and imaging findings suggesting human herpesvirus 6 encephalitis.Provenzale JM, van Landingham K, White LE. Department of Radiology, Duke University Medical Center, Durham, North Carolina 27710, USA. prove001@mc.duke.edu

We sought to distinguish patients testing positive for human herpesvirus 6 from those testing negative, based on clinical features and magnetic resonance images.

Sixteen immunosuppressed patients were tested by polymerase chain reaction for human herpes virus 6 DNA in cerebrospinal fluid (nine positive results). Medical records were examined for agitation, altered mental status, hallucinations, insomnia, memory loss, and seizures. Patients were sorted by viral status. Clinical features were compared with imaging findings.

Insomnia, agitation, and hallucinations were preferentially evident in human herpes virus 6-positive patients. Imaging abnormalities were evident in the hippocampus of both groups. However, extrahippocampal involvement was more common in human herpes virus 6-positive patients and among those with insomnia and hallucinations or seizures. Patients with memory loss and imaging abnormalities in the entorhinal cortex or amygdala were likely to test positive, as were patients with hallucinations and abnormal magnetic resonance signal in the hippocampus.

Human herpes virus 6 encephalitis patients present with diverse clinical features that are also common among patients who test negative. This entity should be suspected in patients who present with insomnia, seizures, or hallucinations when imaging abnormalities are evident in the hippocampus, amygdala, and limbic structures beyond the medial temporal lobe.

PMID: 20004860

The source of the experience


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Science Items

Activities and commonsteps