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Behavior - unusual or strange Health Article

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Definition

Unusual or strange behavior involves performing actions that are not normal for the person.

Alternative Names

Acting strangely

Considerations

Unusual or strange behavior may include:

  • Loss of memory that continues over time or gets worse
  • Loss of the ability to concentrate and perform other mental tasks

Common Causes

There are many causes of unusual or strange behavior, including medical and psychiatric illnesses. Two of the more common causes are:

  • Delirium -- Sudden or quick onset of reduced consciousness, awareness, perception, or thought that may be a symptom of a medical illness such as brain or mental dysfunction
  • Dementia -- Chronic, worsening loss of cognitive function that occurs with brain disorders

Possible causes of strange behavior in older people include:

Possible causes in people of all ages include:

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Reviewer Info: Luc Jasmin, MD, PhD, Departments of Anatomy & Neurological Surgery, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.; ADAM Health Illustrated Encyclopedia, 02/13/2008
 
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