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Definition

By Mayo Clinic staff

Frontotemporal dementia (frontotemporal lobar degeneration) is an umbrella term for a diverse group of uncommon disorders that primarily affect the frontal and temporal lobes of the brain — the areas generally associated with personality, behavior and language.

In frontotemporal dementia, portions of these lobes atrophy or shrink. Signs and symptoms vary, depending upon the portion of the brain affected. Some people with frontotemporal dementia undergo dramatic changes in their personality and become socially inappropriate, impulsive or emotionally indifferent, while others lose the ability to use and understand language.

Frontotemporal dementia is often misdiagnosed as a psychiatric problem or as Alzheimer's disease. But frontotemporal dementia tends to occur at a younger age than does Alzheimer's disease, typically between the ages of 40 and 70.

References
  1. Ropper AH, et al. Degenerative diseases of the nervous system. In: Ropper AH, et al. Adams and Victor's Principles of Neurology. 9th ed. New York, N.Y.: The McGraw-Hill Companies; 2009. http://www.accessmedicine.com/content.aspx?aID=3639100&searchStr=frontotemporal+dementia. Accessed Nov. 7, 2010.
  2. Simon RP, et al. Disorders of cognitive function. In: Simon RP, et al. Clinical Neurology. 7th ed. New York, N.Y.: The McGraw-Hill Companies; 2009. http://www.accessmedicine.com/content.aspx?aID=5145195&searchStr=frontotemporal+dementia. Accessed Nov. 7, 2010.
  3. Randall C. Frontotemporal dementia: Clinical features and diagnosis. http://www.uptodate.com/home/index.html. Accessed Nov. 7, 2010.
  4. NINDS Frontotemporal dementia information page. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/picks/picks.htm. Accessed Nov. 7, 2010.
  5. Seelaar H, et al. Clinical, genetic and pathological heterogeneity of frontotemporal dementia: a review. Journal of Neurology, Neurosurgery and Psychiatry. In press. Accessed Nov. 7, 2010.
  6. Kirshner HS. Frontotemporal dementia and primary progressive aphasia: An update. Current Neurology and Neuroscience Reports. 2010;10:504.
  7. Bird TD, et al. Dementia. In: Fauci AS, et al. Harrison's Principles of Internal Medicine. 17th ed. New York, N.Y.: The McGraw-Hill Companies. 2008. http://www.accessmedicine.com/content.aspx?aID=2904115&searchStr=frontotemporal+dementia. Accessed Nov. 7, 2010.
  8. Shadlen M, et al. Evaluation of cognitive impairment and dementia. http://www.uptodate.com/home/index.html. Accessed Nov. 7, 2010.
  9. Neurological diagnostic tests and procedures. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/misc/diagnostic_tests.htm. Accessed Nov. 7, 2010.
  10. Press D, et al. Treatment of behavioral symptoms related to dementia. http://www.uptodate.com/home/index.html. Accessed Nov. 7, 2010.
  11. Knopman DS (expert opinion), Mayo Clinic, Rochester, Minn. Nov. 14, 2010.
DS00874 Oct. 19, 2011

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