Mental confusion

From Wikipedia, the free encyclopedia
  (Redirected from Confusion)
Jump to: navigation, search

Confusion (from Latin confusĭo, -ōnis, noun of action from confundere "to pour together", or "to mingle together" also "to confuse") is the state of being bewildered or unclear in one’s mind about something.

Medical term[edit]

Mental Confusion Classifications
ICD-10 R41.0
ICD-9 298.9
MedlinePlus 003205
MeSH D003221

The term, "acute mental confusion"[1] is often used interchangeably with delirium[2] in International Statistical Classification of Diseases and Related Health Problems and Medical Subject Headings to describe a pathological degree in which it usually refers to loss of orientation (ability to place oneself correctly in the world by time,[3] location;[3] and/or personal identity[3]) and sometimes accompanied by disordered consciousness (loss of linear thinking)[3] and loss of memory (the ability to correctly recall previous events or learn new material).


Confusion may result from drug side effects.[4]

Confusion may result from a relatively sudden brain dysfunction. Acute confusion is often called delirium (also called acute confusional state),[5] although delirium also includes a much broader array of disorders than confusion (e.g. inability to focus attention; and various impairments in awareness, or temporal and spatial orientation).

Confusion may also result from chronic organic brain pathologies such as dementia.

Differential diagnosis[edit]

The most common causes of drug induced acute confusion are dopaminergic drugs used for Parkinson's disease, diuretics, tricyclic or tetracyclic antidepressants and benzodiazepines. The elderly, and especially those with pre-existing dementia, are at most risk for drug induced acute confusional states.[6]

New research is finding a link between Vitamin D deficiencies and cognitive impairment, which includes memory loss and a 'foggy brain'.[7]

See also[edit]


  1. ^ Confusion Definition; Oxford Dictionary online; accessed .
  2. ^ Delirium; Sympton Finder online ; accessed .
  3. ^ a b c d > confusion (redirected from mental confusion) Citing: Dorland's Medical Dictionary for Health Consumers; 2007; Saunders (an imprint of Elsevier, Inc.)
  4. ^ Waters, Jo. "Why don't GPS warn you that statins can harm your memory?". Daily Mail. 
  5. ^ > Acute Confusional State; Dr. Gurvinder Rull; Document ID/Version/Reference: 1714/22/bgp2104; (Updated: 13 Jan 2009); accessed: .
  6. ^ Hufschmidt, A.; Shabarin, V.; Zimmer, T. (Dec 2009). "Drug-induced confusional states: the usual suspects?". Acta Neurologica Scandinavica 120 (6): 436–8. doi:10.1111/j.1600-0404.2009.01174.x. PMID 19804475. 
  7. ^ Vitamin D Linked to Cognitive Impairment; Third Age online; accessed: .

External links[edit]