functional disorder
Noun: A functional disorder is a medical condition characterized by a collection of symptoms that impair normal functioning, but for which no identifiable physiological (bodily) or anatomical (structural) cause can be found through standard medical testing. The disorder is believed to originate from abnormal functioning of a system or organ, rather than from a detectable disease or injury.
The term is used primarily in medical and psychological contexts to classify conditions where symptoms are real and distressing to the patient, but their origin is not linked to a clear physical abnormality. - It is often contrasted with organic disorder, which has a known physical cause. - Diagnosis typically involves ruling out other potential physiological or anatomical explanations.
- The patient's chronic digestive issues were ultimately diagnosed as a functional disorder, as all scans and tests returned normal results.
- Irritable bowel syndrome (IBS) is a common example of a functional gastrointestinal disorder.
- After extensive neurological workups found no lesions, her symptoms were categorized as a functional neurological disorder.
- Functional Somatic Syndrome: This is a broader term sometimes used to describe a group of related functional disorders, such as fibromyalgia or chronic fatigue syndrome, where central nervous system processing is thought to play a key role.
- The biopsychosocial model is often applied to understand functional disorders, considering the complex interaction of biological, psychological, and social factors.
- Functional (adj): Relating to the way something works or operates. In medicine, it often specifically denotes a condition affecting function without structural damage.
- Example: The problem was functional, not structural.
- Disorder (n): A disruption of normal physical or mental functions.
- Somatoform Disorder / Somatic Symptom Disorder: Older and current psychiatric classifications, respectively, for conditions where psychological factors are expressed as physical symptoms, closely related to the concept of functional disorders.
- Psychosomatic: (Adj) Relating to the interaction of mind and body, where mental factors can cause physical symptoms. This term is related but not synonymous, as it emphasizes the causative role of psychology.
- Non-organic disorder
- Medically unexplained symptoms (MUS) (This is a descriptive phrase rather than a direct synonym, but it is commonly used in the same context.)
- Functional somatic syndrome (for specific groups of disorders)
- Organic disorder: A disorder with a known and identifiable physiological or anatomical cause.
- Example: A brain tumor causing seizures is an organic disorder, not a functional one.
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disorder showing symptoms for which no physiological or anatomical cause can be identified
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