lability
Pronunciation: lah-BIL-ih-tee
Rapid, excessive changes in emotional expression that are disproportionate to the stimulus or situation.
Full Definition
Emotional lability refers to sudden, dramatic shifts in emotional expression that occur rapidly and are often inappropriate to the context or stimulus. Patients with lability may quickly transition from laughing to crying or from calm to agitated states without apparent external triggers or with minimal provocation. This symptom is distinct from normal emotional variability and represents a pathological inability to regulate emotional responses. Lability can be seen in various psychiatric conditions including bipolar disorder, borderline personality disorder, traumatic brain injury, and certain neurological conditions. It differs from mood swings in that the changes are more immediate and the emotional responses are often exaggerated relative to the situation. Clinical assessment should document the frequency, intensity, and triggers of labile episodes.
Usage
Usage note: Use 'emotional lability' rather than just 'lability' for clarity in interdisciplinary communications.
In Context
- "The patient demonstrated significant lability, shifting from tearfulness to laughter within minutes during the interview." — Psychiatric evaluation
- "Emotional lability following the traumatic brain injury required specialized intervention strategies." — Neuropsychiatric consultation