Which impairment describes involuntary movements that are not contextually appropriate?

• A. Left-right confusion
• B. Disinhibition of associated movements
• C. Minor physical anomalies of the face and limbs
• D. Psychotic features emergence

Answer: (B)

Disinhibition of associated movements is the phenomenon where automatic movements accompany a voluntary action but occur involuntarily and inappropriately because inhibitory control over those movements is released. This is often a sign of frontal lobe dysfunction, where the brain’s normal inhibition of incidental or non-goal-directed movements is reduced. In practice, you might see extra, unintended motions in muscles or body parts that aren’t involved in the task at hand, making the movement appear inappropriately animated or out of context.

This differs from left-right confusion, which is a perceptual or cognitive mislocalization issue; minor physical anomalies of the face and limbs, which are structural features; and psychotic features emergence, which refers to new psychiatric symptoms like delusions or hallucinations. The key concept here is the loss of inhibitory control over automatic movements, leading to involuntary, contextually inappropriate actions.