DTRs
Also written as: DTRs — Deep Tendon Reflexes
Deep tendon reflexes examined during neurological assessment to evaluate nervous system function and medication effects.
Full Definition
Deep tendon reflexes (DTRs) are involuntary muscle contractions elicited by striking specific tendons with a reflex hammer during physical examination. In psychiatric settings, DTR assessment is particularly important when monitoring for neurological side effects of medications, especially antipsychotics and mood stabilizers. Abnormal reflexes may indicate conditions such as lithium toxicity, tardive dyskinesia development, or underlying neurological disorders. DTRs are typically graded on a scale from 0 (absent) to 4+ (hyperactive with clonus). Common reflexes tested include patellar (knee-jerk), Achilles (ankle-jerk), biceps, triceps, and brachioradialis reflexes.
Usage
Usage note: Always use plural form (DTRs). Distinguish from other types of reflexes.
In Context
- "DTRs were hyperactive bilaterally, raising concern for lithium toxicity." — Neurological examination note
- "Annual DTR assessment showed no abnormalities in this patient on long-term antipsychotic therapy." — Medication monitoring documentation