AIMS (Tardive Dyskinesia)

Abnormal Involuntary Movement Scale (AIMS): Critical for monitoring Tardive Dyskinesia (TD) in patients treated with antipsychotic medications.

Facial/Oral: Muscles of Facial Expression

Facial/Oral: Lips and Perioral Area

Facial/Oral: Jaw

Facial/Oral: Tongue

Extremities: Upper (Arms, Wrists, Hands, Fingers)

Extremities: Lower (Legs, Knees, Ankles, Toes)

Trunk: Neck, Shoulder, Hip Stability

Global: Severity of abnormal movements

Global: Incapacitation due to movements

Global: Patient awareness of movements

Guidelines & Evidence

Verified

Last Review: 2026-07-17

When to Use

Routine tardive dyskinesia (TD) monitoring in patients on long-term antipsychotic therapy

Baseline assessment before initiating antipsychotic treatment, especially first-generation agents

Every 6-month screening in patients on first-generation antipsychotics; every 12 months on second-generation antipsychotics (APA guideline)

Evaluating severity of abnormal involuntary movements in orofacial, extremity, and truncal regions

Monitoring response to TD treatments such as deutetrabenazine or valbenazine

How it Works

Scoring Domains

Facial and Oral Movements (Items 1–4): Muscles of facial expression, lips, jaw, and tongue

Extremity Movements (Items 5–6): Upper and lower extremities

Trunk Movements (Item 7): Neck, shoulders, and hips

Global Judgments (Items 8–10): Overall severity, incapacitation, and patient awareness

Dental Status (Item 11): Dental problems that may confound oral TD assessment

Scoring System

Score	Descriptor	Clinical Meaning
0	None	No abnormal movement
1	Minimal	May be extreme normal; barely perceptible
2	Mild	Clearly abnormal but of low amplitude
3	Moderate	Clearly abnormal, noticeable
4	Severe	High amplitude, forceful movements

Total Score Calculation

AIMS Total (Items 1–7) = Sum of first 7 items Range: 0 to 28 AIMS Total (Items 1–10) = Sum of all 10 scored items (less common) Range: 0 to 40 Clinically significant TD: ≥ 2 items with score ≥ 2 on Items 1–7, OR one item with score ≥ 3

Clinical Pearls

Key Clinical Considerations

TD prevalence in first-generation antipsychotics: ~20–30%; second-generation: ~3–5% but remains clinically relevant

AIMS should be performed before the morning antipsychotic dose for most reliable assessment

Ask the patient to remove dentures, shoes, and any restrictive clothing before assessment

Orofacial movements are the earliest and most common TD sign; examine tongue at rest inside the mouth

Distinguish TD from tardive dystonia, parkinsonism (SAS), and akathisia (BARS) — all require different management

For patients unable to cooperate with active movements, use the examination rating without movement scores

Differential Diagnosis of Abnormal Movements

Condition	AIMS Features	Differentiating Factor
Tardive Dyskinesia	Choreiform, athetoid, or rhythmic movements	Persistent; onset > 3 months of antipsychotic exposure
Drug-Induced Parkinsonism	Tremor, rigidity, bradykinesia	Rapid onset; responds to dose reduction or anticholinergics
Akathisia (BARS)	Restlessness, pacing, inability to sit still	Subjective inner restlessness; worse with higher doses
Spontaneous Dyskinesia	Similar orofacial movements	Unrelated to antipsychotic; common in elderly, dementia
Huntington Disease	Chorea with cognitive decline	Family history; genetic testing confirms HTT expansion

Last Comprehensive Review: 2026-07-17

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AIMS (Tardive Dyskinesia)

When to Use

When to Use

How it Works

Scoring Domains

Scoring System

Total Score Calculation

Clinical Pearls

Key Clinical Considerations

Differential Diagnosis of Abnormal Movements

Next Steps

Actionable Steps

The Evidence

Primary Reference

ECDEU Assessment Manual for Psychopharmacology: Revised, 1976. Abnormal Involuntary Movement Scale (AIMS).

Research diagnoses for tardive dyskinesia.

Origins & History

Development

In Recent Clinical News

AIMS (Tardive Dyskinesia)

When to Use

When to Use

How it Works

Scoring Domains

Scoring System

Total Score Calculation

Clinical Pearls

Key Clinical Considerations

Differential Diagnosis of Abnormal Movements

Next Steps

Actionable Steps

The Evidence

Primary Reference

ECDEU Assessment Manual for Psychopharmacology: Revised, 1976. Abnormal Involuntary Movement Scale (AIMS).

Research diagnoses for tardive dyskinesia.

Origins & History

Development

In Recent Clinical News