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Psychiatry · Neurology

Abnormal Involuntary Movement Scale (AIMS) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Muscles of facial expression

Movements of the forehead, eyebrows, periorbital area and cheeks, such as frowning, blinking, smiling and grimacing.

Lips and perioral area

For example puckering, pouting and smacking.

Jaw

For example biting, clenching, chewing, mouth opening and lateral movement.

Tongue

Rate only increases in movement both in and out of the mouth, not inability to sustain movement.

Upper extremities (arms, wrists, hands, fingers)

Include choreic and athetoid movements. Do not include tremor.

Lower extremities (legs, knees, ankles, toes)

For example lateral knee movement, foot tapping, heel dropping, foot squirming, and inversion and eversion of the foot.

Neck, shoulders, hips

For example rocking, twisting, squirming and pelvic gyrations.

Result

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Clinical inputs

  • Muscles of facial expression
  • Lips and perioral area
  • Jaw
  • Tongue
  • Upper extremities (arms, wrists, hands, fingers)
  • Lower extremities (legs, knees, ankles, toes)
  • Neck, shoulders, hips

Primary source

Guy W. Abnormal Involuntary Movement Scale (AIMS). In: ECDEU Assessment Manual for Psychopharmacology, Revised. US Department of Health, Education, and Welfare, Publication No. (ADM) 76-338; 1976. Read from the public-domain AIMS examination form distributed by the Maryland Department of Health. Facial and oral movements: item 1 muscles of facial expression (forehead, eyebrows, periorbital area, cheeks, including frowning, blinking, smiling, grimacing); item 2 lips and perioral area (puckering, pouting, smacking); item 3 jaw (biting, clenching, chewing, mouth opening, lateral movement); item 4 tongue (rate only increases in movement both in and out of the mouth, not inability to sustain movement). Extremity movements: item 5 upper extremities (arms, wrists, hands, fingers; include choreic and athetoid movements, do not include tremor); item 6 lower extremities (legs, knees, ankles, toes; lateral knee movement, foot tapping, heel dropping, foot squirming, inversion and eversion of the foot). Trunk movements: item 7 neck, shoulders, hips (rocking, twisting, squirming, pelvic gyrations). Each is rated 0 none, 1 minimal (may be extreme normal), 2 mild, 3 moderate, 4 severe. Items 8 to 10 are global judgments (severity, incapacitation, patient awareness) and the remaining items record dental status. The form prints no total-score cutoff. The result here is the sum of items 1 to 7, range 0 to 28, with no threshold. (1976)

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