Addenbrooke's Cognitive Examination-Revised (ACER)

Related Subjects: |Cortical functions |Motor System |Sensory System |Mental state Examination |Speech and Language Exam |Cranial nerves and examination |Assessing Cognition

The Addenbrooke’s Cognitive Examination-Revised (ACE-R) (2006) is a detailed yet brief clinician-administered screening tool (100 points total) for detecting dementia (Alzheimer’s, frontotemporal, vascular, Lewy body, etc.) and mild cognitive impairment (MCI). It provides a total score plus five domain subscores, allowing pattern-based differentiation of dementia subtypes - more sensitive than the MMSE.

📊 Domains & Maximum Points

• Attention & Orientation (18 points): Time/place orientation, serial 7s or WORLD backwards.
• Memory (26 points): 3-word immediate/delayed recall & recognition, name/occupation recall, recent/remote autobiographical memory.
• Fluency (14 points): Phonemic (P-words in 60s) + semantic (animals in 60s).
• Language (26 points): Naming objects, comprehension, repetition, reading/writing irregular words, sentence writing.
• Visuospatial (16 points): Copy intersecting pentagons, draw clock, count dots, match wire cube/perceptual figures.

📈 Scoring & Interpretation

• Total score: 0–100 (higher = better).
• Cut-offs (from original validation & common use):
  • ≥88: Normal (high specificity for no dementia).
  • 83–87: Borderline - consider repeat or further tests.
  • ≤82: Indicates likely cognitive impairment (good sensitivity/specificity in many populations; adjust lower for low education/non-native speakers).
• Helpful domain patterns for subtype clues:
  • Heavy memory/orientation loss: Classic Alzheimer’s disease.
  • Fluency/language prominent (memory relatively spared): Frontotemporal dementia.
  • Visuospatial/perceptual deficits: Lewy body dementia, posterior cortical atrophy, parkinsonian dementias.
  • Variable/mixed: Vascular or mixed dementia.

⚕️ Clinical Uses

• Screening for dementia/MCI in memory clinics, neurology, geriatrics, primary care.
• Differentiating dementia subtypes (better than MMSE).
• Monitoring progression or treatment response over time.
• Research/trials (though ACE-III now more common).

⏱️ Administration

• By trained healthcare professional (doctor, nurse, psychologist).
• Takes 12–20 minutes (typically ~15 min).
• Requires only pen, paper, and the test form.
• Free downloads available (see below).

⚠️ Limitations

• Not standalone diagnostic - integrate with history, collateral, imaging, bloods.
• Educational, cultural, language, and literacy bias (scores lower in low-education/non-English groups; adjust cut-offs).
• Longer than brief screens (MMSE/MoCA); may fatigue severely impaired patients.
• Copyright overlap with MMSE elements - largely replaced by ACE-III (2013) in current practice (domains/scoring identical, free, no copyright issues).

✨ Summary

The ACE-R is a strong, domain-detailed 100-point screen excellent for detecting and subtyping dementia (superior to MMSE).
Score ≤82 (or adjusted) → high suspicion of impairment → full diagnostic workup.
For new assessments in 2026, prefer the freely available ACE-III (very similar; same interpretation rules apply).

📚 Key References & Article Links

• Original ACE-R validation article (Mioshi et al., 2006):
  Mioshi E, Dawson K, Mitchell J, Arnold R, Hodges JR. The Addenbrooke's Cognitive Examination Revised (ACE-R): a brief cognitive test battery for dementia screening. Int J Geriatr Psychiatry. 2006;21(11):1078-1085.
  • PubMed abstract: https://pubmed.ncbi.nlm.nih.gov/16977673/
  • DOI (full text via Wiley or institutional access): https://doi.org/10.1002/gps.1610
  • ResearchGate mirror (often has full PDF): ResearchGate page
• ACE-III (current preferred version) overview & downloads (including ACE-R score converter):
  University of Sydney / Frontier Group official page: https://www.sydney.edu.au/brain-mind/our-clinics/dementia-test.html
  (Includes PDFs in multiple languages, training, and Excel tool for equating ACE-R to ACE-III scores.)
• Additional related article (Hsieh et al., 2013 – ACE-III introduction):
  Often cited for transition from ACE-R. Full text via PLOS ONE or PubMed (search "Hsieh ACE-III 2013").
  PubMed example: Related validation study
• ACE-R test form downloads (examples):
  • Australian Version A PDF: Download here
  • Scoring guide supplement: Download scoring guide