ReviewCurrent allergy and asthma reports2018
Olfactory Dysfunction in Neurodegenerative Diseases.
Review in Current allergy and asthma reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07445945 (Physiological Effect of Non-invasive Photobiomodulation on Cognition and Mood in Older Adults With Subjective Cognitive Impairment), which is not on this map. Cited by 152 papers, 7 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Physiological Effect of Non-invasive Photobiomodulation on Cognition and Mood in Older Adults With Subjective Cognitive Impairment
Who cites it
152 citing papers in PubMed, 7 syntheses or guidelines pooled it, 263 citations in OpenAlex.
- Genome-wide association study meta-analysis uncovers novel genetic variants associated with olfactory dysfunction.BMC genomic data · 2025Pooled it
- Diagnostic value of olfactory function testing for Alzheimer's disease and mild cognitive impairment: a systematic review and meta-analysis.Frontiers in aging neuroscience · 2025Pooled it
- The efficacy of olfactory training in improving olfactory function: a meta-analysis.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2024Pooled it
- Olfactory Dysfunction as a Biomarker for Early Diagnosis of Cognitive Impairment in Patients With Type 2 Diabetes: A Systematic Review.Journal of diabetes research · 2024Pooled it
- Olfactory dysfunction in aging and neurodegenerative diseases.Ageing research reviews · 2021Pooled it
- The Correlation Between Olfactory Test and Hippocampal Volume in Alzheimer's Disease and Mild Cognitive Impairment Patients: A Meta-Analysis.Frontiers in aging neuroscience · 2021Pooled it
- Association of Odor Identification Ability With Amyloid-β and Tau Burden: A Systematic Review and Meta-Analysis.Frontiers in neuroscience · 2020Pooled it
- Cellular redox status is linked to olfactory alterations in cognitive decline.Redox biology · 2026Article
- Olfactory Bulb Volume Reflects Olfactory Dysfunction and Network Organization: Insights From the Population-Based Rhineland Study.International forum of allergy & rhinology · 2026Article
- Noninvasive Electrophysiological Biomarkers of Olfactory Responses Across Cognitive States in Alzheimer Dementia: Cross-Sectional Study.JMIR mHealth and uHealth · 2026Article
- Subjective and objective olfactory dysfunction and its screening value in patients with subjective cognitive decline, mild cognitive impairment, and Alzheimer's dementia.Neuropsychiatrie : Klinik, Diagnostik, Therapie und Rehabilitation : Organ der Gesellschaft Osterreichischer Nervenarzte und Psychiater · 2026Article
- Progress of Immunotherapies in Parkinson's Disease.CNS neuroscience & therapeutics · 2026Review
- Case report of Parkinson's disease in isolated congenital anosmia with absent olfactory bulbs.NPJ Parkinson's disease · 2026Article
- Olfactory dysfunction as a marker of neurodegenerative disease in older adults.Aging clinical and experimental research · 2026Article
- Olfactory decline tracks central-to-peripheral spread of tau pathology in Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- The cribriform plate: A dynamic central nervous system-immune hub.The Journal of experimental medicine · 2026Review
- Olfactory-to-Entorhinal Network Dysrhythmias Drive Parkinson's Cognitive Impairment Through Frequency-Specific Oscillatory Decoupling.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- The Sense of Smell (SoS) Atlas: Its Creation and First Application to Investigate COVID-19 Related Anosmia With a Comprehensive Quantitative MRI Protocol.Journal of magnetic resonance imaging : JMRI · 2026Article
- Olfactory ERP-based classification of anosmia and normosmia using machine learning.Clinical neurophysiology practice · 2026Article
- Point-of-care smell testing for evaluation of olfactory function: a narrative review of clinical utility.Frontiers in allergy · 2026Review
92 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purpose of reviewThe sense of smell is today one of the focuses of interest in aging and neurodegenerative disease research. In several neurodegenerative diseases, such as Parkinson's disease and Alzheimer's disease, the olfactory dysfunction is one of the initial symptoms appearing years before motor symptoms and cognitive decline, being considered a clinical marker of these diseases' early stages and a marker of disease progression and cognitive decline. Overall and under the umbrella of precision medicine, attention to olfactory function may help to improve chances of success for neuroprotective and disease-modifying therapeutic strategies. RECENT
findingsThe use of olfaction, as clinical marker for neurodegenerative diseases is helpful in the characterization of prodromal stages of these diseases, early diagnostic strategies, differential diagnosis, and potentially prediction of treatment success. Understanding the mechanisms underlying olfactory dysfunction is central to determine its association with neurodegenerative disorders. Several anatomical systems and environmental factors may underlie or contribute to olfactory loss associated with neurological diseases, although the direct biological link to each disorder remains unclear and, thus, requires further investigation. In this review, we describe the neurobiology of olfaction, and the most common olfactory function measurements in neurodegenerative diseases. We also highlight the evidence for the presence of olfactory dysfunction in several neurodegenerative diseases, its value as a clinical marker for early stages of the diseases when combined with other clinical, biological, and neuroimage markers, and its role as a useful symptom for the differential diagnosis and follow-up of disease. The neuropathological correlations and the changes in neurotransmitter systems related with olfactory dysfunction in the neurodegenerative diseases are also described.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.