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Review
. 2023 Jul 22;11(1):32.
doi: 10.1007/s13755-023-00231-0. eCollection 2023 Dec.

Multimodal learning of clinically accessible tests to aid diagnosis of neurodegenerative disorders: a scoping review

Guan Huang  1   2 , Renjie Li  1   2 , Quan Bai  1 , Jane Alty  2   3   4
Affiliations
Review

Multimodal learning of clinically accessible tests to aid diagnosis of neurodegenerative disorders: a scoping review

Guan Huang et al. Health Inf Sci Syst. .

Abstract

With ageing populations around the world, there is a rapid rise in the number of people with Alzheimer's disease (AD) and Parkinson's disease (PD), the two most common types of neurodegenerative disorders. There is an urgent need to find new ways of aiding early diagnosis of these conditions. Multimodal learning of clinically accessible data is a relatively new approach that holds great potential to support early precise diagnosis. This scoping review follows the PRSIMA guidelines and we analysed 46 papers, comprising 11,750 participants, 3569 with AD, 978 with PD, and 2482 healthy controls; the recency of this topic was highlighted by nearly all papers being published in the last 5 years. It highlights the effectiveness of combining different types of data, such as brain scans, cognitive scores, speech and language, gait, hand and eye movements, and genetic assessments for the early detection of AD and PD. The review also outlines the AI methods and the model used in each study, which includes feature extraction, feature selection, feature fusion, and using multi-source discriminative features for classification. The review identifies knowledge gaps around the need to validate findings and address limitations such as small sample sizes. Applying multimodal learning of clinically accessible tests holds strong potential to aid the development of low-cost, reliable, and non-invasive methods for early detection of AD and PD.

Keywords: Age-related diseases; Alzheimer’s disease; Artificial intelligence; Diagnosis; Multimodal learning; Multiple biomarkers; Parkinson’s disease; Pre-clinical.

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Figures

Fig. 1
Fig. 1
Model of the cognitive function decline trajectory of Alzheimer’s disease (AD) vs normal ageing. The stage of preclinical AD precedes with mild cognitive impairment (MCI), graph adapted from [10]
Fig. 2
Fig. 2
PRSIMA flow chart of the scoping review. This diagram shows the processing of scoping review, including identification, screening and the number of papers included in our study
Fig. 3
Fig. 3
Meta-data from the review process
See this image and copyright information in PMC

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