A recent systematic review examines biomarkers, as strictly defined, for neurodegenerative diseases.
“Vast improvements in neuroimaging techniques have led to newly discovered biomarkers and diagnostics”. p.5
Behavioural biomarkers are mentioned hardly at all.
Maclin, JMA. Wang, T. [and] Xiao, S. (2019. Biomarkers for the diagnosis of Alzheimer’s disease, dementia Lewy body, frontotemporal dementia and vascular dementia. General Psychiatry. February 23rd 2019; 32(1): e100054.
Do behavioural biomarkers exist? If they do exist, is the term technically a “misnomer”? A mini-review of recent Alzheimer’s Research UK research:
Spatial navigation: a behavioural biomarker for improved dementia diagnosis? Journal of Geriatric Care and Research (JGCR). June 2019. Vol.6(1): 20-22.