Neuroimaging in Functional Neurological Disorder: State of the Field and Research Agenda, 2021, Perez, Carson, Edwards, Hallet, Stone et al

In relation to Walitt et al. this paper says —

Referencing —

The involuntary nature of conversion disorder (2010, Neurology)

Pathogenesis and pathophysiology of functional psychogenic movement disorders (2019, Neurobiology of Disease)

Neural correlates of sense of agency in motor control: A neuroimaging meta-analysis (2020, PLOS ONE)

 

Hi @Arnie Pye! You wrote this comment a year ago, but I just noticed you didn't get a reply.

"Network dynamics" is a pretty loose term, but it generally refers methods that try to measure the degree to which activity in two brain regions is "synchronised". One common method is to put people in the fMRI scanner, ask them to just lie there, and then look at the ebb and flow of brain activity as they lie there. So in the figure below, you see that some regions are "in synch". As activity in one of them rises, so does the other one. Other areas are in opposition - as activity in one rises, activity in the other goes down. You can use these data to build maps of the various "networks" in the brain.



The networks that you see when people are just lying in the scanner are pretty consistent across individuals.

So then you can look at whether there are differences between clinical groups in the degree of synchrony between two areas. You can just compare how much synchrony there is within known networks. Or alternatively, you can look at more complicated measures, like how rapidly people "switch" between different networks and how much total time they spend in each state.

Nobody really knows what it all means.

 

Or if it has any relevance at all.