Network neuroscience of apathy in cerebrovascular disease. (May 2020)

• Record Type: Journal Article
• Authors: Tay, Jonathan; Lisiecka-Ford, Danuta M.; Hollocks, Matthew J.; Tuladhar, Anil M.; Barrick, Thomas R.; Forster, Anne; O'Sullivan, Michael J.; Husain, Masud; de Leeuw, Frank-Erik; Morris, Robin G.; Markus, Hugh S.
• Is Part Of: Progress in neurobiology. Volume 188(2020)
• Publication Date: 2020-05
• Subjects: SVD small vessel disease -- GDB goal-directed behavior -- WMH white matter hyperintensities -- PFC prefrontal cortex -- ACC anterior cingulate cortex -- OFC orbitofrontal cortex -- SMA supplementary motor area -- NAA N-acetylaspartate -- rCBF regional cerebral blood flow -- DTI diffusion tensor imaging -- FA fractional anisotropy -- rTMS repetitive transcranial magnetic stimulation -- CADASIL Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy -- CRP C-reactive protein -- TMT-B Trail Making Test part B -- BMI body mass index; Apathy -- Stroke -- Cerebral small vessel disease -- Cerebrovascular disease -- Networks -- Cognition; Neurobiology -- Periodicals; Neurology -- Periodicals; Neurology -- Periodicals; Neurobiologie -- Périodiques; 612.8
• DOI: 10.1016/j.pneurobio.2020.101785
• Languages: English
• ISSNs: 0301-0082

Abstract

Highlights: A network-based model may be able to describe apathy in cerebrovascular disease. Focal network damage, such as in stroke, could lead to network failure and apathy. Changes to remote regions or network disconnection can lead to apathy over time. Specific subnetworks may underlie motivation-related cognitive functioning. Understanding the network basis of apathy could lead to targeted treatments. Abstract: Apathy is a reduction in motivated goal-directed behavior (GDB) that is prevalent in cerebrovascular disease, providing an important opportunity to study the mechanistic underpinnings of motivation in humans. Focal lesions, such as those seen in stroke, have been crucial in developing models of brain regions underlying motivated behavior, while studies of cerebral small vessel disease (SVD) have helped define the connections between brain regions supporting such behavior. However, current lesion-based models cannot fully explain the neurobiology of apathy in stroke and SVD. To address this, we propose a network-based model which conceptualizes apathy as the result of damage to GDB-related networks. A review of the current evidence suggests that cerebrovascular disease-related pathology can lead to network changes outside of initially damaged territories, which may propagate to regions that share structural or functional connections. The presentation and longitudinal trajectory of apathy in stroke and SVD may be the result of these network changes. Distinct subnetworks might support cognitive components of GDB, the disruption of which results in specific symptoms of apathy. This network-based model of apathy may open new approaches for investigating its underlying neurobiology, and presents novel opportunities for its diagnosis and treatment.