Metabolic brain networks in translational neurology: Concepts and applications

• Published in: Annals of neurology Vol. 72; no. 5; pp. 635 - 647
• Main Authors: Niethammer, Martin, Eidelberg, David
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.11.2012; Wiley-Liss; Wiley Subscription Services, Inc
• Subjects: Biological and medical sciences; Brain - metabolism; Brain - physiopathology; Brain Mapping; Brain research; Humans; Medical diagnosis; Medical research; Medical sciences; Metabolic Networks and Pathways; Nervous system (semeiology, syndromes); Nervous system as a whole; Nervous System Diseases - pathology; Nervous System Diseases - therapy; Neurology; Neurology; Nervous system diseases; Central nervous system; Encephalon
• ISSN: 0364-5134; 1531-8249; 1531-8249
• DOI: 10.1002/ana.23631

Over the past 2 decades, functional imaging techniques have become commonplace in the study of brain disease. Nevertheless, very few validated analytical methods have been developed specifically to identify and measure systems‐level abnormalities in living patients. Network approaches are particularly relevant for translational research in the neurodegenerative disorders, which often involve stereotyped abnormalities in brain organization. In recent years, spatial covariance mapping, a multivariate analytical tool applied mainly to metabolic images acquired in the resting state, has provided a useful means of objectively assessing brain disorders at the network level. By quantifying network activity in individual subjects on a scan‐by‐scan basis, this technique makes it possible to objectively assess disease progression and the response to treatment on a system‐wide basis. To illustrate the utility of network imaging in neurological research, we review recent applications of this approach in the study of Parkinson disease and related movement disorders. Novel uses of the technique are discussed, including the prediction of cognitive responses to dopaminergic therapy, evaluation of the effects of placebo treatment on network activity, assessment of preclinical disease progression, and the use of automated pattern‐based algorithms to enhance diagnostic accuracy. ANN NEUROL 2012;72:635–647