Right Hemisphere Syndromes

Hoffmann, Michael

doi:10.1007/978-3-319-33181-2_9

Cognitive, Conative and Behavioral Neurology 2016

DOI: 10.1007/978-3-319-33181-2_9

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Right Hemisphere Syndromes

Michael Hoffmann

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2023

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“…[7][8][9][10] Yet other studies suggest time disorientation may also have features that are separable from amnesia. [11][12][13] Other regional anatomy that has been implicated in time orientation includes the mediodorsal nucleus of the thalamus, 14,15 the right cerebral hemisphere, 16 the precuneus, 17 and the prefrontal cortex. 17 The extent to which these regional associations are correlational or causal is unclear, as is the relative contribution of each region.…”

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Localization of a Medial Temporal Lobe—Precuneus Network for Time Orientation

Skye

Bruss

Herbet

et al. 2023

Annals of Neurology

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ObjectiveTime orientation is a fundamental cognitive process in which one's personal sense of time is matched with a universal reference. Time orientation is commonly assessed through mental status examination, yet its neural correlates remain unclear. Large lesions have been associated with deficits in time orientation, but the regional anatomy implicated in time disorientation is not well established. The current study investigates the anatomy of time disorientation and its network correlates in patients with focal brain lesions.MethodsTime orientation was assessed 3 months or more after lesion onset using the Benton Temporal Orientation Test (BTOT) in 550 patients with acquired, focal brain lesions, 39 of whom were impaired. Multivariate lesion‐symptom mapping and lesion network mapping were used to evaluate the anatomy and networks associated with time disorientation. Performance on a variety of neuropsychological tests was compared between the time oriented and time disoriented group.ResultsLesion‐symptom mapping showed that lesions of the precuneus, medial temporal lobes (MTL), and occipito‐temporal cortex were associated with time disorientation (r = 0.264, p < 0.001). Lesion network mapping using normative connectome data demonstrated that these regional findings occurred along a network that includes white and gray matter connecting the precuneus and MTL. There was a strong behavioral and anatomical association of time disorientation with memory impairment, such that the 2 processes could not be fully disentangled.InterpretationWe interpret these findings as novel evidence for a network involving the precuneus and the medial temporal lobe in supporting time orientation. ANN NEUROL 2023

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confidence: 99%

Localization of a Medial Temporal Lobe—Precuneus Network for Time Orientation

Skye

Bruss

Herbet

et al. 2023

Annals of Neurology

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Right Hemisphere Syndromes

Cited by 1 publication

References 147 publications

Localization of a Medial Temporal Lobe—Precuneus Network for Time Orientation

Localization of a Medial Temporal Lobe—Precuneus Network for Time Orientation

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