Across many studies subjective well-being has followed a U-shape in age, declining until people reach middle-age, only to rebound subsequently. Ill-being has followed a mirror-imaged hump-shape. Using graphical and regression analyses of repeat cross-sectional micro-data from the United States and the United Kingdom, we show this empirical regularity has been replaced by a monotonic decrease… Continue reading The declining #mental #health of the #young and the global disappearance of the #unhappiness hump shape in #age
Tag: Brain
Human #thalamocortical structural connectivity develops in line with a hierarchical axis of #cortical plasticity
Human cortical development follows a hierarchical, sensorimotor-to-association sequence. The brain’s capacity to enact this sequence indicates that it relies on unknown mechanisms to regulate regional differences in the timing of cortical maturation. Given evidence from animal systems that thalamic axons mechanistically regulate periods of cortical plasticity, here we evaluate in humans whether the development of… Continue reading Human #thalamocortical structural connectivity develops in line with a hierarchical axis of #cortical plasticity
DunedinPACNI estimates the longitudinal Pace of #Aging from a single brain #image to track health and disease
To understand how aging affects functional decline and increases disease risk, it is necessary to develop measures of how fast a person is aging. Using data from the Dunedin Study, we introduce an accurate and reliable measure for the rate of longitudinal aging derived from cross-sectional brain magnetic resonance imaging, that is, the Dunedin Pace… Continue reading DunedinPACNI estimates the longitudinal Pace of #Aging from a single brain #image to track health and disease
Active #Travel Mode and Incident #Dementia and #Brain Structure
Importance Active travel modes, such as walking and cycling, are feasible and readily embraced forms of physical activity, but their association with dementia risk and brain structure remains unclear.Objectives To investigate the long-term association between travel modes and dementia risk and brain structural metrics and to evaluate whether genetic predisposition could modify the association between… Continue reading Active #Travel Mode and Incident #Dementia and #Brain Structure
Lower slow wave #sleep and rapid eye movement sleep are associated with brain #atrophy of AD-vulnerable regions
Study Objectives:Sleep deficiency is associated with Alzheimer’s disease (AD) pathogenesis. We examined the association of sleep architecture with anatomical features observed in AD: (1) atrophy of hippocampus, entorhinal, inferior parietal, parahippocampal, precuneus, and cuneus regions (“AD-vulnerable regions”) and (2) cerebral microbleeds.Methods:In 270 participants of the Atherosclerosis Risk in the Communities Study, we examined the association… Continue reading Lower slow wave #sleep and rapid eye movement sleep are associated with brain #atrophy of AD-vulnerable regions
Reversible reduction in brain #myelin content upon #marathon running
Here we use magnetic resonance imaging to study the impact of marathon running on brain structure in humans. We show that the signal for myelin water fraction—a surrogate of myelin content—is substantially reduced upon marathon running in specific brain regions involved in motor coordination and sensory and emotional integration, but recovers within two months. These… Continue reading Reversible reduction in brain #myelin content upon #marathon running
Human #microplastic removal: what does the evidence tell us?
The increased levels of microplastics and nanoplastics (MNPs) found in human brain tissue are alarming, particularly in patients with dementia. Although total avoidance of MNP exposure will likely remain an unattainable endpoint in light of their ubiquity in the environment, new studies indicate feasible pathways by which dietary intake may be decreased or clearances improved.… Continue reading Human #microplastic removal: what does the evidence tell us?
Propagation of pathologic α-synuclein from #kidney to brain may contribute to #Parkinson’s disease
The pathogenesis of Lewy body diseases (LBDs), including Parkinson’s disease (PD), involves α-synuclein (α-Syn) aggregation that originates in peripheral organs and spreads to the brain. PD incidence is increased in individuals with chronic renal failure, but the underlying mechanisms remain unknown. Here we observed α-Syn deposits in the kidneys of patients with LBDs and in… Continue reading Propagation of pathologic α-synuclein from #kidney to brain may contribute to #Parkinson’s disease
The Neurologist’s Role in Promoting #Brain Health
Neurologic conditions are a leading cause of morbidity and mortality within the United States and worldwide. Brain health is a global concern, and the American Academy of Neurology's Brain Health Initiative promises to drive progress in this field over the next decades. Neurologists with detailed training and insight into brain function are uniquely positioned to… Continue reading The Neurologist’s Role in Promoting #Brain Health
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