Intelligence is a fundamental ability that sets humans apart from other animal species. Despite its importance in defining human behaviour, the neural networks responsible for intelligence are not well understood. The dominant view from neuroimaging work suggests that intelligent performance on a range of tasks is underpinned by segregated interactions in a fronto-parietal network of brain regions. Here we asked whether fronto-parietal interactions associated with intelligence are ubiquitous, or emerge from more widespread associations in a task-free context. First we undertook an exploratory mapping of the existing literature on functional connectivity associated with intelligence. Next, to empirically test hypotheses derived from the exploratory mapping, we performed network analyses in a cohort of 317 unrelated participants from the Human Connectome Project. Our results revealed a novel contribution of across-network interactions between default-mode and fronto-parietal networks to individual differences in intelligence at rest. Specifically, we found that greater connectivity in the resting state was associated with higher intelligence scores. Our findings highlight the need to broaden the dominant fronto-parietal conceptualisation of intelligence to encompass more complex and context-specific network dynamics.
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Meditation is a conscious mental process that induces a set of integrated physiologic changes termed the relaxation response. Functional magnetic resonance imaging (fMRI) was used to identify and characterize the brain regions that are active during a simple form of meditation. Significant (p<10(-7)) signal increases were observed in the group-averaged data in the dorsolateral prefrontal and parietal cortices, hippocampus/parahippocampus, temporal lobe, pregenual anterior cingulate […]
The Journal of Nervous and Mental Disease
A cross-sectional national telephone survey was used to determine whether Christian Scientists (N = 230), a religious group that uses mind/body (including spiritual) healing, self-report more or less illness than non-Christian Scientists (N = 589). The primary outcome measure was the proportion of Christian Scientists and non-Christian Scientists that, during the previous 12 months: a) experienced any of 13 common medical conditions or symptoms; and b) used conventional medicine, unco […]
In light of World Sleep Day this month, this week’s guest post features Valerie Teh, Calmer’s Client Manager and Self-Care Practitioner, who shares her expertise on how to explore and embrace intelligent rest to enhance quality sleep and nurture your overall wellbeing.