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Summary: Trinity College Dublin researchers report controlled breathing, a key element of meditation, directly affects noradrenaline levels in the brain. The study suggests controlled breathing can enhance attention and improve overall brain health.
Source: Trinity College Dublin.
It has long been claimed by Yogis and Buddhists that meditation and ancient breath-focused practices, such as pranayama, strengthen our ability to focus on tasks. A new study by researchers at Trinity College Dublin explains for the first time the neurophysiological link between breathing and attention.
Breath-focused meditation and yogic breathing practices have numerous known cognitive benefits, including increased ability to focus, decreased mind wandering, improved arousal levels, more positive emotions, decreased emotional reactivity, along with many others. To date, however, no direct neurophysiological link between respiration and cognition has been suggested.
The research shows for the first time that breathing – a key element of meditation and mindfulness practices – directly affects the levels of a natural chemical messenger in the brain called noradrenaline. This chemical messenger is released when we are challenged, curious, exercised, focused or emotionally aroused, and, if produced at the right levels, helps the brain grow new connections, like a brain fertiliser. The way we breathe, in other words, directly affects the chemistry of our brains in a way that can enhance our attention and improve our brain health.
The article, http://neurosciencenews.com/cognition-meditation-breathing-9026/amp
Abstract
Coupling of respiration and attention via the locus coeruleus: Effects of meditation and pranayama
The locus coeruleus (LC) has established functions in both attention and respiration. Good attentional performance requires optimal levels of tonic LC activity, and must be matched to task consistently.
LC neurons are chemosensitive, causing respiratory phrenic nerve firing to increase frequency with higher CO2 levels, and as CO2 level varies with the phase of respiration, tonic LC activity should exhibit fluctuations at respiratory frequency. Top‐down modulation of tonic LC activity from brain areas involved in attentional regulation, intended to optimize LC firing to suit task requirements, may have respiratory consequences as well, as increases in LC activity influence phrenic nerve firing.
We hypothesize that, due to the physiological and functional overlaps of attentional and respiratory functions of the LC, this small neuromodulatory nucleus is ideally situated to act as a mechanism of synchronization between respiratory and attentional systems, giving rise to a low‐amplitude oscillation that enables attentional flexibility, but may also contribute to unintended destabilization of attention.
Meditative and pranayama practices result in attentional, emotional, and physiological enhancements that may be partially due to the LC’s pivotal role as the nexus in this coupled system. We present original findings of synchronization between respiration and LC activity (via fMRI and pupil dilation) and provide evidence of a relationship between respiratory phase modulation and attentional performance.
We also present a mathematical dynamical systems model of respiratory‐LC‐attentional coupling, review candidate neurophysiological mechanisms of changes in coupling dynamics, and discuss implications for attentional theory, meditation, and pranayama, and possible therapeutic applications.
Full paper available here, http://sci-hub.tw/10.1111/psyp.13091