Recent brain imaging studies using functional magnetic resonance imaging (fMRI) have implicated insula and anterior cingulate cortices in the empathic response to another’s pain. However, virtually nothing is known about the impact of the voluntary generation of compassion on this network. To investigate these questions we assessed brain activity using fMRI while novice and expert meditation practitioners generated a loving-kindness-compassion meditation state. To probe affective reactivity, we presented emotional and neutral sounds during the meditation and comparison periods. Our main hypothesis (...) was that the concern for others cultivated during this form of meditation enhances affective processing, in particular in response to sounds of distress, and that this response to emotional sounds is modulated by the degree of meditation training. The presentation of the emotional sounds was associated with increased pupil diameter and activation of limbic regions (insula and cingulate cortices) during meditation (versus rest). During meditation, activation in insula was greater during presentation of negative sounds than positive or neutral sounds in expert than it was in novice meditators. The strength of activation in insula was also associated with self-reported intensity of the meditation for both groups. These results support the role of the limbic circuitry in emotion sharing. The comparison between meditation vs. rest states between experts and novices also showed increased activation in amygdala, right temporo-parietal junction (TPJ), and right posterior superior temporal sulcus (pSTS) in response to all sounds, suggesting, greater detection of the emotional sounds, and enhanced mentation in response to emotional human vocalizations for experts than novices during meditation. Together these data indicate that the mental expertise to cultivate positive emotion alters the activation of circuitries previously linked to empathy and theory of mind in response to emotional stimuli.. (shrink)

This paper juxtaposes Asian spiritual narratives on meditation alongside medical and scientific narratives that emphasize meditation's efficacy in mitigating distress and increasing well-being. After proposing a working definition of meditation that enables it usefully to be distinguished from categories of similar practices such as prayer, I examine meditation's role in Mind/Body medicine in the West. Here, I survey a number of scientific studies of meditation, including the work of Dr. Herbert Benson and his colleagues who examine a meditational variant they (...) call the ‘Relaxation Response', to examine the breadth of efficacy claims made on behalf of the complex and multidimensional grouping of diverse practices we have come to as ‘meditation'. Among other positive outcomes, meditation has been credited with reducing blood pressure, anxiety, addiction, and stress, while Relaxation Response has been shown to decrease sympathetic nervous system activity, metabolism, pain, anxiety, depression, hostility, and stress. I conclude the paper by suggesting that findings from cognitive neuroscience on the subject of visual imagery can be used to elucidate genres of meditative practice that focus on internal visualization sequences, and I use practices from the Rnying ma tradition of Tibetan Buddhism to illustrate why certain integral aspects of meditation forever will remain beyond scientific grasp. (shrink)