Selective attention has been shown to bias sensory processing in favor of relevant stimuli and against irrelevant or distracting stimuli in perceptual tasks. Increasing evidence suggests that selective attention plays an important role during working memory maintenance, possibly by biasing sensory processing in favor of to-be-remembered items. In the current study, we investigated whether selective attention may also support working memory by biasing processing against irrelevant and potentially distracting information. Event-related potentials (ERPs) were recorded while subjects (n = 22) performed a delayed-recognition task for faces and shoes. The delay period was filled with face or shoe distractors. Behavioral performance was impaired when distractors were congruent with the working memory domain (e.g., face distractor during working memory for faces) relative to when distractors were incongruent with the working memory domain (e.g., face distractor during shoe working memory). If attentional biasing against distractor processing is indeed functionally relevant in supporting working memory maintenance, perceptual processing of distractors is predicted to be attenuated when distractors are more behaviorally intrusive relative to when they are nonintrusive. As such, we predicted that perceptual processing of distracting faces, as measured by the face-sensitive N170 ERP component, would be reduced in the context of congruent (face) working memory relative to incongruent (shoe) working memory. The N170 elicited by distracting faces demonstrated reduced amplitude during congruent versus incongruent working memory. These results suggest that perceptual processing of distracting faces may be attenuated due to attentional biasing against sensory processing of distractors that are most behaviorally intrusive during working memory maintenance.
<p>Human beings can be proactive and engaged or, alternatively, passive and alienated, largely as a function of the social conditions in which they develop and function. Accordingly, research guided by self-determination theory has focused on the social–contextual conditions that facilitate versus forestall the natural processes of self-motivation and healthy psychological development. Specifically, factors have been examined that enhance versus undermine intrinsic motivation, self-regulation, and well-being. The findings have led to the postulate of three innate psychological needs—competence, autonomy, and relatedness—which when satisfied yield enhanced self-motivation and mental health and when thwarted lead to diminished motivation and well-being. Also considered is the significance of these psychological needs and processes within domains such as health care, education, work, sport, religion, and psychotherapy.</p>
OBJECTIVE: Although the efficacy of meditation interventions has been examined among adult samples, meditation treatment effects among youth are relatively unknown. We systematically reviewed empirical studies for the health-related effects of sitting-meditative practices implemented among youth aged 6 to 18 years in school, clinic, and community settings. METHODS: A systematic review of electronic databases (PubMed, Ovid, Web of Science, Cochrane Reviews Database, Google Scholar) was conducted from 1982 to 2008, obtaining a sample of 16 empirical studies related to sitting-meditation interventions among youth. RESULTS: Meditation modalities included mindfulness meditation, transcendental meditation, mindfulness-based stress reduction, and mindfulness-based cognitive therapy. Study samples primarily consisted of youth with preexisting conditions such as high-normal blood pressure, attention-deficit/hyperactivity disorder, and learning disabilities. Studies that examined physiologic outcomes were composed almost entirely of African American/black participants. Median effect sizes were slightly smaller than those obtained from adult samples and ranged from 0.16 to 0.29 for physiologic outcomes and 0.27 to 0.70 for psychosocial/behavioral outcomes. CONCLUSIONS: Sitting meditation seems to be an effective intervention in the treatment of physiologic, psychosocial, and behavioral conditions among youth. Because of current limitations, carefully constructed research is needed to advance our understanding of sitting meditation and its future use as an effective treatment modality among younger populations.
- Practices of Hindu Contemplation,
- Contemplation by Applied Subject,
- Contemplation by Tradition,
- Scientific Studies of Transcendental Meditation,
- Transcendental Meditation (TM),
- Psychiatry and Contemplation,
- Medical Research on Contemplative Practice,
- Mindfulness-Based Stress Reduction / Cognitive Therapy,
- Psychotherapy and Contemplation,
- K-12 Education and Contemplation,
- Health Care and Contemplation,
- Education and Contemplation,
- Hindu Contemplation
We used fMRI to examine amygdala activation in response to fearful facial expressions, measured over multiple scanning sessions. 15 human subjects underwent three scanning sessions, at 0, 2 and 8 weeks. During each session, functional brain images centered about the amygdala were acquired continuously while participants were shown alternating blocks of fearful, neutral and happy facial expressions. Intraclass correlation coefficients calculated across the sessions indicated stability of response in left amygdala to fearful faces (as a change from baseline), but considerably less left amygdala stability in responses to neutral expressions and for fear versus neutral contrasts. The results demonstrate that the measurement of fMRI BOLD responses in amygdala to fearful facial expressions might be usefully employed as an index of amygdala reactivity over extended periods. While signal change to fearful facial expressions appears robust, the experimental design employed here has yielded variable responsivity within baseline or comparison conditions. Future studies might manipulate the experimental design to either amplify or attenuate this variability, according to the goals of the research.
This project explores the integration of Zen Buddhist contemplative practices with practices entailed in academic, especially literary, reading. The mindfulness cultivated through Zen practices, and the ethical awareness that can spring from that mindfulness can inspire an academic reading practice that is both faithful to the particulars of a text’s form and sensitive to its ethical and political implications.
<p>Studied the different effects of yoga and psychomotor activity on a coding task, with 34 children referred to a learning center as Ss. They received a baseline period, a control period involving a fine motor task, an experimental treatment, another control period, a treatment reversal, and a control period. The results indicate that order of treatment had no effect on the results. Furthermore, coding scores in the 2nd half of the experiment were higher than those in the 1st half. There was no difference in the effect on performance of yoga and gross motor activities. Irrespective of which treatment was given, scores after treatment were significantly higher than those during the control periods. There are implications for physical education programming in elementary schools.</p>
BACKGROUND: Hypothalamic-pituitary-adrenal (HPA) system activation is adaptive in response to stress, and HPA dysregulation occurs in stress-related psychopathology. It is important to understand the mechanisms that modulate HPA output, yet few studies have addressed the neural circuitry associated with HPA regulation in primates and humans. Using high-resolution F-18-fluorodeoxyglucose positron emission tomography (FDG-PET) in rhesus monkeys, we assessed the relation between individual differences in brain activity and HPA function across multiple contexts that varied in stressfulness. METHODS: Using a logical AND conjunctions analysis, we assessed cortisol and brain metabolic activity with FDG-PET in 35 adolescent rhesus monkeys exposed to two threat and two home-cage conditions. To test the robustness of our findings, we used similar methods in an archival data set. In this data set, brain metabolic activity and cortisol were assessed in 17 adolescent male rhesus monkeys that were exposed to three stress-related contexts. RESULTS: Results from the two studies revealed that subgenual prefrontal cortex (PFC) metabolism (Brodmann's area 25/24) consistently predicted individual differences in plasma cortisol concentrations regardless of the context in which brain activity and cortisol were assessed. CONCLUSIONS: These findings suggest that activation in subgenual PFC may be related to HPA output across a variety of contexts (including familiar settings and novel or threatening situations). Individuals prone to elevated subgenual PFC activity across multiple contexts may be individuals who consistently show heightened cortisol and may be at risk for stress-related HPA dysregulation.
The specific aim of this course is development of a university dance curriculum that will link post-modern dance with Tai Chi as it is understood and practiced by the masters of the discipline in China – both as a practice (i.e., as a set of physical movements known as “Tai Chi Chuan”) and as a spiritual discipline (i.e., “Tai Chi”) worthy of scholarly study. A central hypothesis of this course is that the teaching of Tai Chi Chuan in this country – both in academic and experiential contexts – has generally missed the essence of the actual Chinese discipline by concentrating more on the specific physical steps than on the deeper mental and spiritual principles from which it derives. A major goal of the course is to restore to the curriculum those important principles of employing certain meditation techniques that have not been taught here. The course will apply two central principles of Tai Chi in the context of dance: first, the goal of awareness, or softness, which is simply movement based on stillness; and second, the goal of relational physics, or the intention and orientation of the individual to the whole.
<p>There are a great many books now available describing the complex rituals and esoteric significance of the ancient practices of Buddhist tantra. But none take the friendly, helpful approach of Geshe Tashi Tsering’s Foundation of Buddhist Thought series. Understanding the many questions Westerners have upon first encountering tantra’s colorful imagery and veiled language, Geshe Tsering gives straight talk about deities, initiations, mandalas, and the various stages of tantric development. He even goes through a simple tantric compassion practice written by the Dalai Lama, using it to unpack the building blocks common to all such visualization techniques. Tantra is a fitting conclusion to the folksy and practical wisdom in the Foundation of Buddhist Thought series.</p>
<p>Few counseling programs directly address the importance of self-care in reducing stress and burnout in their curricula. A course entitled Mind/Body Medicine and the Art of Self-Care was created to address personal and professional growth opportunities through self-care and mindfulness practices (meditation, yoga, qigong, and conscious relaxation exercises). Three methods of evaluating this 15-week 3-credit mindfulness-based stress reduction (MBSR) course for counseling students indicated positive changes for students in learning how to manage stress and improve counseling practice. Students reported positive physical, emotional, mental, spiritual, and interpersonal changes and substantial effects on their counseling skills and therapeutic relationships. Information from a focus group, qualitative reports, and quantitative course evaluations were triangulated; all data signified positive student responses to the course, method of teaching, and course instructor. Most students reported intentions of integrating mindfulness practices into their future profession.</p>
<p>Explains the varying techniques for working with children in different age groups (from five to eighteen) and shows how the benefits of meditation can help in a range of ways: from relieving shyness, anxiety and tension to reducing hyperactivity, aggression and impatience.</p>
<p>Preparation for the role of therapist can occur on both professional and personal levels. Research has found that therapists are at risk for occupationally related psychological problems. It follows that self-care may be a useful complement to the professional training of future therapists. The present study examined the effects of one approach to self-care, Mindfulness-Based Stress Reduction (MBSR), for therapists in training. Using a prospective, cohort-controlled design, the study found participants in the MBSR program reported significant declines in stress, negative affect, rumination, state and trait anxiety, and significant increases in positive affect and self-compassion. Further, MBSR participation was associated with increases in mindfulness, and this enhancement was related to several of the beneficial effects of MBSR participation. Discussion highlights the potential for future research addressing the mental health needs of therapists and therapist trainees.</p>
We investigated the top-down influence of working memory (WM) maintenance on feedforward perceptual processing within occipito-temporal face processing structures. During event-related potential (ERP) recordings, subjects performed a delayed-recognition task requiring WM maintenance of faces or houses. The face-sensitive N170 component elicited by delay-spanning task-irrelevant grayscale noise probes was examined. If early feedforward perceptual activity is biased by maintenance requirements, the N170 ERP component elicited by probes should have a greater N170 amplitude response during face relative to house WM trials. Consistent with this prediction, N170 elicited by probes presented at the beginning, middle, and end of the delay interval was greater in amplitude during face relative to house WM. Thus, these results suggest that WM maintenance demands may modulate early feedforward perceptual processing for the entirety of the delay duration. We argue based on these results that temporally early biasing of domain-specific perceptual processing may be a critical mechanism by which WM maintenance is achieved.
We present a new tensor-based morphometric framework that quantifies cortical shape variations using a local area element. The local area element is computed from the Riemannian metric tensors, which are obtained from the smooth functional parametrization of a cortical mesh. For the smooth parametrization, we have developed a novel weighted spherical harmonic (SPHARM) representation, which generalizes the traditional SPHARM as a special case. For a specific choice of weights, the weighted-SPHARM is shown to be the least squares approximation to the solution of an isotropic heat diffusion on a unit sphere. The main aims of this paper are to present the weighted-SPHARM and to show how it can be used in the tensor-based morphometry. As an illustration, the methodology has been applied in the problem of detecting abnormal cortical regions in the group of high functioning autistic subjects.
BACKGROUND: EEG alpha power has been demonstrated to be inversely related to mental activity and has subsequently been used as an indirect measure of brain activation. The hypothesis that the thalamus serves as a neuronal oscillator of alpha rhythms has been supported by studies in animals, but only minimally by studies in humans. METHODS: In the current study, PET-derived measures of regional glucose metabolism, EEG, and structural MRI were obtained from each participant to assess the relation between thalamic metabolic activity and alpha power in depressed patients and healthy controls. The thalamus was identified and drawn on each subject's MRI. The MRI was then co-registered to the corresponding PET scan and metabolic activity from the thalamus extracted. Thalamic activity was then correlated with a 30-min aggregated average of alpha EEG power. RESULTS: Robust inverse correlations were observed in the control data, indicating that greater thalamic metabolism is correlated with decreased alpha power. No relation was found in the depressed patient data. CONCLUSIONS: The results are discussed in the context of a possible abnormality in thalamocortical circuitry associated with depression.
The information processing capacity of the human mind is limited, as is evidenced by the attentional blink-a deficit in identifying the second of two targets (T1 and T2) presented in close succession. This deficit is thought to result from an overinvestment of limited resources in T1 processing. We previously reported that intensive mental training in a style of meditation aimed at reducing elaborate object processing, reduced brain resource allocation to T1, and improved T2 accuracy [Slagter, H. A., Lutz, A., Greischar, L. L., Francis, A. D., Nieuwenhuis, S., Davis, J., et al. Mental training affects distribution of limited brain resources. PloS Biology, 5, e138, 2007]. Here we report EEG spectral analyses to examine the possibility that this reduction in elaborate T1 processing rendered the system more available to process new target information, as indexed by T2-locked phase variability. Intensive mental training was associated with decreased cross-trial variability in the phase of oscillatory theta activity after successfully detected T2s, in particular, for those individuals who showed the greatest reduction in brain resource allocation to T1. These data implicate theta phase locking in conscious target perception, and suggest that after mental training the cognitive system is more rapidly available to process new target information. Mental training was not associated with changes in the amplitude of T2-induced responses or oscillatory activity before task onset. In combination, these findings illustrate the usefulness of systematic mental training in the study of the human mind by revealing the neural mechanisms that enable the brain to successfully represent target information.
<p>Philosophers speak-or, rather, they respond to various forms of speaking that are handed to them. This book by one of our most distinguished philosophers focuses on the communicative aspect of philosophical thought. Peperzak's central focus is addressing: what distinguishes speaking or writing from rumination is their being directed by someone to someone. To be involved in philosophy is to be part of a tradition through which thinkers propose their findings to others, who respond by offering their own appropriations to their interlocutors.After a critical sketch of the conception of modern philosophy, Peperzak presents a succinct analysis of speaking, insisting on the radical distinction between speaking about and speaking to. He enlarges this analysis to history and tries to answer the question whether philosophy also implies a certain form of listening and responding to words of God. Since philosophical speech about persons can neither honor nor reveal their full truth, speaking and thinking about God is even more problematic. Meditation about the archaic Word cannot reach the Speaker unless it turns into prayer, or-as Descartes wrote-into a contemplation that makes the thinker consider, admire, and adore the beauty of God's immense light, as much as the eyesight of my blinded mind can tolerate."Thinking is a work of genuine and original scholarship which responds to the tradition of philosophical thinking with a critique of its language, style, focus, and scope.-Catriona Hanley, Loyola College, Maryland</p>
<p>An English translation of a guide to the practice of the Sakya (sa skya) preliminaries (sngon 'gro). The Tibetan title is _Lam 'bras sngon 'gro'i khrid yig snang gsum mdzes rgyan_. (BJN)</p>