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181.
Jeremy D. Schmahmann 《Neuropsychology review》2010,20(3):236-260
The cognitive neuroscience of the cerebellum is now an established multidisciplinary field of investigation. This essay traces
the historical evolution of this line of inquiry from an emerging field to its current status, with personal reflections over
almost three decades on this journey of discovery. It pays tribute to early investigators who recognized the wider role of
the cerebellum beyond motor control, traces the origins of new terms and concepts including the dysmetria of thought theory,
the universal cerebellar transform, and the cerebellar cognitive affective syndrome, and places these developments within
the broader context of the scientific efforts of a growing community of cerebellar cognitive neuroscientists. This account
considers the converging evidence from theoretical, anatomical, physiological, clinical, and functional neuroimaging approaches
that have resulted in the transition from recognizing the cerebellar incorporation into the distributed neural circuits subserving
cognition and emotion, to a hopeful new era of treatment of neurocognitive and neuropsychiatric manifestations of cerebellar
diseases, and to cerebellar-based interventions for psychiatric disorders. 相似文献
182.
Michael Browning Emily A. Holmes Catherine J. Harmer 《Cognitive, affective & behavioral neuroscience》2010,10(1):8-20
A negative bias in the deployment of attention to emotional stimuli is commonly found in both anxiety and depression. Recent
work has highlighted that such biases are causally related to emotional vulnerability, suggesting that interventions that
ameliorate them may be therapeutic. Here, we review the evidence that attentional bias can be modified using both pharmacological
and psychological interventions. We highlight the behavioral and neuroimaging studies that suggest that these interventions
impact upon attention via alteration of distinct neural mechanisms. Specifically, pharmacological interventions appear to
influence the initial deployment of attention via an effect on the amygdala-based stimulus appraisal system, whereas psychological
interventions influence attention at later time points and may alter activity in the lateral prefrontal cortex. Finally, we
suggest a conceptual framework that embraces both pharmacological and psychological approaches and consider the possible implications
of this work for future research and treatment development. 相似文献
183.
Two psychophysical experiments are reported, one dealing with the visual perception of the head orientation of another person (the 'looker') and the other dealing with the perception of the looker's direction of eye gaze. The participant viewed the looker with different retinal eccentricities, ranging from foveal to far-peripheral viewing. On average, judgments of head orientation were reliable even out to the extremes of peripheral vision (90 degrees eccentricity), with better performance at the extremes when the participant was able to view the looker changing head orientation from one trial to the next. In sharp contrast, judgments of eye-gaze direction were reliable only out to 4 degrees eccentricity, signifying that the eye-gaze social signal is available to people only when they fixate near the looker's eyes. While not unexpected, this vast difference in availability of information about head direction and eye direction, both of which can serve as indicators of the looker's focus of attention, is important for understanding the dynamics of eye-gaze behavior. 相似文献
184.
Richard E. Pastore Jesse D. Flint Jeremy R. Gaston Matthew J. Solomon 《Attention, perception & psychophysics》2008,70(1):13-29
There is a small but growing literature on the perception of natural acoustic events, but few attempts have been made to investigate complex sounds not systematically controlled within a laboratory setting. The present study investigates listeners’ ability to make judgments about the posture (upright—stooped) of the walker who generated acoustic stimuli contrasted on each trial. We use a comprehensive three-stage approach to event perception, in which we develop a solid understanding of the source event and its sound properties, as well as the relationships between these two event stages. Developing this understanding helps both to identify the limitations of common statistical procedures and to develop effective new procedures for investigating not only the two information stages above, but also the decision strategies employed by listeners in making source judgments from sound. The result is a comprehensive, ultimately logical, but not necessarily expected picture of both the source—sound—perception loop and the utility of alternative research tools. 相似文献
185.
This study hypothesized that perceived similarity significantly impacts depressed affect contagion only for individuals with highly interdependent self-construals. Baseline self-construal and affect were measured. Then, after reading a vignette about a depressed or nondepressed target, affect and perceived similarity were assessed. Participants reading the depressed vignette reported higher negative affect than participants reading the nondepressed vignette. Positive affect did not differ between the two conditions. For participants exposed to the depressed vignette, the hypothesized interaction between perceived similarity and interdependence significantly predicted positive affect. It appears that participants with more interdependent self-construals were more likely to "catch" the low positive affect displayed by the depressed target only if they perceived themselves as highly similar to the target. 相似文献
186.
Meites TM Deveney CM Steele KT Holmes AJ Pizzagalli DA 《Behaviour research and therapy》2008,46(9):1078-1084
Cognitive theories of depression posit that automatically activated cognitive schemas, including negative thoughts about the self and the future, predispose individuals to develop depressive disorders. However, prior research has largely examined these constructs using explicit tests in currently depressed individuals. Using the Implicit Association Test (IAT), the present study examined automatic associations between the self and mood state ("depression IAT") and between the future and mood state ("hopelessness IAT") before and after a negative mood induction in 19 remitted depressed individuals and 23 healthy controls. In the depression IAT, remitted depressed participants exhibited an overall lower tendency to associate themselves with happiness relative to the healthy controls before the mood induction. Control, but not remitted depressed, participants' automatic associations between the self and happiness diminished following the mood induction. Contrary to our hypotheses, no significant findings emerged when considering the hopelessness IAT. Consistent with prior studies, no significant correlations emerged between implicit and explicit biases, suggesting that these measures probe different processes. Results extend prior IAT research by documenting the presence of a reduced tendency to associate the self with happiness in a sample at increased risk for depression. 相似文献
187.
Prospective and positive mental imagery deficits in dysphoria 总被引:1,自引:0,他引:1
We know less about positive mental imagery than we do about negative mental imagery in depression. This study examined the relationship between depressed mood and the subjective experience of emotion in imagined events; specifically, prospective imagery, and imagery in response to emotionally ambiguous stimuli. One hundred and twenty-six undergraduates completed measures of depression, imagery vividness for future events, and a homograph interpretation task in which they generated images and subsequently rated image pleasantness and vividness. As predicted, compared to low dysphoria, high dysphoria was associated with poorer ability to vividly imagine positive (but not negative) future events. These findings were augmented by the observation that high dysphorics provided lower pleasantness ratings of images generated in response to homographs they interpreted as positive. We suggest that an imbalance in the inability to vividly imagine positive but not negative future events may curtail the ability of high dysphorics to be optimistic. High dysphoric individuals are further disadvantaged: even when they interpret ambiguity positively, the resulting images they generate are associated with less positive affect. Therapeutic strategies that address both such positive-specific imagery biases hold promise for depression treatment innovation. 相似文献
188.
Imagery and observation are multicomponential, involving individual difference characteristics that modify the processes. The authors propose that both imagery and observation function by offering effective routes to access and reinforce neural networks for skilled performance. The neural isomorphism with overt behaviors offers a tempting mechanism to explain the beneficial outcomes of the 2 processes. However, several limitations related to imagery indicate the possibility that imagery may not be as efficacious as the literature would indicate. The authors propose observation-based approaches to offer more valid and effective techniques in sport psychology and motor control. 相似文献
189.
The experimenters examine upper limb movement discrimination performance in an arm-raising task for bilateral associations of low-level unilateral performance. On a cue from the experimenter, young adults (n = 23) with no history of shoulder injury raised either their left arm, right arm, or both together in a forward flexion movement until their hand or hands contacted an unseen, adjustable, overhead stop. The participant then judged which of the 5 possible stop positions, in the 12-20 degrees range forward of true vertical, the participant had contacted on the particular trial. Results showed that for the 16 participants whose best performance was in 1 of the unimanual conditions discrimination scores in the bilateral condition were equivalent to those of their worse-performing limb. For the 7 participants whose best discrimination performance was obtained on bimanual arm-raising, scores for the 2 unimanual conditions were equivalently low. Therefore, when a single limb that can perform well operates in conjunction with a limb performing at a lower level, the consequence is lowering the bimanual movement discrimination performance. 相似文献
190.