The effect of chronic low back pain on tactile suppression during back movements

The aim of the present study was to examine whether tactile suppression, the phenomenon whereby tactile perception is suppressed during movement, would occur in the context of back movements. Of particular interest, it was investigated if tactile suppression in the back would be attenuated in those suffering from chronic low back pain. Individuals with chronic low back pain (N = 30) and a matched control group (N = 24) detected tactile stimuli on three possible locations (back, arm, chest) while performing a back or arm movement, or no movement. We hypothesized that the movements would induce tactile suppression, and that this effect would be largest for low-intense stimuli on the moving body part. We further hypothesized that, during back movements, tactile suppression on the back would be less pronounced in the chronic low back pain group than in the control group. The results showed the expected general tactile suppression effects. The hypothesis of back-specific attenuation of tactile suppression in the chronic low back pain group was not supported. However, back-specific tactile suppression in the chronic low back pain group was less pronounced in those who performed the back movements more slowly.     

Gaze following in the red-footed tortoise (Geochelone carbonaria)

Gaze following refers to the ability of an animal to orient its gaze direction to that of another organism. Such a behavior may be adaptive as it alerts the observer to important objects in the environment such as food or predators. This behavior has been shown in mammals and birds, but the evolutionary history and the distribution of this behavior throughout the animal kingdom remain unclear. Here, we show that a reptile, the red-footed tortoise (Geochelone carbonaria), is able to follow the gaze of a conspecific in a lookup task. Controls revealed that neither the mere presence of a conspecific nor the presentation of a light stimulus (without a demonstrator present) controlled the tortoises’ behavior. The findings indicate that the ability to follow gaze may be found in mammals, birds and reptiles and could have evolved before the amniotic line diverged, or may result from a general ability to learn.     

Radial-arm-maze behavior of the red-footed tortoise (Geochelone carbonaria)

The radial-arm maze is an established method for testing an animal's spatial win-shift behavior. Research on mammals, birds, and fish has shown that the mastery of this task is commonly mediated, to different degrees, by two types of strategy: those based on external cues and those based on response stereotypy. In the present study we trained four red-footed tortoises (Geochelone carbonaria) to navigate an eight-arm radial maze while providing different levels of access to visual room cues. The results indicate that response stereotypy is the more prevalent mechanism in these tortoises, although navigation based on landmarks can also occur if learned initially. The findings suggest that tortoise spatial navigation may be more similar to that observed in mammals and birds than previously thought.     

A dialogue on Zeno's paradox of Achilles and the tortoise

The five participants in this dialogue critically discuss Zeno of Elea's paradox of Achilles and the tortoise. They consider a number of solutions to and restatements of the paradox, together with their philosophical implications. Among the issues investigated include the appearance-reality distinction, Aristotle's distinction between actual and potential infinity, the concept of a continuum, Cantor's continuum hypothesis and theory of transfinite ordinals, and, as a solution to Zeno's puzzle, the distinction between infinite and indeterminate or inexhaustible divisibility.     

Looking back on Goffman: The excavation continues

I would like to thank Yves Winkin, Dean MacCannell, Charles Bosk, and review editor Jim Ostrow for providing helpful comments on several earlier drafts of this essay.     

The therapist with her back against the wall

This clinical paper describes once weekly psychotherapy with two boys with traumatic histories. The way in which the trauma enters the consulting room and the relationship with the therapist is explored. Technical issues are discussed, particularly the understanding of the countertransference and its modulation in communication with the patient. The therapist's intense personal anxiety about failure and about management of the difficulties that arise is linked to the impact of trauma.     

2004年中国道教界大事回顾

1月3日中国道教协会第六届会长闵智亭道长(1924-2004)逝世。1月7日福建同安南门天后宫举行重修落成暨开光仪式。2月5日河南嵩山中岳庙举行祭祀黄帝大典。3月2日台湾苗粟竹南镇中洪慈裕宫举行修建落成仪式。3月7日新加坡道教协会和香港蓬瀛仙馆联合主办的第四届道教音乐汇演在新加坡嘉龙剧院举行。4月10日上海枫泾施王庙在原址举行重建奠基仪式。4月19日“纪念魏华存诞辰1752周年”活动在河南沁阳神农山二仙庙举行。4月27日江苏苏州城隍庙举行维修竣工暨神像开光仪式,并获准对外开放。5月12日至15日首届“当代道教研讨会”在湖北武汉大学举行…     

Visual and response-based navigation in the tortoise (Geochelone carbonaria)

Much research has investigated spatial cognition in mammals and birds. Evidence suggests that the hippocampus plays a critical role in this; however, reptiles do not possess a hippocampus. It has been proposed that the reptilian medial cortex plays a similar role, yet little behavioral research has directly investigated this. Consequently, this study examined the role of extramaze cues in spatial navigation by the red-footed tortoise (Geochelone carbonaria) using an eight-arm radial maze. In Experiment 1 the maze was surrounded by a black curtain on which geometrical shapes were attached. After the tortoise reached above-chance performance we introduced test sessions in which the cues were removed. Performance was unaffected by cue removal. The tortoise appeared to have developed a “turn-by-one-arm” strategy. In a second experiment the curtain was removed and the tortoise was allowed access to a rich-cue environment. The use of the turn-by-one-arm strategy was significantly reduced and the tortoise appeared to be using the extramaze cues to navigate around the apparatus. This type of response-based strategy, and the specific contexts in which it was used, has not been observed in mammals and birds, suggesting that the mechanisms served by the reptilian medial cortex do not parallel exactly those of the hippocampus.     

Spatial learning and memory in the tortoise (Geochelone carbonaria)

A single tortoise (Geochelone carbonaria) was trained in an eight-arm radial maze, with the apparatus and general procedures modeled on those used to demonstrate spatial learning in rats. The tortoise learned to perform reliably above chance, preferentially choosing baited arms, rather than returning to arms previously visited on a trial. Test sessions that examined control by olfactory cues revealed that they did not affect performance. No systematic, stereotyped response patterns were evident. In spite of differences in brain structure, the tortoise showed spatial learning abilities comparable to those observed in mammals.     

When looking back to nothing goes back to nothing

Previous research showed that the eyes revisit the location in which the stimulus has been encoded when visual or verbal information is retrieved from memory. A recent study showed that this behavior still occurs 1 week after encoding, suggesting that visual, spatial and linguistic information is tightly associated with the oculomotor trace and stored as an integrated memory representation. However, it is yet unclear whether looking behavior simply remains stable between encoding and recall or whether it changes over time in a more fine-tuned manner. Here, we investigate the time course of looking behavior during recall in multiple sessions across 1 week. Participants encoded visual objects presented in one of the four locations on the computer screen. In five sessions during the week after encoding, they performed on a visual memory recall task. During retrieval, participants looked back to the encoding location, but only in the recall sessions within 1 day of encoding. We discuss different explanations for the temporal dynamics of looking behavior during recall, searching for the role of eye movements in memory.     

Madness strikes back

This commentary is concerned with the involvement of mental health service users in research. It will argue that research carried out by service users is one way of giving voice to a previously silenced group—the mad. It is one way in which ‘Madness Strikes Back’. The main theoretical model to be used is that of the early Foucault. I will not be concerned with what has become known as ‘Foucauldian discourse analysis’ since nowhere in Foucault's writing is there reference to conversation or talk. I will, however, be concerned with power as mental health service users are amongst the most disempowered of groups in all societies. I will also be concerned with Foucault's claim that, since the Enlightenment, madness has been positioned as the antithesis of reason, as ‘unreason’. This distinction can be argued to persist in the field of research. Copyright © 2008 John Wiley & Sons, Ltd.     

The perception of back vowels: Centre of gravity hypothesis

According to the formant centre of gravity (FCOG) hypothesis, two vowel formants in close proximity are merged during perceptual analysis, and their contribution to vowel quality depends on the centre of gravity of the formant cluster. Findings consistent with this hypothesis are that two formants can be replaced by a single formant of intermediate centre frequency, provided their separation is less than 3-3.5 Bark; and that changes in their relative amplitudes produce systematic shifts in vowel quality. In Experiment 1, listeners adjusted the frequencies of F1 and F2 in a synthesized 6-formant vowel (with the F1-F2 separation fixed at 250 Hz, i.e. less than 3 Bark) to find the best phonetic match to a reference vowel with modified formant amplitudes. Contrary to FCOG predictions, F2 attenuation did not produce lower frequency matches. Raising the amplitude of F2 led to predicted upward shifts in formant frequencies of the matched vowel, but with increased variability of matches for some stimuli. In Experiment 2, listeners identified synthesized vowels with a range of separations of F1 and F2. Formant amplitude manipulations had no effect on listeners' judgements when the fundamental frequency was low (125 Hz). Small shifts in vowel quality appeared for stimuli with a high fundamental (250 Hz), but the shifts were significantly larger for F1-F2 separations greater than 3.5 Bark. These effects of formant amplitude are qualitatively different from those observed with single-formant vowels and are generally incompatible with a formant-averaging mechanism.     

The MMPI in evaluation of functional versus organic low back pain

This paper reviews the research literature on MMPI assessment of functional versus organic low back pain (LBP). Research is described in three categories: (a) the relationship between psychopathology as measured by the MMPI and low back pain, (b) MMPI speciality scales, and (c) surgical outcomes. Research, to date, has suffered from methodological problems which has limited generalizations to clinical population. It is suggested, however, that the MMPI can be effectively used with LBP patients, but should not be the only data used in such assessments. Cautions are noted regarding use of the speciality scales.     

The affirmation of the scientist-practitioner. A look back at Boulder

In the aftermath of World War II, several influences were paramount in forcing academic psychology to recognize, albeit reluctantly, the coming professionalization of psychology. The federal government, wishing to avoid a repeat of blunders following World War I that led to significant dissatisfaction among veterans, took proactive steps to ensure that mental health needs of the new veterans would be met. The USPHS and the VA were mandated to expand significantly the pool of mental health practitioners, a direction that led not only to the funding of the Boulder conference but also to the development of APA's accreditation program, funded practical and internship arrangements with the VA, and the USPHS grants to academic departments for clinical training. The GI Bill, amended to include payment for graduate education, created tremendous interest in graduate programs in psychology. As a result, psychology programs were inundated with funded applicants, most of whom were interested in the application of psychology to clinical and other applied fields. Graduate psychology departments were mixed in their views of this "blessing." The reality of a separate curriculum for professional training in psychology was a bitter pill for some academic psychologists to swallow. Graduate departments feared that control of their programs would be taken over by external forces and that they would lose their right to determine their own curriculum. Further, they feared the domination of clinical training within their own departments and the effects of such educational emphasis on their traditional experimental programs. The Boulder conference brought together these disparate needs and concerns, although one can argue about how well some points of view were represented with respect to others. It was a time of high anticipation and fear. The conference could easily have ended in failure, with such diverse interests being unable to reach any consensus. There are many letters in the correspondence of committee members that suggest disagreements serious enough to prevent the development of any single model of training. Instead, by most yardsticks that one could apply, the conference succeeded, perhaps beyond the dreams of many of those in attendance who were most invested in a model for professional training. In evaluating the legacy of Boulder, several points are apparent. First, the conference succeeded because 73 individuals were able to agree to some 70 resolutions in 15 days, creating the scientist-practitioner model of professional training. Such consensus was arguably a remarkable achievement. The endorsement of the model by academic units followed with little evident resistance, although it is clear that some Boulder-model programs were developed that bore little resemblance to the model's insistence on significant training in both research and practice. Second, as a response to social and political needs, the conference was clearly a success. The cooperation of the APA, the USPHS, and the VA benefited all three entities. Clinical psychology was given the financial support and backing to advance it as a profession, and the federal government was able to begin the process of securing the personnel needed to address the mental health needs of the nation. The architects of Boulder were clear that their vision of training for professional psychology should be viewed as dynamic and experimental rather than fixed and prescribed. Certainly there are several variants of professional training extant today, yet the overwhelming majority of currently accredited programs in psychology label themselves as "Boulder-model" programs or "scientist-practitioner" programs. Still, new national conferences on professional training in psychology occur with some regularity as participants seek to resolve many of the same concerns debated by those at Boulder. The grand experiment goes on.     

Homo moralis strikes back

Restorative justice presents a morally relevant method for alternative conflict resolution. However, this potential is not always applied fully. Instead, the practice may be used in ways foreign to it. This claim comes to the fore in the practice of restorative justice in domestic violence cases. Despite the persistent feminist critique of it the practice is widely offered. This suggests that the practice can cater to needs not originally depicted in the rationale of it. This paper works out of a wittgensteinian approach and argues that there is a confusing language use going on around mediation. The argument is based on an analysis of public talk of mediation in Finland which shows that it is predominantly conducted in the light of homo economicus. This is problematic. The paper suggests that instead of referring to mediation in terms of homo economicus, the value of it should be counted in terms of homo moralis. This is what restorative justice originally intended to do. The paper establishes a new perspective on the critique of restorative justice in general and offers a fruitful way forward.