Synergistic influences of sensory and central stimuli on non-voluntary rhythmic arm movements

In recent years, neuromodulation of the cervical spinal circuitry has become an area of interest for investigating rhythmogenesis of the human spinal cord and interaction between cervical and lumbosacral circuitries, given the involvement of rhythmic arm muscle activity in many locomotor tasks. We have previously shown that arm muscle vibrostimulation can elicit non-voluntary upper limb oscillations in unloading body conditions. Here we investigated the excitability of the cervical spinal circuitry by applying different peripheral and central stimuli in healthy humans. The rationale for applying combined stimuli is that the efficiency of only one stimulus is generally limited. We found that low-intensity electrical stimulation of the superficial arm median nerve can evoke rhythmic arm movements. Furthermore, the movements were enhanced by additional peripheral stimuli (e.g., arm muscle vibration, head turns or passive rhythmic leg movements). Finally, low-frequency transcranial magnetic stimulation of the motor cortex significantly facilitated rhythmogenesis. The findings are discussed in the general framework of a brain-spinal interface for developing adaptive central pattern generator-modulating therapies.     

Influence of speed-related auditory feedback on braking in a 3D-driving simulator

Although discrete auditory stimuli have been found useful for emergency braking, the role of continuous speed-related auditory feedback has not been investigated yet. This point may though be of importance in electric vehicles in which acoustic cues are drastically changed. The present study addressed this question through two experiments. In experiment 1, 12 usual drivers were exposed to naturalistic auditory feedback mimicking those issued from electric cars, while facing dynamic visual scenes in a 3D driving simulator. After being passively travelled up to a sustained constant speed, subjects had to stop their car in front of a traffic light that unexpectedly turned to red. Modifications of the speed-related auditory feedback did not impact braking initiation and regulation. In experiment 2, synthesized auditory feedback based on the Shepard-Risset glissando was provided to a new sample of 15 usual drivers in the same task. Pitch variations of this acoustic stimulus, although not scaled to an absolute speed, were manipulated as a function of visual speed changes. Changing the mapping between pitch variations of the synthesized auditory feedback and visual speed changes induced adjustments on braking which depended on acceleration/deceleration feedback. These findings stressed the importance of the acoustic content and its dynamics for car speed control.     

短时记忆中的范畴组织和通道组织的比较

本文通过设置不同的线索条件对短时记忆中范畴组织和通道组织进行了比较研究。实验采用了通道线索组、范围线索组和混合线索组三种条件,并设置了五种词表比例。在通道线索组中,每个词表是同范畴字词,但一半用视觉呈现,一半用听觉呈现;在范畴线索组中,两类词分属两个不同的词义范畴,但以相同通道呈现;在混合线索组中,两类不同范畴的词,各有一半分别用视觉和听觉呈现。结果表明在三种线索条件下,ＡＲＣ分值差异显著,表现为     

Symmetry perception in the blind

Bilateral mirror symmetry, especially vertical symmetry, is a powerful phenomenon in spatial organization of visual shapes. However, the causes of vertical symmetry salience in visual perception are not completely clear. Here we investigated whether the perceptual salience of vertical symmetry depends on visual experience by testing a group of congenitally blind individuals in a memory task in which either horizontal or vertical symmetry was used as an incidental feature. Both blind and sighted subjects remembered more accurately configurations that were symmetrical compared to those that were not. Critically, whereas sighted subjects displayed a higher level of facilitation by vertical than horizontal symmetry, no such difference was found in the blind. This suggests that the perceptual salience of the vertical dimension is visually based.     

Effects of retrieval practice and presentation modality on verbal learning: testing the limits of the testing effect

ABSTRACT

The testing effect refers to improved memory after retrieval practice and has been researched primarily with visual stimuli. In two experiments, we investigated whether the testing effect can be replicated when the to-be-learned information is presented auditorily, or visually?+?auditorily. Participants learned Swahili-English word pairs in one of three presentation modalities – visual, auditory, or visual?+?auditory. This was manipulated between-participants in Experiment 1 and within-participants in Experiment2. All participants studied the word pairs during three study trials. Half of participants practiced recalling the English translations in response to the Swahili cue word twice before the final test whereas the other half simply studied the word pairs twice more. Results indicated an improvement in final test performance in the repeated test condition, but only in the visual presentation modality (Experiments 1 and 2) and in the visual?+?auditory presentation modality (Experiment 2). This suggests that the benefits of practiced retrieval may be limited to information presented in a visual modality.     

Peer Relationships and Emotional Well-Being of Children with Sickle Cell Disease: A Controlled Replication

This study investigated the effects of stimulus presentation modality on working memory performance in elementary school-age children ages 7–13. The experimental paradigm implemented a multitrial learning task incorporating three presentation modalities: Auditory, Visual, and simultaneous Auditory plus Visual. The first experiment compared the learning and memory performance of older and younger elementary school children. The second experiment compared verbal learning and memory performance in elementary school children with major depressive disorder (MDD) to the performance of nondepressed children. All participants benefited from the pictorial presentation of information during learning and recall of information as compared to the auditory presentation alone. Both age and socioeconomic status affected working memory performance in typically developing children. Children with depression demonstrated a more passive learning style during the auditory list acquisition. The present study supports the pictorial superiority hypothesis in verbal learning tasks and the theory that working memory matures during elementary school years. Furthermore, current results indicate that complex working memory measures are not entirely independent of previous experience.     

Beyond words: Sensory properties of depressive thoughts

Verbal thoughts (such as negative cognitions) and sensory phenomena (such as visual mental imagery) are usually conceptualised as distinct mental experiences. The present study examined to what extent depressive thoughts are accompanied by sensory experiences and how this is associated with symptom severity, insight of illness and quality of life. A large sample of mildly to moderately depressed patients (N = 356) was recruited from multiple sources and asked about sensory properties of their depressive thoughts in an online study. Diagnostic status and symptom severity were established over a telephone interview with trained raters. Sensory properties of negative thoughts were reported by 56.5% of the sample (i.e., sensation in at least one sensory modality). The highest prevalence was seen for bodily (39.6%) followed by auditory (30.6%) and visual (27.2%) sensations. Patients reporting sensory properties of thoughts showed more severe psychopathological symptoms than those who did not. The degree of perceptuality was marginally associated with quality of life. The findings support the notion that depressive thoughts are not only verbal but commonly accompanied by sensory experiences. The perceptuality of depressive thoughts and the resulting sense of authenticity may contribute to the emotional impact and pervasiveness of such thoughts, making them difficult to dismiss for their holder.     

A mixed-methods examination of autonomous sensory meridian response: Comparison to frisson

Autonomous Sensory Meridian Response (ASMR) is a pleasurable, head-oriented tingling sensation, typically induced by exposure to audiovisual triggers, producing feelings of relaxation and euphoria. This article explores the induction of ASMR experiences in a laboratory setting amongst non-specialised participants, as well as the relationship between ASMR and frisson, or ‘musical chills’. In previous work, the ASMR-15 was found to be a reliable measure of ASMR propensity, however, the predictive validity of the measure has yet to be determined. The aim of this study was to assess whether ASMR-15 scores predict greater ASMR induction in an experimental setting. To address this, N = 100 undergraduate psychology students completed the ASMR-15 and a measure of frisson, before viewing ASMR stimuli under controlled conditions. Mixed-methods analyses indicated the successful induction of ASMR amongst some participants, convergence between ASMR-15 scores and video ratings, as well as divergence between ASMR and frisson scores.     

A Review of Sensory Imagery for Consumer Psychology

This review of mental imagery research has the core objective of fostering more research on the topic of sensory imagery. The review is organized around a conceptual framework highlighting (a) how mental imagery is formed, (b) the elicitation and elaboration of mental imagery, (c) the multi-modal nature of sensory imagery, and (d) the consumer behavior consequences of mental imagery. This conceptual framework provides many new lenses through which researchers can view prior findings, and thereby motivates innovative new research ideas. Future research directions are provided in each section of the review, with additional unexplored opportunities presented in a final section.