Parallel neural pathways control sodium consumption and taste valence.

The hedonic value of salt fundamentally changes depending on the internal state. High concentrations of salt induce innate aversion under sated states, whereas such aversive stimuli transform into appetitive ones under sodium depletion. Neural mechanisms underlying this state-dependent salt valence switch are poorly understood. Using transcriptomics state-to-cell-type mapping and neural manipulations, we show that positive and negative valences of salt are controlled by anatomically distinct neural circuits in the mammalian brain. The hindbrain interoceptive circuit regulates sodium-specific appetitive drive , whereas behavioral tolerance of aversive salts is encoded by a dedicated class of neurons in the forebrain lamina terminalis (LT) expressing prostaglandin E2 (PGE2) receptor, Ptger3. We show that these LT neurons regulate salt tolerance by selectively modulating aversive taste sensitivity, partly through a PGE2-Ptger3 axis. These results reveal the bimodal regulation of appetitive and tolerance signals toward salt, which together dictate the amount of sodium consumption under different internal states.

'It provided me with a sense of safety that I hadn't felt in weeks.' A qualitative case study of service users' experiences with sensory rooms in psychiatric inpatient units.

INTRODUCTION: Sensory rooms are environments designed to provide sensory input to help service users regulate arousal and manage distress. Sensory rooms are widely implemented in psychiatric inpatient units, but limited knowledge exists on how the sensory rooms are perceived by those who use them. This study investigated service users' experiences with sensory rooms during admission. METHODS: A qualitative case study using semi-structured interviews conducted with 20 participants, admitted in acute, intensive, and open inpatient psychiatric units in Copenhagen, Denmark. Participants used the sensory rooms under guidance from occupational therapists or physiotherapists and were subsequently interviewed about their experiences. Interviews were transcribed and subjected to thematic analysis. RESULTS: Participants reported that being in the sensory rooms helped them to reconnect to their body and to experience peace of mind. Over time, participants used the sensory approaches to develop self-management strategies and enable participation in activities. CONCLUSION: This study concludes that most of the participants had a positive experience in the sensory room under guidance from one of the unit's physio or occupational therapists. Participants experienced increased physical and mental calmness in the sensory room and an increased sense of safety which made a difference during their admission and, for several of them, also in terms of their expectations for everyday life following their discharge.

The Effect of Neurodevelopmental Disorders Characteristics on Aspects of Social Functioning.

AIM: The purpose of this study was to estimate the extent to which neurodevelopmental disorders (NDD's) symptoms (motor, sensory, attention and executive function) are associated with aspects of social function among school aged children. METHODS: This cross-sectional study included 39 children aged 6-9 years old (71.8% boys) who were referred to child development centers due to motor, sensory, and/or cognitive difficulties. The parents completed NDD's symptoms questionnaires: Developmental Coordination Disorder Questionnaire; Child Sensory Profile-2; Attention Deficit Hyperactive Disorder (ADHD) Rating Scale and the Behavior Rating Inventory of Executive Function. They also completed the Social Skills Improvement System and a social participation measure. RESULTS: Analysis demonstrated low to moderate correlations between social functioning aspects and the majority of NDD's symptoms. Executive functioning was the only predictor of social skills and social participation and accounted for most of the variability of behavioral problems, alongside a small contribution of ADHD symptoms. CONCLUSION: The findings contribute to the accumulating body of knowledge regarding social abilities of children with NDD's and suggest new information as to the effect of executive functions in this domain. Along with conducting a routine evaluation of social skills among children suspected to have NDD's, executive functions should also be comprehensively evaluated.

Participation in health promoting occupations among mothers of children aged 3-8 years with and without difficulties in sensory processing.

INTRODUCTION: Participation in personally significant occupations often contributes to quality of life. Parenting a child with difficulties in sensory processing may present challenges that can affect subjective and objective components of parental participation, thus possibly decreasing their quality of life. This study aimed to compare these components between mothers of children with and without difficulties in sensory processing and explore their relationship with maternal quality of life. METHODS: Seventy mothers of children aged 3-8 years with (50%) and without difficulties in sensory processing completed questionnaires measuring subjective occupational experience, objective frequency of participation in health promoting activities, and quality of life. No consumer or community involvement occurred. RESULTS: Satisfaction with participation competence as well as objective frequency of participation in health promoting activities among mothers from the study group was found to be significantly lower than the control group. Additionally, a significant moderately strong correlation was found between these variables and the quality of life of all mothers. CONCLUSIONS: Subjective and objective participation in health promoting activities is lower in mothers of children with difficulties in sensory processing. Additionally, the quality of life in all mothers was linked to their perceived capability and frequency of engagement in health-promoting activities. Raising awareness to the experience of mothers of children with challenges in sensory processing may help bring to attention the importance of enhancing mothers' engagement in health-promoting activities. PLAIN LANGUAGE SUMMARY: Mothering a child with difficulties in sensory processing can influence parents' emotional states and sense of competence, affecting how mothers take part in activities that support their health and quality of life. In this study, 70 mothers of children aged 3-8, with and without difficulties in sensory processing, were asked about how often they participate in activities that promote their health, their experiences, and about their quality of life. The mothers of children with difficulties in sensory processing felt less confident in their abilities and did fewer activities that support their health. Also, in all the mothers, their quality of life was related to how competent they feel and how often they performed these types of activities. This shows how important it is to support mothers of children with sensory processing difficulties helping them feel confident and join in activities that support their health. It is a reminder that family-focussed intervention is key to making sure mothers are doing well too.

Sensory processing in children with Paediatric Acute-onset Neuropsychiatric Syndrome.

INTRODUCTION: Previous research indicates that children with Paediatric Acute-onset Neuropsychiatric Syndrome (PANS) experience sensory reactivity differences that impact occupational performance. The purpose of this study was to determine whether there are differences in sensory reactivity in these children across two different time points; during exacerbation and during remission, using the Sensory Processing Measure (SPM) Home-Form. The study also sought to investigate whether children with PANS experience sensory differences during remission periods, when compared with SPM Home-Form norms. METHODS: A two-period bidirectional case-crossover design was used, and an online assessment was conducted to measure sensory reactivity. Parents of children aged 4.6 to 13.1 years with a diagnosis of PANS were recruited from various sites across Australia, USA, England, Ireland, Scotland, Canada, and New Zealand. The SPM Home-Form was used to measure sensory reactivity at two time points, when PANS was in remission (T-R) and in exacerbation (T-E). Study entry was permitted at either T-E or T-R. Participant exacerbation status was monitored over a maximum 12-month period, and a follow-up SPM Home-Form was sent when a change in exacerbation status was indicated. A linear mixed model was used to assess the difference between SPM Home-Form norm-referenced scores during exacerbation and remission. RESULTS: The study included 82 participants, with 80 providing data at study entry, and 27 providing data at follow-up. Results showed a statistically significant decline in performance across the SPM Home-Form domains of Hearing, Social Participation, Planning and Ideas, and Total Sensory Systems T-scores during exacerbation when compared with remission data. Results also demonstrated atypical sensory reactivity across Vision, Hearing, Touch, Balance and Motion, and Total Sensory Systems domains during periods of remission compared with SPM Home-Form norms. CONCLUSION: This study found that children with PANS experience significant sensory reactivity differences during exacerbation and remission across multiple sensory domains, with a decline in performance during exacerbation. Where there are occupational performance challenges, occupational therapists should consider administering sensory assessments so that effective intervention plans addressing the unique sensory reactivity needs of children with PANS can be developed.

Sensory Modulation among Kindergarten Children in Jordan Based on Parents' Perceptions.

This study aimed to explore sensory processing abilities in kindergarten children based on parents' perceptions of their children's sensory functioning. Employing a non-probability sampling technique, parents of 957 typical kindergarteners (52% males, 48% females) aged between four and six years in Amman-Jordan were surveyed via Arabic-Short Sensory Profile (A-SSP). Results showed that 37% and 24% of children exhibited definite difference and probable difference, respectively. These proportions indicate the importance of including sensory processing as a variable in studies that target children typical development, and to support the development of sensory processing among Jordanian children.

[Soothing spaces and techniques in psychiatry]. / Espaces et techniques d'apaisement en psychiatrie.

The development of alternatives to seclusion and restraint is a priority for psychiatric care services. Among them, the implementation of soothing spaces is currently experiencing considerable growth.

Neurofeedback Therapy for Sensory Over-Responsiveness-A Feasibility Study.

Background: Difficulty in modulating multisensory input, specifically the sensory over-responsive (SOR) type, is linked to pain hypersensitivity and anxiety, impacting daily function and quality of life in children and adults. Reduced cortical activity recorded under resting state has been reported, suggestive of neuromodulation as a potential therapeutic modality. This feasibility study aimed to explore neurofeedback intervention in SOR. Methods: Healthy women with SOR (n = 10) underwent an experimental feasibility study comprising four measurement time points (T1­baseline; T2­preintervention; T3­postintervention; T4­follow-up). Outcome measures included resting-state EEG recording, in addition to behavioral assessments of life satisfaction, attaining functional goals, pain sensitivity, and anxiety. Intervention targeted the upregulation of alpha oscillatory power over ten sessions. Results: No changes were detected in all measures between T1 and T2. Exploring the changes in brain activity between T2 and T4 revealed power enhancement in delta, theta, beta, and gamma oscillatory bands, detected in the frontal region (p = 0.03−<0.001; Cohen's d = 0.637−1.126) but not in alpha oscillations. Furthermore, a large effect was found in enhancing life satisfaction and goal attainment (Cohen's d = 1.18; 1.04, respectively), and reduced pain sensitivity and anxiety trait (Cohen's d = 0.70). Conclusion: This is the first study demonstrating the feasibility of neurofeedback intervention in SOR.

Voluntary Actions Modulate Perception and Neural Representation of Action-Consequences in a Hand-Dependent Manner.

Evoked neural activity in sensory regions and perception of sensory stimuli are modulated when the stimuli are the consequence of voluntary movement, as opposed to an external source. It has been suggested that such modulations are due to motor commands that are sent to relevant sensory regions during voluntary movement. However, given the anatomical-functional laterality bias of the motor system, it is plausible that the pattern of such behavioral and neural modulations will also exhibit a similar bias, depending on the effector triggering the stimulus (e.g., right/left hand). Here, we examined this issue in the visual domain using behavioral and neural measures (fMRI). Healthy participants judged the relative brightness of identical visual stimuli that were either self-triggered (using right/left hand button presses), or triggered by the computer. Stimuli were presented either in the right or left visual field. Despite identical physical properties of the visual consequences, we found stronger perceptual modulations when the triggering hand was ipsi- (rather than contra-) lateral to the stimulated visual field. Additionally, fMRI responses in visual cortices differentiated between stimuli triggered by right/left hand. Our findings support a model in which voluntary actions induce sensory modulations that follow the anatomical-functional bias of the motor system.

Development, reliability, and validity of the Sensory Adventure Measure.

INTRODUCTION: Sensory modulation refers to a condition in which an individual's behavioural responses to sensory stimuli do not correspond to the nature or intensity of the stimuli. Sensory modulation affects children's participation in everyday activities and their well-being. The most common assessments used are caregiver questionnaires. Our aim is twofold; first to develop a clinical evaluative measure, the Sensory Adventure Measure (SAM), for directly assessing sensory modulation in children via therapists and children's self-report, second, we aim to establish its reliability and validity. METHODS: The study sample comprised 87 children ranging in age from 4 to 6 years and 11 months old divided into two groups: study group included 63 children with mild developmental disabilities and the control group included 24 typically developed children. The SAM's internal consistency, test-retest reliability, and inter-rater reliability were examined. In addition, criterion validity was established using the total score of the Short Sensory Profile (SSP) and construct validity was established by known group differences. RESULTS: The SAM exhibited good internal consistency (α = 0.83, 0.85) and moderate to very good test-retest reliability (r = 0.96, 0.98, 0.75). Inter-rater reliability was strong (r = 0.80-0.83). Moderate correlation was found between the SAM Therapist Rating of Magnitude total score and the total score of the SSP and significant differences were found in the SAM scores between groups thus establishing validity. CONCLUSIONS: The SAM demonstrated good psychometric properties and can be used as a reliable and valid measure to assess sensory modulation among children aged 4 to 6 years. The SAM can be used by therapists to assess sensory modulation disorder based on observed responses to sensory stimuli and the child's self-report. The SAM contributes additional perspective to the evaluation process of sensory modulation disorder.

Differential neural processing of spontaneous blinking under visual and auditory sensory environments: An EEG investigation of blink-related oscillations.

Blink-related oscillations (BROs) are a recently discovered neurophysiological response associated with spontaneous blinking, distinct from the well-known oculomotor and visual suppression effects. BROs strongly activate the bilateral precuneus along with other cortical regions involved in visuospatial processing and associative episodic memory, and are believed to represent environmental monitoring processes that occur following blink-induced visual interruptions. Although these responses have been reported across multiple imaging modalities under both resting and cognitive loading conditions, it is yet unknown whether these responses also exist under external sensory stimulation conditions. To address this, we investigated BRO responses in healthy adults using 64-channel electroencephalography (EEG), while participants underwent passive external auditory and visual stimulation. Our results showed that BRO responses are present under both auditory and visual stimulation conditions (p â€‹< â€‹0.05), with similar temporal and spectral features compared to rest. However, visual stimulation did result in decreased BRO amplitude compared to auditory and resting conditions (p â€‹< â€‹0.05), suggesting decreased neuronal resources for processing blink-related information in the visual but not auditory environment. There were also additional pre-blink spectral changes in the visual condition compared to rest (p â€‹< â€‹0.05), which suggest that passive visual stimulation induces neural preparatory processes occurring in anticipation of the upcoming blink event. Together, these findings provide new and compelling evidence that blink-related neural processes are modulated not only by the internal cognitive loading due to simultaneous task demands, but also by competing external sensory requirements. This highlights the link between blinking and cognition, and further demonstrates the importance of BROs as a new window into brain function.

Perceived Sensitivity to Pain and Responsiveness to Non-noxious Sensation in Substance Use Disorder.

OBJECTIVE: This comparative cross-sectional study aimed to characterize individuals with substance use disorder (SUD) in self-perception of pain sensitivity, experimental auditory aversiveness, and non-noxious sensory responsiveness, as well as examine the associations with SUD. METHODS: Therapeutic community (TC) individuals with SUD (N = 63, male 88.9%) and healthy controls (N = 60, male 86.7%) completed the Pain Sensitivity Questionnaire (PSQ) and the Sensory Responsiveness Questionnaire-Intensity Scale (SRQ-IS), followed by a psychophysical auditory battery, the Battery of Averseness to Sounds (BAS)-Revised. RESULTS: The SUD group scored higher on the PSQ (P < 0.0001), BAS-R aversiveness (P < 0.0001), BAS-R-unpleasantness (P < 0.0001), and on the aftersensation of auditory aversiveness (P < 0.0001) and unpleasantness (P < 0.000). Fifty-four percent of the SUD group vs 11.7% of the control group were identified as having sensory modulation dysfunction (SMD; P < 0.0001). Logistic regression modeling revealed that the SRQ-IS-Aversive score had a stronger relationship, indicating a 12.6-times odds ratio for SUD (P = 0.0002). Finally, a risk score calculated from a linear combination of the logistic regression model parameters is presented based on the PSQ and SRQ. CONCLUSIONS: This is the first study to explore sensory and aversive domains using experimental and self-reporting in situ, revealing pain perception alteration that co-occurs with high prevalence of SMD, specifically of the over-responsive type. Findings may be significant in clinical practice for treating pain, and for expanding therapeutic modalities as part of broader rehabilitation in TC and beyond, to better meet personalized therapy.

Impaired early information processing in adult ADHD: a high-density ERP study.

BACKGROUND: Children with attention-deficit/hyperactivity disorder (ADHD) often demonstrate sensory processing difficulties in the form of altered sensory modulation, which may contribute to their symptomatology. Our objective was to investigate the neurophysiological correlates of sensory processing deficits and the electrophysiological characteristics of early information processing in adult ADHD, measured by the P1 event-related potential (ERP). METHODS: We obtained ERPs during a Go/NoGo task from 26 adult patients with ADHD and 25 matched controls using a high-density 128-channel BioSemi ActiveTwo recording system. RESULTS: ADHD patients had a significantly reduced P1 component at occipital and inferotemporal scalp areas compared to controls. The reduction was associated with inattention and hyperactivity symptom severity, as measured by the Conners' Adult ADHD Rating Scale. ADHD patients with higher inattention scores had significantly smaller P1 amplitudes at posterior scalp sites, while higher hyperactivity scores were associated with higher P1 amplitudes. CONCLUSIONS: Deficits in early sensory processing, as measured by the P1 ERP component, are present in adult ADHD patients and are associated with symptom severity. These findings are suggestive of bottom-up cognitive deficits in ADHD driven by impairments in early visual processing, and provide evidence that sensory processing problems are present at the neurophysiological level in this population.

Making sense of it together: Youth & families co-create sensory modulation assessment and intervention in community mental health settings to optimise daily life.

INTRODUCTION: Occupational therapists work collaboratively with young people experiencing mental ill-health to enable meaningful occupational participation in daily life. Sensory modulation is used as a means of developing self-regulation and enabling occupational participation. Published literature on sensory modulation in mental health settings is primarily located within acute inpatient settings and focuses on self-regulation. Little is known about the use of sensory modulation within community settings to enhance occupational participation in daily lives of people with mental-ill health. This study investigated the experiences of young people and their families who engaged in sensory modulation assessment (Adolescent/Adult Sensory Profile) and intervention (between one and twelve sessions) as part of community mental health care at a large area mental health service in Melbourne, Australia. METHODS: The qualitative study used naturalistic inquiry methodology involving semi-structured interviews with six young people and three families. Nine interview transcripts were thematically analysed to elicit the experiences of sensory modulation assessment and intervention, and how this may influence daily life. RESULTS: Thematic analysis revealed that young people and their families' positive experiences of sensory modulation were underpinned by processes of co-creation: (a) knowing yourself; (b) understanding 'the why': developing shared reasons for engaging in sensory modulation; (c) creating comfort; (d) creating connection; and (e) constantly learning. Sensory modulation supported occupational participation in young peoples' daily lives in the areas of sleep, study, relationships, self-care, independent living, being in the world, and doing new things. CONCLUSION: Young people and their families valued the process of co-creating sensory modulation assessment and intervention to enhance occupational participation. Results revealed that sensory modulation assessment and intervention was optimised when it was a process of co-creation. Future research should investigate the effectiveness of sensory modulation in enhancing occupational participation in these domains that influence daily life.

Expectations Do Not Alter Early Sensory Processing during Perceptual Decision-Making.

Two factors play important roles in shaping perception: the allocation of selective attention to behaviorally relevant sensory features, and prior expectations about regularities in the environment. Signal detection theory proposes distinct roles of attention and expectation on decision-making such that attention modulates early sensory processing, whereas expectation influences the selection and execution of motor responses. Challenging this classic framework, recent studies suggest that expectations about sensory regularities enhance the encoding and accumulation of sensory evidence during decision-making. However, it is possible, that these findings reflect well documented attentional modulations in visual cortex. Here, we tested this framework in a group of male and female human participants by examining how expectations about stimulus features (orientation and color) and expectations about motor responses impacted electroencephalography (EEG) markers of early sensory processing and the accumulation of sensory evidence during decision-making (the early visual negative potential and the centro-parietal positive potential, respectively). We first demonstrate that these markers are sensitive to changes in the amount of sensory evidence in the display. Then we show, counter to recent findings, that neither marker is modulated by either feature or motor expectations, despite a robust effect of expectations on behavior. Instead, violating expectations about likely sensory features and motor responses impacts posterior alpha and frontal theta oscillations, signals thought to index overall processing time and cognitive conflict. These findings are inconsistent with recent theoretical accounts and suggest instead that expectations primarily influence decisions by modulating post-perceptual stages of information processing.SIGNIFICANCE STATEMENT Expectations about likely features or motor responses play an important role in shaping behavior. Classic theoretical frameworks posit that expectations modulate decision-making by biasing late stages of decision-making including the selection and execution of motor responses. In contrast, recent accounts suggest that expectations also modulate decisions by improving the quality of early sensory processing. However, these effects could instead reflect the influence of selective attention. Here we examine the effect of expectations about sensory features and motor responses on a set of electroencephalography (EEG) markers that index early sensory processing and later post-perceptual processing. Counter to recent empirical results, expectations have little effect on early sensory processing but instead modulate EEG markers of time-on-task and cognitive conflict.

Neuroligin tuning of pharyngeal pumping reveals extrapharyngeal modulation of feeding in Caenorhabditis elegans.

The integration of distinct sensory modalities is essential for behavioural decision making. In Caenorhabditiselegans, this process is coordinated by neural circuits that integrate sensory cues from the environment to generate an appropriate behaviour at the appropriate output muscles. Food is a multimodal cue that impacts the microcircuits to modulate feeding and foraging drivers at the level of the pharyngeal and body wall muscle, respectively. When food triggers an upregulation in pharyngeal pumping, it allows the effective ingestion of food. Here, we show that a Celegans mutant in the single gene orthologous to human neuroligins, nlg-1, is defective in food-induced pumping. This was not due to an inability to sense food, as nlg-1 mutants were not defective in chemotaxis towards bacteria. In addition, we found that neuroligin is widely expressed in the nervous system, including AIY, ADE, ALA, URX and HSN neurons. Interestingly, despite the deficit in pharyngeal pumping, neuroligin was not expressed within the pharyngeal neuromuscular network, which suggests an extrapharyngeal regulation of this circuit. We resolved electrophysiologically the neuroligin contribution to the pharyngeal circuit by mimicking food-dependent pumping and found that the nlg-1 phenotype is similar to mutants impaired in GABAergic and/or glutamatergic signalling. We suggest that neuroligin organizes extrapharyngeal circuits that regulate the pharynx. These observations based on the molecular and cellular determinants of feeding are consistent with the emerging role of neuroligin in discretely impacting functional circuits underpinning complex behaviours.

Octopaminergic innervation and a neurohaemal release site in the antennal heart of the locust Schistocerca gregaria.

A detailed account is given by the octopaminergic innervation of the antennal heart in Schistocerca gregaria using various immunohistochemical methods. Anterograde axonal filling illustrates the unilateral innervation on the medial ventral surface of the pumping muscle of the antennal heart via the paired corpora cardiaca nerve III. In addition, antibody staining revealed that ascending axons of this nerve terminate at the ampullae of the antennal heart forming synaptoid structures and extensive neurohaemal release sites. Due to the innervation by two dorsal unpaired median neurons, the presence of the biogenic amines octopamine and tyramine could be visualized by immunocytochemistry in an insect antennal heart for the first time. The data suggest that tyramine acts as a precursor and not purely as an independent transmitter. While the octopaminergic fibers innervating the pumping muscle of the antennal heart indicate a cardioregulatory role, we conclude that octopamine released from the neurohaemal area is pumped into the antennae and an involvement in the modulation of the antennal sensory sensitivity is discussed.

Fear Spreading Across Senses: Visual Emotional Events Alter Cortical Responses to Touch, Audition, and Vision.

Attention and perception are potentiated for emotionally significant stimuli, promoting efficient reactivity and survival. But does such enhancement extend to stimuli simultaneously presented across different sensory modalities? We used functional magnetic resonance imaging in humans to examine the effects of visual emotional signals on concomitant sensory inputs in auditory, somatosensory, and visual modalities. First, we identified sensory areas responsive to task-irrelevant tones, touches, or flickers, presented bilaterally while participants attended to either a neutral or a fearful face. Then, we measured whether these responses were modulated by the emotional content of the face. Sensory responses in primary cortices were enhanced for auditory and tactile stimuli when these appeared with fearful faces, compared with neutral, but striate cortex responses to the visual stimuli were reduced in the left hemisphere, plausibly as a consequence of sensory competition. Finally, conjunction and functional connectivity analyses identified 2 distinct networks presumably responsible for these emotional modulatory processes, involving cingulate, insular, and orbitofrontal cortices for the increased sensory responses, and ventrolateral prefrontal cortex for the decreased sensory responses. These results suggest that emotion tunes the excitability of sensory systems across multiple modalities simultaneously, allowing the individual to adaptively process incoming inputs in a potentially threatening environment.

The benefits of sensory modulation on levels of distress for consumers in a mental health emergency setting.

OBJECTIVES: This paper reports a pilot study exploring the benefits of offering sensory modulation within a mental health emergency setting for consumers experiencing distress during a psychiatric presentation. METHODS: Seventy-four consumers with a mental health presentation reported on their sensory modulation use experiences during their stay in a South Australian tertiary teaching hospital emergency department. An evaluation form was used to document use of items, self-reported distress pre and post sensory modulation use, and other consumer experiences. RESULTS: Consumers used between one and six sensory items for a median duration of 45 min. There was a statistically significant reduction ( t(73) = 15.83, p < .001) in self-reported distress post sensory modulation use, and consumers also reported that use was helpful, distracting, calming and assisted in managing negative emotions and thoughts. CONCLUSIONS: The results demonstrate the potential value of sensory-based interventions in reducing behavioural and emotional dysregulation in an emergency setting whilst also promoting consumer self-management strategies.

Sensory Over-Responsiveness among Healthy Subjects is Associated with a Pronociceptive State.

OBJECTIVE: Chronic pain patients show hypersensitivity to sensory nonpainful stimuli. Sensory over-responsiveness (SOR) to innocuous daily stimuli, experienced as painful, is prevalent in 10% of the healthy population. This altered sensory processing may be an expression of overfacilitation, or a less efficient pain-inhibitory process in the pain pathways. We therefore aimed to investigate specifically the pain-inhibitory system of subjects with SOR who are otherwise healthy, not studied as of yet. METHODS: Thirty healthy subjects, divided into an SOR group (n = 14) and a non-SOR group (n = 16) based on responses to the Sensory Responsiveness Questionnaire, were psychophysically tested in order to evaluate (1) hyperalgesic responses; (2) adaptation/sensitization to 14 phasic heat stimuli; (3) habituation; (4) 6-minute after-sensations; and (5) conditioned pain modulation (CPM) (ie, phasic heat stimuli applied with and without hand immersion in a hot water bath). RESULTS: The SOR group differed from the non-SOR group in (1) a steeper escalation in NPS ratings to temperature increase (P = 0.003), indicating hyperalgesia; (2) increased sensitization (P < 0.001); (3) habituation responses (P < 0.001); (4) enhanced pain ratings during the after-sensation (P = 0.006); and (5) no group difference was found in CPM. CONCLUSIONS: SOR is associated with a pronociceptive state, expressed by amplification of experimental pain, yet with sufficient inhibitory processes. Our results support previous findings of enhanced facilitation of pain-transmitting pathways but also reveal preserved inhibitory mechanisms, although they were slower to react.