Sensory integration, sensory processing, and sensory modulation disorders: putative functional neuroanatomic underpinnings

Relationship between sensory processing patterns and gross motor function of children and adolescents with Down syndrome and typical development: a cross-sectional study

BACKGROUND

Children and adolescents with Down syndrome (DS) may experience impairments in sensory and motor skills that can be interrelated. The purposes of this study were (i) to compare the sensory processing patterns and gross motor function between children and adolescents with DS and with typical development (TD) and (ii) to explore associations between these areas in both DS and TD groups.

METHOD

This cross-sectional study involved a sample size of 25 participants with DS (mean age 10.24 ± 2.04 years) and 25 participants with TD (mean age 10.04 ± 2.82 years). The sensory processing patterns were assessed using the Sensory Profile Second Version questionnaire, and the gross motor function was measured with the Gross Motor Function Measure (GMFM-88) dimensions (D) standing, and (E) walking, running, and jumping. Differences between groups were tested using the Mann-Whitney test, and the relationship between the variables was examined using Spearman's correlation tests, with a significance level set at 5%.

RESULTS

Children with DS showed greater difficulties with sensory processing than TD children in Seeker (P < 0.001), Avoider (P < 0.001), Sensitivity (P < 0.001), Registration (P < 0.001), Auditory (P < 0.001), Touch (P = 0.001), Movements (P = 0.001), Oral (P = 0.028), Conduct (P = 0.005), Socioemotional (P < 0.001), and Attentional (P < 0.001) domains. Additionally, children with DS presented lower gross motor function than TD in GMFM-88, standing (P < 0.001) and walking, running, and jumping (P < 0.001). Correlations were found between greater difficulties with sensory processing in Touch and lower gross motor function in walking, running, and jumping for the DS group.

CONCLUSION

Our results suggest there are more difficulties in sensory processing patterns and gross motor function in children with DS than in TD. Also, there is a single association between more difficulties in sensory processing and less well-developed motor function in the DS group. Therefore, a comprehensive assessment of all these aspects should be performed in children and adolescents with DS, along with the provision of relevant interventions addressing specific needs.

The development and validation of the "SENSE" - Sensory and Behavioral Modulation Questionnaire for adults

Sensory modulation is critical for interacting with the physical and social environment. When sensory input from the environment is not properly perceived and modulated, it may elevate arausability, avoidant behavior, impair function and wellbeing. Sensory modulation difficulties (SMD) are mainly reported during childhood and are related to neurodevelopmental conditions such as Attention-Deficit Hyperactivity Disorder (ADHD). SMD in adulthood further deteriorate function and emotional status, hence should be screened and treated. Nonetheless, relevant measures of SMD for adults are limited. This study aims to establish the psychometric properties of the "SENSE" - Sensory and Behavioral Modulation Questionnaire for adults. Based on theoretical/clinical knowledge the SENSE measures sensitivity/arousability, habituation and avoidance. After establishing content and face validity, 663 participants aged 18-65 completed a sociodemographic and health questionnaire, the Adult ADHD Scale-5 (ASRS-5), the SENSE and the Highly Sensitive Person Scale (HSPS). Factor analysis approved the determination of SENSE scales. Medium- high internal consistency was found. SENSE discriminated between adults with/without ADHD and correlated with HSPS scores, confirming concurrent validity. CONCLUSIONS: SENSE has good psychometric properties and may be feasible for screening sensory-behavioral modulation difficulties in adults. Studies should further examine SENSE applicability to clinical populations.

[Sensory food aversion in the context of a modern approach to eating disorders in early childhood]

Sensory food aversion, an early childhood eating disorder, is a serious, permanent form of picky eating, in which the infant or the child consistently and persistently refuses certain foods based on specific characteristics, following one or more previous aversive experiences. Biological (sensory processing disorder, taste sensitivity) and environmental factors contribute to its development. Due to limited diet, specific dietary deficiencies may occur but weight gain is usually normal. Behavioral problems, anxiety disorder, autism spectrum disorder are often associated. Diagnosis can usually be made based on a detailed history, but further assessment may include pediatric examination, nutritionist consultation, and psychologic and occupational therapy assessment. Treatment is based on parent education and support in order to minimize mealtime battles and anxiety and to think together about strategies for expanding the child's diet and to help them to accept new foods. As part of the interdisciplinary team, the pediatrician's role is to monitor appropriate growth and development, exclude dietary deficiencies or prescribe supplementation if necessary. In our article, the screening and treatment of sensory processing disorder as part of the assessment of eating problems are introduced as an example of good clinical practice at the Early Childhood Eating and Sleep Disorder Outpatient Clinic at the Heim Pál National Institute of Pediatrics. Orv Hetil. 2023; 164(45): 1767-1777.

Exploring Co-Regulation-Related Factors in the Mothers of ADHD Children-Proof of Concept Study

BACKGROUND

Attention deficit hyperactivity disorder (ADHD) is a complex neurological condition interfering with family relationships and co-regulation capabilities. Therefore, exploring factors underpinning parental co-regulation ability is crucial for future fostering relationships in families of children with ADHD.

OBJECTIVE

This preliminary study aims to characterize and compare the executive-functions, anxiety, self-efficacy, and sensory modulation in mothers of children with and without ADHD.

METHOD

Mothers of children with (study group) and without (control-comparison, group) ADHD completed online self-reports, measuring executive-functions; parental self-efficacy; anxiety; and sensory modulation.

RESULTS

The study group (N = 40) had lower self-efficacy compared to the control group (N = 27; p = 0.018), and the control group had lower sensory responsiveness (p = 0.025). Within both groups the Behavior Rating Inventory of Executive Function-Adult (BRIEF-A) Global Executive Function Composite score (GEC) and the Beck Anxiety Inventory (BAI) were moderately correlated. Further, within the study group correlations were found between the BRIEF-A-GEC and the Sensory Responsiveness Questionnaire (SRQ)-Aversive scores (r = 0.37, p ≤ 0.01), and between the BRIEF-A Behavioral-Rating-Index and the parental self-efficacy scores (r = 0.31, p ≤ 0.05). Within the control group, negative correlations were found between the BRIEF-A-GEC and SRQ-Hedonic scores (r= -0.44, p < 0.05).

CONCLUSION

Self-efficacy, executive-functions, high sensory responsiveness and anxiety traits are interwoven and may impact parental co-regulation ability.

Differentiation of peripheral sensory neurons from iPSCs derived from stem cells from human exfoliated deciduous teeth (SHED)

Peripheral nervous system (PNS) sensory alterations are present in several pathologies and syndromes. The use of induced pluripotent stem cell (iPSC) technology is an important strategy to produce sensory neurons in patients who are accomplished in terms of sensory symptoms. The iPSC technology relies on manipulating signaling pathways to resemble what occurs in vivo, and the iPSCs are known to carry a transcriptional memory after reprogramming, which can affect the produced cell. To this date, protocols described for sensory neuron production start using iPSCs derived from skin fibroblasts, which have the same ontogenetic origin as the central nervous system (CNS). Since it is already known that the cells somehow resemble their origin even after cell reprogramming, PNS cells should be produced from cells derived from the neural crest. This work aimed to establish a protocol to differentiate sensory neurons derived from stem cells from human exfoliated deciduous teeth (SHED) with the same embryonic origin as the PNS. SHED-derived iPSCs were produced and submitted to peripheral sensory neuron (PSN) differentiation. Our protocol used the dual-SMAD inhibition method, followed by neuronal differentiation, using artificial neurotrophic factors and molecules produced by human keratinocytes. We successfully established the first protocol for differentiating neural crest and PNS cells from SHED-derived iPSCs, enabling future studies of PNS pathologies.

Sensory Integration Disorders in Patients with Multiple Sclerosis

Sensory integration disorder (SID) is also called, interchangeably, sensory processing disorder (SPD). Multiple sclerosis (MS) is an autoimmune, chronic, neurological disease of the central nervous system. Sensorimotor function disorders are present in both multiple sclerosis and SID. The study aimed to assess the SID among patients with MS and included 141 patients with relapse-remitting MS and 72 participants in the control group. To assess SID in both groups, a questionnaire prepared by Daniel Travis was used. Additionally, participants answered questions regarding their age, gender, handedness and in the study group about the duration of the disease, relapses in the past year and the advancement of the disease using EDSS. The occurrence of sensory seeking was significantly more frequent in the MS patients with relapses in the past year. Patients with MS had more often general disorders of sensory integration in the past. However, healthy subjects significantly more often showed the severity of social and emotional disorders in the past. Currently, the group of MS patients has a greater intensity of sensor-based motor abilities. The study revealed more severe SID in MS patients than in the control group. Still, more research is needed in this field.

Characterizing Sleep Differences in Children With and Without Sensory Sensitivities

Objectives

Individuals register and react to daily sensory stimuli differently, which influences participation in occupations. Sleep is a foundational nightly occupation that impacts overall health and development in children. Emerging research suggests that certain sensory processing patterns, specifically sensory sensitivities, may have a negative impact on sleep health in children. In this study, we aimed to (i) characterize sleep in children with and without sensory sensitivities and (ii) examine the relationship between sensory processing patterns (using the Sensory Profile-2) and sleep using validated parent- and child-reported questionnaires. We hypothesized that children with sensory sensitivities will exhibit more difficulties with sleep.

Methods

We recruited 22 children (ages 6-10) with sensory sensitivities (SS) and 33 children without sensory sensitivities (NSS) to complete validated sleep and sensory processing questionnaires: the Children's Sleep Habits Questionnaire (CSHQ), Sleep Self-Report (SSR), and Sensory Profile-2.

Results

Children with SS had significantly more sleep behaviors reported by both parents (p < 0.001, g = 1.11) and children (p < 0.001, g = 1.17) compared to children with NSS. Specifically, children with SS had higher frequencies of sleep anxiety (p = 0.004, g = 0.79), bedtime resistance (p = 0.001, g = 0.83), and sleep onset delay (p = 0.003, g = 0.95). Spearman's ρ correlations indicated significant positive correlations between parent- and child-reported sleep. Children with SS showed a larger association and greater variability between sleep and sensory processing compared to their peers. Significant positive correlations between parent-reported sleep behaviors and sensory sensitive and avoiding patterns were identified for both children with SS and NSS. Child-reported sleep behaviors were most strongly associated with sensitive and avoiding patterns for children with NSS and seeking patterns for children with SS.

Conclusion

We present evidence that sleep is impacted for children with SS to a greater extent than children with NSS. We also identified that a child's sensory processing pattern may be an important contributor to sleep problems in children with and without sensory sensitivities. Sleep concerns should be addressed within routine care for children with sensory sensitivities. Future studies will inform specific sleep intervention targets most salient for children with SS and other sensory processing patterns.

Relationships between executive functions and sensory patterns among adults with specific learning disabilities as reflected in their daily functioning

Adults with specific learning disabilities (e.g., dyslexia, dysgraphia, and dyscalculia) reveal limitations in daily functioning in various life domains. Following previous evidence of deficient executive functions and unique sensory patterns in this population, this study examined how relationships between these two domains are expressed in daily functioning. Participants included 55 adults with specific learning disabilities and 55 controls matched by age, gender, socioeconomic status, and education. Participants completed a sociodemographic questionnaire, the Behavioral Rating Inventory of Executive Functions–adult version, and the Adolescent/Adult Sensory Profile. Results indicated significant relationships between executive functions (per the Behavioral Rating Inventory of Executive Functions–adult version) and sensory patterns (per the Adolescent/Adult Sensory Profile) as reflected in daily functioning. The low sensory registration pattern predicted 12% to 16% of the variance in the behavioral regulation index, metacognitive index, and general executive composite scores and was a significant predictor of specific executive function abilities. Results indicated that the difficulties of adults with specific learning disabilities in using executive function abilities efficiently might be tied to a high sensory threshold and passive self-regulation strategies. A deeper understanding of this population’s sensory–executive mechanisms may improve evaluation and intervention processes. This understanding can consequently increase executive abilities for improved daily functioning and life satisfaction.

Understanding Foot Loading and Balance Behavior of Children with Motor Sensory Processing Disorder

Sensory processing disorder (SPD) could influence the neuromuscular response and adjustment to external sensory discrimination and lead to disruptions in daily locomotion. The objective of the current study was to compare plantar loadings and foot balance during walking, running and turning activities in SPD children in order to reveal the behavioral strategy of movement and balance control. Six SPD children and six age-match healthy controls participated in the test using a FootScan plantar pressure plate. The time-varying parameters of forces, center of pressure and foot balance index were analyzed using an open-source one-dimensional Statistical Parametric Mapping (SPM1d) package. No difference was found in foot balance and plantar loadings during walking, while limited supination–pronation motion was observed in the SPD children during running and turning. The plantar forces were mainly located in the midfoot region while less toe activity was found as well. Findings should be noted that SPD children had limited supination–pronation movement for shock attenuation in the foot complex and reduced ankle pronation to assist push-off and toe gripping movements. Understanding the behavior of plantar loading strategy and balance control during walking, running and turning activities may provide clinical implications for the rehabilitation and training of daily tasks.

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 (T1—baseline; T2—preintervention; T3—postintervention; T4—follow-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.

Characterizing Social Functioning in School-Age Children with Sensory Processing Abnormalities

Children with sensory abnormalities (SAs) have a variety of social problems resulting in poorer social functioning than children with typical development (TD). We describe the relationship between SAs and social functioning in school-age children with SAs, children with TD and a clinical comparison sample of children with autism spectrum disorder (ASD). Children with SAs demonstrated impaired social functioning on standardized measures. Children with SAs demonstrated worse social functioning than children with TD and equivalent social functioning to children with ASD. Increased SAs were associated with poorer social functioning across all groups. The results suggest that children with SAs experience clinically significant problems with social functioning and future research is needed to develop interventions to support social functioning in this population.

High Sensory Responsiveness in Older Adults is Associated with Walking Outside but Not Inside: Proof of Concept Study

Background and Purpose

Reduced mobility and a higher risk of falls among older adults are related to aging-associated sensory alteration. Sensory responsiveness (SR) has been found to be strongly correlated with postural control in studies on young adults in stimulating environments; however, SR has not been studied in the context of mobility among older adults, despite its potential to enhance fall risks. The aim of the current study is to characterize the associations between SR and gait under single and dual-task (ST, DT) conditions inside and outside the laboratory.

Methods

Twenty-six community-dwelling older adults (age 70.3 ± 4.6 years, 65.4% women) participated in this cross-sectional study. Gait variables were measured using the APDM system under single and dual task conditions, in a quiet corridor inside and in an ecological (outside) environment. SR was evaluated using the SR questionnaire and cognition was assessed with the Trail-Making Test and the Montreal Cognitive Assessment.

Results

SR was negatively associated with gait speed during ST (r_s = −0.491, p < 0.05) and DT (r_s = −0.528, p < 0.01) outside and with ST gait speed inside (r_s = −0.528, p < 0.01). SR was positively associated with gait variability under DT (r_s = 0.41, p < 0.05) and with DT cost (r_s = 0.44, p < 0.05) only outside.

Conclusion

SR may play an important role in understanding mobility deterioration throughout the aging process, especially outside, illuminating the importance of SR evaluation among older adults during mobility assessment. Therefore, accounting for SR in gait research may contribute to a better understanding of mobility decline throughout the aging process.

Increased resting-state activity in the cerebellum with mothers having less adaptive sensory processing and trait anxiety

Child‐rearing mothers with high levels of trait anxiety have a tendency for less adaptive sensory processing, which causes parenting stress. However, the neural mechanisms underlying this sensory processing and trait anxiety remain unclear. We aimed to determine the whole‐brain spontaneous neural activity and sensory processing characteristics in mothers with varying parenting stress levels. Using resting‐state functional magnetic resonance imaging, we assessed mothers caring for more than one preschool aged (2–5 years) child and presenting with varying levels of sensory processing, trait anxiety, and parenting stress. Spontaneous neural activities in select brain regions were evaluated by whole‐brain correlation analyses based on the fractional amplitude of low‐frequency fluctuations (fALFF). We found significant positive correlations between levels of sensory processing with trait anxiety and parenting stress. Mothers having less adaptive sensory processing had significantly increased resting‐state network activities in the left lobule VI of the cerebellum. Increased fALFF values in the left lobule VI confirmed the mediation effect on the relationship between trait anxiety and sensory processing. A tendency for less adaptive sensory processing involving increased brain activity in lobule VI could be an indicator of maternal trait anxiety and the risk of parenting stress.

Collaboration to Improve Neuroprotection and Neuropromotion in the NICU: Team Education and Family Engagement

The number of babies born extremely low birth weight surviving to be discharged home after experiencing the NICU continues to improve. Unfortunately, early sensory development for these babies occurs in an environment vastly different from the intended in-utero environment and places them at high risk of long-term neurodevelopmental and neurocognitive challenges. Our goal in the NICU must transition from simply discharge home to supporting the neurosensory development necessary for a thriving lifetime. To accomplish a goal of thriving families and thriving babies, it is clear the NICU interprofessional team must share an understanding of neurosensory development, the neuroprotective strategies safeguarding development, the neuropromotive strategies supporting intended maturational development, and the essential nature of family integration in these processes. We share the educational endeavors of 11 center collaboratives in establishing the foundational knowledge necessary to support preterm babies and their families.

Characteristics of Idiopathic Sensory Processing Disorder in Young Children

This study described the developmental and behavioral characteristics of children identified with idiopathic sensory processing disorder (SPD) as well as the relations among specific types of SPD as proposed by the nosology presented by Miller et al. (2007), adaptive behavior profiles, and behaviors associated with mental functioning. A retrospective, non-experimental design applying descriptive and correlational analyses was used. Data were obtained from clinic medical records of 78 children ages 2 to 7 years who were identified with sensory processing problems affecting daily life, but who did not meet criteria for any other neurodevelopmental or mental disorders following a comprehensive diagnostic evaluation. Results revealed that all SPD types as described by current typologies were well represented with the most common being the over-responsivity sensory modulation subtype. Within the sample, 53% of the children displayed more than one SPD type. Atypical externalizing and internalizing behavior scores associated with various mental disorders as measured by the child behavior checklist (CBCL) fell in the borderline dysfunctional range. Adaptive behavior for all developmental domains was below average, and the severity of SPD symptoms moderately and positively correlated with behaviors associated with mental disorders, and with lower adaptive behavior performance. It was concluded that symptoms characteristic of the various types of idiopathic SPD overlap substantially suggesting that current typologies may include more types/subtypes than are necessary or clinically useful. Children with SPD share similar, but often less severe pathological behaviors associated with other mental or related neurodevelopmental disorders. Psychometrically sound measures of SPD are needed, and further study of the neural mechanisms involved in sensory processing deficits is vital for validating idiopathic SPD as its own diagnostic entity.

Relationship between Sensory Alterations and Repetitive Behaviours in Children with Autism Spectrum Disorders: A Parents' Questionnaire Based Study

The relationship between sensory profile and repetitive behaviours in autism spectrum disorder (ASD) has long been known. However, there is no consensus on the type of relationship that exists between them. This monocentric retrospective-prospective observational study aimed (a) to detect a clinical correlation between the severity of repetitive behaviours and the alterations of sensory profile in a sample of 50 children diagnosed with ASD; (b) to evaluate how different patterns of stereotypies and sensory alterations correlate with each other and with the main clinical-instrumental variables in the same sample. We enrolled 29 children in the retrospective phase of the study and 21 in the prospective phase. The Repetitive Behaviour Scale-Revised (RBS-R) and the Short Sensory Profile (SSP) were administered to the caregivers, and clinical-instrumental data were collected. SSP and RBS-R total scores directly correlated with a high significance rate. Among the subscales, the strongest correlations involved "Visual/Auditory Sensitivity", related to "Stereotyped Behaviour" and "Sameness Behaviour". "Under-Responsive/Seeks Sensation" related to "Stereotyped Behaviour". Sex and intellectual disability significantly influenced both the stereotypies and the sensory alterations of the examined population. In conclusion, this study provides new insights into the relationship between sensory alterations and repetitive behaviours in ASD children by using direct medical observation and parent observation.

The relationship between the sensory processing and occupational motor skills of children with autism spectrum disorder

Background/Aims

Motor skills difficulties may affect participation and communication in children with autism. Sensory processing problems are well-known problems in children with autism, so sensory processing could be important to predicate motor skills. The aim of this study was to examine the relationship between sensory processing and occupational motor skills and the ability to predict motor skill performances using sensory abilities.

Methods

A total of 31 children with autism participated in the study. The Sensory Profile questionnaire and Short Child Occupational Profile tool were used to assess the sensory ability and occupational motor skills of the children (boys=90.3%; mean age=5.45 years ± 1.73 years). The backward method of correlation coefficient analysis, multiple linear regression analysis, and multiple regressions were used for statistical analysis.

Results

There was a significant relationship between occupational motor skills and sensory processing capabilities of children. The regression prediction equation was statistically significant in all sections of sensory processing except for oral processing (F (6.24)=4.46, P=0.004), with a value of R2=0.527 and R2Adj=0.409. Modelling motor skills based on sensory processing capabilities of children showed that the regression prediction equation was statistically significant (F (2.28) =11.87, P<0.001); with the value of R2=0.459 and R2Adj=0.420. In the final model, the factors of auditory processing and multi-sensory were found effective in children's motor skills (P<0.05).

Conclusions

Sensory processing is related to occupational motor skills and can help to predict occupational motor skill issues of children with autism spectrum disorder. This could be helpful to develop appropriate treatments to improve the functional motor skills of children with autism.

Sensory Modulation Disorder and its Neural Circuitry in Adults with ADHD: A Pilot Study

Compared to healthy controls (HCs), individuals with attention-deficit/hyperactivity disorder (ADHD) exhibit more symptoms of sensory processing disorder (SPD), which is associated with difficulties in educational and social activities. Most studies examining comorbid SPD-ADHD have been conducted with children and have not explored relations to brain volumes. In this pilot study, we assessed a subtype of SPD, sensory modulation disorder (SMD), and its relation to select brain volumes in adults with ADHD. We administered part of the Sensory Processing 3-Dimensions Scale (SP3D) to assess subtypes of SMD and collected structural imaging scans from 25 adults with ADHD and 29 healthy controls (HCs). Relative to HCs, subjects with ADHD scored higher on sensory craving (SC) and sensory under-responsivity (SUR) subscales. Although sensory over-responsivity (SOR) was marginally higher, this was no longer true when accounting for co-occurring anxiety. In individuals with ADHD, both SC and SUR were positively associated with amygdalar volume, SUR was also positively associated with striatal volume, whereas SOR was negatively associated with posterior ventral diencephalon volume. These preliminary findings suggest that SC and SUR may be characteristic of ADHD while SOR may be driven by co-occurring anxiety. Because different modalities were associated with different brain volumes, our findings also suggest that the modalities may involve unique neural circuits, but with a partial overlap between SC and SUR. These pilot data provide support for conducting studies examining SMD in larger samples of adults with ADHD to determine reproducibility, applicability and implications of these findings.

Altered Cerebellar White Matter in Sensory Processing Dysfunction Is Associated With Impaired Multisensory Integration and Attention

Sensory processing dysfunction (SPD) is characterized by a behaviorally observed difference in the response to sensory information from the environment. While the cerebellum is involved in normal sensory processing, it has not yet been examined in SPD. Diffusion tensor imaging scans of children with SPD (n = 42) and typically developing controls (TDC; n = 39) were compared for fractional anisotropy (FA), mean diffusivity (MD), radial diffusivity (RD), and axial diffusivity (AD) across the following cerebellar tracts: the middle cerebellar peduncles (MCP), superior cerebellar peduncles (SCP), and cerebral peduncles (CP). Compared to TDC, children with SPD show reduced microstructural integrity of the SCP and MCP, characterized by reduced FA and increased MD and RD, which correlates with abnormal auditory behavior, multisensory integration, and attention, but not tactile behavior or direct measures of auditory discrimination. In contradistinction, decreased CP microstructural integrity in SPD correlates with abnormal tactile and auditory behavior and direct measures of auditory discrimination, but not multisensory integration or attention. Hence, altered cerebellar white matter organization is associated with complex sensory behavior and attention in SPD, which prompts further consideration of diagnostic measures and treatments to better serve affected individuals.

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.

Covariation Between Brain Function (MEG) and Structure (DTI) Differentiates Adolescents with Fetal Alcohol Spectrum Disorder from Typically Developing Controls

The behavioral, cognitive, and sensory difficulties experienced by individuals exposed to alcohol prenatally currently fail to provide early identification for fetal alcohol spectrum disorder (FASD). Attempting to advance this pursuit through a multivariate analysis, we collected magnetoencephalography (MEG) data during auditory, somatosensory, visual paradigms, DTI, and behavior in adolescents ages 12-21 years (FASD: N = 13; HC: N = 20). We assessed the relationship between brain function (MEG) and structure (fractional anisotropy (FA)) utilizing joint independent component analysis (jICA), and examined how this measure relates to behavior. We identified 5 components that reveal group differences in co-variation between MEG and FA. For example, component 5 (t = 3.162, p = 0.003, Hedges' g = 1.13) contained MEG activity corresponding to all three sensory modalities, most robustly in occipital lobes, and DTI-derived cerebellar FA, underlying the role of the cerebellum in sensory processing. Further, in HCs component 5's loading factor was positively correlated with verbal ability (r = 0.646, p = 0.002), indicating higher covariation was associated with better verbal performance. Interestingly, this relationship is lacking in FASD (r = 0.009, p = 0.979). Also, component 5 loading factor negatively correlated with impulsivity (r = -0.527, p = 0.002), indicating that stronger function-structure associations were associated with individuals with lower impulsivity. These findings suggest that multimodal integration of MEG and FA provides novel associations between structure and function that may help differentiate adolescents with FASD from HC.

Problems in Audiovisual Filtering for Children with Special Educational Needs

There is pervasive evidence that problems in sensory processing occur across a range of developmental disorders, but their aetiology and clinical significance remain unclear. The present study investigated the relation between sensory processing and literacy skills in children with and without a background of special educational needs (SEN). Twenty-six children aged between 7 and 12 years old, from both regular classes and SEN programmes, participated. Following baseline tests of literacy, fine motor skills and naming speed, two sets of instruments were administered: the carer-assessed Child Sensory Profile-2 and a novel Audiovisual Animal Stroop (AVAS) test. The SEN group showed significantly higher ratings on three Child Sensory Profile-2 quadrants, together with body position ratings. The SEN participants also showed a specific deficit when required to ignore an accompanying incongruent auditory stimulus on the AVAS. Interestingly, AVAS performance correlated significantly with literacy scores and with the sensory profile scores. It is proposed that the children with SEN showed a specific deficit in "filtering out" irrelevant auditory input. The results highlight the importance of including analysis of sensory processes within theoretical and applied approaches to developmental differences and suggest promising new approaches to the understanding, assessment, and support of children with SEN.

Diverse Autonomic Nervous System Stress Response Patterns in Childhood Sensory Modulation

The specific role of the autonomic nervous system (ANS) in emotional and behavioral regulation—particularly in relation to automatic processes—has gained increased attention in the sensory modulation literature. This mini-review article summarizes current knowledge about the role of the ANS in sensory modulation, with a focus on the integrated functions of the ANS and the hypothalamic-pituitary-adrenal (HPA) axis and their measurement. Research from the past decade illustrates that sympathetic and parasympathetic interactions are more complex than previously assumed. Patterns of ANS activation vary across individuals, with distinct physiological response profiles influencing the reactivity underlying automatic behavioral responses. This review article advances a deeper understanding of stress and the complex stress patterns within the ANS and HPA axis that contribute to allostatic load (AL). We argue that using multiple physiological measurements to capture individual ANS response variation is critical for effectively treating children with sensory modulation disorder (SMD) and sensory differences. We consider the relative contributions of automatic vs. deliberately controlled processes across large-scale neural networks in the development of sensorimotor function and their associated links with arousal patterns and sensory over- and under-responsivity.

The impact of sensory processing on executive and cognitive functions in children with autism spectrum disorder in the school context

BACKGROUND

Theoretical approaches propose a hierarchical organization of sensory and higher-order cognitive processes, in which sensory processing influence some cognitive and executive functions.

AIMS

The main objective of this study was to analyze whether sensory processing dysfunctions can predict the cognitive and executive dysfunctions evaluated in a group of children with level 2 autism spectrum disorder (ASD) in the school context.

METHODS AND PROCEDURES

Two groups of children participated: an ASD group (n = 40) and a group of children with typical development (the comparison group, n = 40). The children's sensory processing was evaluated based on their teachers' perceptions, and the children's executive and cognitive functions were evaluated using direct performance measures.

RESULTS

In the ASD group, the sensory processing difficulties predicted executive and cognitive dysfunctions in the specific domains of inhibitory control, auditory sustained attention, and short-term verbal memory, after controlling the possible effect of ASD severity. Moreover, the ASD group showed higher levels of sensory, executive, and cognitive dysfunction than the comparison group.

CONCLUSIONS AND IMPLICATIONS

Future research should investigate whether adequate sensory interventions in children with ASD in the school context can improve these specific executive and cognitive functions.

The involvement of altered sensory modulation in neurological conditions and its relevance to neuro-rehabilitation: a narrative literature review

PURPOSE

Neurological conditions are frequently described and treated with emphasis on primarily body dysfunctions that appear in the diagnostic criteria. This perspective paper aims to provide knowledge about the involvement of secondary body dysfunctions - altered sensory modulation - in neurological conditions and their relevance to neuro-rehabilitation. This paper refers to children and adults, to provide a life span view. Health models and approaches are discussed to bring ideas for optimizing rehabilitation.

METHODS

Perspective based on narrative literature review.

RESULTS

Altered sensory modulation is prevalent in neurological conditions. It is related to clinical symptoms, comorbidities and severity level. Many studies focus on specific modalities and on laboratory/clinical measurements. However, information gathered from subjective measures reflects the alterations in various sensory modalities and their negative impacts on the individuals' daily activity performance, participation and quality of life (QOL).

CONCLUSIONS

Neuro-rehabilitation should consider altered sensory modulation in neurological conditions, apply health models with broad perspective, as the ICF, with multi-disciplinary team, objective and subjective measures to understand how pathogenic mechanisms in primary and secondary body dysfunctions impact the performance and participation in daily life. This approach may optimize the individuals' involvement in therapy, enhance daily function and QOL and elevate intervention success.Implications for rehabilitationSensory modulation should be evaluated in children and adults with neurologic conditions.The evaluation and intervention should refer to the involvement of altered sensory modulation in the conditions' clinical characteristics, severity and comorbidities.In case altered sensory modulation is found, the evaluation and intervention should incorporate a multi-disciplinary collaboration and health models such as the ICF model, to optimize neuro-rehabilitation efficiency.Objective measures should be applied to profile altered sensory modulation and its role in pathogenic mechanisms.Subjective measures should also be used to reflect the expressions of altered sensory modulation as experienced by the individual (and family members), in daily life scenarios.By bridging between the clinic and the individuals' real-life context, rehabilitation process and outcomes may be optimized, in terms of the individual's greater involvement in therapy, better function and quality of life.

Sensory Over-Responsivity as an Added Dimension in ADHD

Years of research have added to our understanding of Attention Deficit Hyperactivity Disorder (ADHD). None-the-less there is still much that is poorly understood. There is a need for, and ongoing interest in, developing a deeper understanding of this disorder to optimally identify risk and better inform treatment. Here, we present a compilation of findings examining ADHD both behaviorally and using neurophysiologic markers. Drawing on early work of McIntosh and co-investigators, we examined response to sensory challenge in children with ADHD, measuring HPA activity and electrodermal response (EDR) secondary to sensory stressors. In addition, we have examined the relationship between these physiologic measures, and reports of behavioral sensory over-responsivity and anxiety. Findings suggest that sensory responsivity differentiates among children with ADHD and warrants consideration. We link these findings with research conducted both prior to and after our own work and emphasize that there a growing knowledge supporting a relationship between ADHD and sensory over-responsivity, but more research is needed. Given the call from the National Institute of Health to move toward a more dimensional diagnostic process for mental health concerns, and away from the more routine categorical diagnostic process, we suggest sensory over-responsivity as a dimension in the diagnostic process for children with ADHD.

Disorders of fine motor skills after a stroke: the processes of neuroplasticity and sensorimotor integration

Background. Impairment of fine motor skills in the hand is one of the most frequent causes of the persistent loss of professional skills, social maladjustment, and the impossibility of self-care in patients after a stroke, which ultimately leads to a significant reduction in the quality of their life. The article discusses the features of the fine motor skills’ impairment in the hand in patients after a stroke, in the context of a lateralized hemispheric lesion. Methods. We have studied 26 patients after a primary ischemic stroke in the pool of middle cerebral artery of the right (n=12) or left (n=14) brain hemisphere. The average age of patients was 55.7±7.3 years. Patients with a right-sided ischemic stroke were comparable to those with a left-sided stroke in their age, disease duration, size of the lesion and the gender ratio. Results. All the patients after an ischemic stroke had motor impairment in the form of a hemiparesis of a mild or moderate degree. Discussion. We suggest the existence of differentiated mechanisms for the development of fine and highly coordinated voluntary movements in the hand of patients after an ischemic stroke, depending on the lateralization of the supratentorial lesion: diffuse deficit of the afferent support in a right-sided ischemic stroke vs. bilateral efferent deficit for a left hemisphere lesion. Conclusion. The obtained data on the differentiated mechanisms for the development of fine and highly coordinated voluntary movements in the hand of patients after an ischemic stroke warrant the necessity of a further, more targeted research on those disorders in the post-stroke period, on order to optimize the existing rehabilitation approaches and improve the functional potential and quality of life of such patients.

Cooperation of the vestibular and cerebellar networks in anxiety disorders and depression

The discipline of affective neuroscience is concerned with the neural bases of emotion and mood. The past decades have witnessed an explosion of research in affective neuroscience, increasing our knowledge of the brain areas involved in fear and anxiety. Besides the brain areas that are classically associated with emotional reactivity, accumulating evidence indicates that both the vestibular and cerebellar systems are involved not only in motor coordination but also influence both cognition and emotional regulation in humans and animal models. The cerebellar and the vestibular systems show the reciprocal connection with a myriad of anxiety and fear brain areas. Perception anticipation and action are also major centers of interest in cognitive neurosciences. The cerebellum is crucial for the development of an internal model of action and the vestibular system is relevant for perception, gravity-related balance, navigation and motor decision-making. Furthermore, there are close relationships between these two systems. With regard to the cooperation between the vestibular and cerebellar systems for the elaboration and the coordination of emotional cognitive and visceral responses, we propose that altering the function of one of the systems could provoke internal model disturbances and, as a result, anxiety disorders followed potentially with depressive states.

Association between sensory modulation and daily activity function of children with attention deficit/hyperactivity disorder and children with typical development

BACKGROUND

The severity of the functional difficulties of children with attention-deficit/hyperactivity disorder (ADHD) is heterogeneous and may be affected by measurable factors.

AIMS

To characterize subgroups of children with ADHD with or without sensory modulation difficulties (SMD) and the association between sensory modulation and daily activity function in children with ADHD and children with typical development.

METHODS

38 children with ADHD and 39 controls (ages 8-11) were recruited and assessed, using the Conner's Parent Rating Scale-Revised: Short Form, the Short Sensory Profile (SSP) and the Children Activity Scale for Parents (ChAS-P).

RESULTS

The total SSP score of the ADHD group was lower (142.13 vs. 180.08; t=-8.23, p < 0.001) with a higher proportion of SMD (65.8% vs. 2.6%, χ² = 34.46, p < 0.001). The daily function of children with ADHD was lower than controls (mean ChAS-P: 3.95 vs. 4.78, p < 0.001). The difference was significant for children with ADHD and SMD (3.70 versus 4.81, p < 0.001), but not significant for children with ADHD and typical SSP (4.42 versus 4.81, p=0.35).

CONCLUSION

In this pilot study, we found that SMD, in children with ADHD is correlated with daily activity consequences. Hence, it should be evaluated in children with ADHD and addressed in their treatment plan.

An exploratory investigation of the effects of whole-head vibration on jaw movements

The perturbing effects of vibration applied to head and body structures are known to destabilize motor control and elicit corrective responses. Although such vibration response testing may be informative for identifying sensorimotor deficits, the effect of whole-head vibration has not been tested on oromotor control. The purpose of this study was to determine how jaw movements respond to the perturbing effects of whole-head vibration during jaw motor tasks. Ten healthy adults completed speech, chewing, and two syllable repetition tasks with and without whole-head vibration. Jaw movements were recorded using 3D optical motion capture. The results showed that the direction and magnitude of the response were dependent on the task. The two syllable repetition tasks responded to vibration, although the direction of the effect differed for the two tasks. Specifically, during vibration, jaw movements became slower and smaller during the syllable repetition task that imposed speed and spatial precision demands, whereas jaw movements became faster and larger during the syllable repetition task that only imposed speed demands. In contrast, jaw movements were unaffected by the vibration during speech and chewing. These findings suggest that the response to vibration may be dependent on spatiotemporal demands, the availability of residual afferent information, and robust feedforward models.

Sensory over-responsivity in trichotillomania (hair-pulling disorder)

OBJECTIVE

This study was an initial investigation of sensory-over responsivity (SOR) to external sensations among individuals with trichotillomania (TTM).

METHODS

Adults endorsing DSM-5 TTM criteria (N = 609) and a non-affected comparison sample (N = 268) completed a self-report survey.

RESULTS

The majority of the TTM group endorsed SOR symptoms; three-quarters endorsed at least mild tactile and auditory SOR. About 15% endorsed SOR symptoms in the severe to extreme range. TTM participants had significantly higher mean scores in both auditory (t (652.89) = -6.51, p < .001, d = .45) and tactile (t (655.24) = -8.38, p < .001, d = .58) modalities than comparison participants, with medium effect sizes. Greater levels of SOR were related to greater levels of perfectionism and by-proxy pulling urges. SOR was significantly and positively correlated with functional impairment when controlling for TTM severity.

CONCLUSION

This study expands prior work in obsessive-compulsive related disorders by contributing the first data about associations between TTM and over-responsivity to external sensations. Findings collectively suggest SOR may be related to maladaptive emotion regulation processes in TTM. A novel measure of SOR was developed and administered in this study.

Hormonal Cycle and Contraceptive Effects on Amygdala and Salience Resting-State Networks in Women with Previous Affective Side Effects on the Pill

The mechanisms linking ovarian hormones to negative affect are poorly characterized, but important clues may come from the examination of the brain's intrinsic organization. Here, we studied the effects of both the menstrual cycle and oral contraceptives (OCs) on amygdala and salience network resting-state functional connectivity using a double-blind, randomized, and placebo-controlled design. Hormone levels, depressive symptoms, and resting-state functional connectivity were measured in 35 healthy women (24.9±4.2 years) who had previously experienced OC-related negative affect. All participants were examined in the follicular phase of a baseline cycle and in the third week of the subsequent cycle during treatment with either a combined OC (30 μg ethinyl estradiol/0.15 mg levonorgestrel) or placebo. The latter time point targeted the midluteal phase in placebo users and steady-state ethinyl estradiol and levonorgestrel concentrations in OC users. Amygdala and salience network connectivity generally increased with both higher endogenous and synthetic hormone levels, although amygdala-parietal cortical connectivity decreased in OC users. When in the luteal phase, the naturally cycling placebo users demonstrated higher connectivity in both networks compared with the women receiving OCs. Our results support a causal link between the exogenous administration of synthetic hormones and amygdala and salience network connectivity. Furthermore, they suggest a similar, potentially stronger, association between the natural hormonal variations across the menstrual cycle and intrinsic network connectivity.

Neural Correlates of Sensory Abnormalities Across Developmental Disabilities

Abnormalities in sensory processing are a common feature of many developmental disabilities (DDs). Sensory dysfunction can contribute to deficits in brain maturation, as well as many vital functions. Unfortunately, while some patients with DD benefit from the currently available treatments for sensory dysfunction, many do not. Deficiencies in clinical practice surrounding sensory dysfunction may be related to lack of understanding of the neural mechanisms that underlie sensory abnormalities. Evidence of overlap in sensory symptoms between diagnoses suggests that there may be common neural mechanisms that mediate many aspects of sensory dysfunction. Thus, the current manuscript aims to review the extant literature regarding the neural correlates of sensory dysfunction across DD in order to identify patterns of abnormality that span diagnostic categories. Such anomalies in brain structure, function, and connectivity may eventually serve as targets for treatment.

Effectiveness of Cognitive and Occupation-Based Interventions for Children With Challenges in Sensory Processing and Integration: A Systematic Review

This systematic review examines the evidence for the effectiveness of cognitive and occupation-based interventions to improve self-regulation in children and youth who have challenges in processing and integrating sensory information. The Preferred Reporting Items for Systematic Reviews and Meta-Analysis guided the methodology. Five studies identified through a comprehensive database search met the inclusion criteria and were separated into categories of cognitive and occupation-based interventions. Articles that did not specifically measure sensory integration (SI) or processing challenges were omitted. Synthesis of the articles suggests that self-regulation (e.g., sensory processing, emotional regulation, executive functioning, social function) improved with cognitive and occupation-based interventions. Because the number of studies that measured sensory processing or SI challenges was limited, researchers are encouraged to include these measures in future research to understand the impact of a broader range of cognitive and occupation-based interventions.

Identification of Sensory Processing and Integration Symptom Clusters: A Preliminary Study

Rationale

This study explored subtypes of sensory processing disorder (SPD) by examining the clinical presentations of cluster groups that emerged from scores of children with SPD on the Sensory Processing 3-Dimension (SP-3D) Inventory.

Method

A nonexperimental design was used involving data extraction from the records of 252 children with SPD. Exploratory cluster analyses were conducted with scores from the SP-3D Inventory which measures sensory overresponsivity (SOR), sensory underresponsivity (SUR), sensory craving (SC), postural disorder, dyspraxia, and sensory discrimination. Scores related to adaptive behavior, social-emotional functioning, and attention among children with different sensory modulation patterns were then examined and compared.

Results

Three distinct cluster groups emerged from the data: High SOR only, High SUR with SOR, and High SC with SOR. All groups showed low performance within multiple domains of adaptive behavior. Atypical behaviors associated with social-emotional functioning and attention varied among the groups.

Implications

The SP-3D Inventory shows promise as a tool for assisting in identifying patterns of sensory dysfunction and for guiding intervention. Better characterization can guide intervention precision and facilitate homogenous samples for research.

Sensory processing disorder in preterm infants during early childhood and relationships to early neurobehavior

BACKGROUND

Preterm infants are exposed to a variety of sensory stimuli that they are not developmentally prepared to handle, which puts them at risk for developing a sensory processing disorder. However, the patterns and predictors of sensory processing disorder and their relationship to early behavior at term equivalent age are poorly understood.

OBJECTIVES

The aims of the study are to: 1) describe the incidence of sensory processing disorder in preterm infants at four to six years of age, 2) define medical and sociodemographic factors that relate to sensory processing disorder, and 3) explore relationships between early neurobehavior at term equivalent age and sensory processing disorder at age four to six years.

METHODS

This study was a prospective longitudinal design. Thirty-two preterm infants born ≤30weeks gestation were enrolled. Infants had standardized neurobehavioral testing at term equivalent age with the NICU Network Neurobehavioral Scale. At four to six years of age, participants were assessed with the Sensory Processing Assessment for Young Children (SPA).

RESULTS

Sixteen children (50%) had at least one abnormal score on the SPA, indicating a sensory processing disorder. There were no identified relationships between medical and sociodemographic factors and sensory processing disorder. More sub-optimal reflexes (p=0.04) and more signs of stress (p=0.02) at term equivalent age were related to having a sensory processing disorder in early childhood.

CONCLUSION

Preterm infants are at an increased risk for developing a sensory processing disorder. Medical and sociodemographic factors related to sensory processing disorder could not be isolated in this study, however relationships between sensory processing disorder and early neurobehavior were identified.

A pilot study to determine the feasibility of enhancing cognitive abilities in children with sensory processing dysfunction

Children with Sensory Processing Dysfunction (SPD) experience incoming information in atypical, distracting ways. Qualitative challenges with attention have been reported in these children, but such difficulties have not been quantified using either behavioral or functional neuroimaging methods. Furthermore, the efficacy of evidence-based cognitive control interventions aimed at enhancing attention in this group has not been tested. Here we present work aimed at characterizing and enhancing attentional abilities for children with SPD. A sample of 38 SPD and 25 typically developing children were tested on behavioral, neural, and parental measures of attention before and after a 4-week iPad-based at-home cognitive remediation program. At baseline, 54% of children with SPD met or exceeded criteria on a parent report measure for inattention/hyperactivity. Significant deficits involving sustained attention, selective attention and goal management were observed only in the subset of SPD children with parent-reported inattention. This subset of children also showed reduced midline frontal theta activity, an electroencephalographic measure of attention. Following the cognitive intervention, only the SPD children with inattention/hyperactivity showed both improvements in midline frontal theta activity and on a parental report of inattention. Notably, 33% of these individuals no longer met the clinical cut-off for inattention, with the parent-reported improvements persisting for 9 months. These findings support the benefit of a targeted attention intervention for a subset of children with SPD, while simultaneously highlighting the importance of having a multifaceted assessment for individuals with neurodevelopmental conditions to optimally personalize treatment.

Sensory modulation in preterm children: Theoretical perspective and systematic review

BACKGROUND

Neurodevelopmental sequelae in preterm born children are generally considered to result from cerebral white matter damage and noxious effects of environmental factors in the neonatal intensive care unit (NICU). Cerebral white matter damage is associated with sensory processing problems in terms of registration, integration and modulation. However, research into sensory processing problems and, in particular, sensory modulation problems, is scarce in preterm children.

AIM

This review aims to integrate available evidence on sensory modulation problems in preterm infants and children (<37 weeks of gestation) and their association with neurocognitive and behavioral problems.

METHOD

Relevant studies were extracted from PubMed, EMBASE.com and PsycINFO following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Selection criteria included assessment of sensory modulation in preterm born children (<37 weeks of gestation) or with prematurity as a risk factor.

RESULTS

Eighteen studies were included. Results of this review support the presence of sensory modulation problems in preterm children. Although prematurity may distort various aspects of sensory modulation, the nature and severity of sensory modulation problems differ widely between studies.

CONCLUSIONS

Sensory modulation problems may play a key role in understanding neurocognitive and behavioral sequelae in preterm children. Some support is found for a dose-response relationship between both white matter brain injury and length of NICU stay and sensory modulation problems.

Amygdala subnuclei resting-state functional connectivity sex and estrogen differences

The amygdala is a hub in emotional processing, including that of negative affect. Healthy men and women have distinct differences in amygdala responses, potentially setting the stage for the observed sex differences in the prevalence of fear, anxiety, and pain disorders. Here, we examined how amygdala subnuclei resting-state functional connectivity is affected by sex, as well as explored how the functional connectivity is related to estrogen levels. Resting-state functional connectivity was measured using functional magnetic resonance imaging (fMRI) with seeds placed in the left and right laterobasal (LB) and centromedial (CM) amygdala. Sex differences were studied in 48 healthy men and 48 healthy women, matched for age, while the association with estrogen was analyzed in a subsample of 24 women, for whom hormone levels had been assessed. For the hormone analyses, the subsample was further divided into a lower and higher estrogen levels group based on a median split. We found distinct sex differences in the LB and CM amygdala resting-state functional connectivity, as well as preliminary evidence for an association between estrogen levels and connectivity patterns. These results are potentially valuable in explaining why women are more afflicted by conditions of negative affect than are men, and could imply a mechanistic role for estrogen in modulating emotion.

Sensory Sensitivity and Strategies for Coping With Pain

OBJECTIVE. Our goal was to investigate the relationship between sensory processing styles and use of pain coping strategies in an experimental setting to understand individual differences in pain coping.

METHOD. A cross-sectional design was used with a convenience sample of 116 healthy adults. Measures of sensory processing style and mood state were collected before participation in a cold pressor pain-inducement task, and measures of coping strategies were collected afterward. Multiple regression models were constructed to examine relationships between sensory processing and coping strategies.

RESULTS. Sensory sensitivity and sensation avoiding were significantly associated with higher levels of catastrophizing. Sensation seeking was linked with active coping strategies, such as coping self-statements. Low registration was not significantly associated with any particular coping strategy after controlling for salient variables.

CONCLUSION. This study highlights associations between sensory processing and pain coping strategies, which may inform more tailored approaches to clinical practice for people in pain.

Multisensory integration and child neurodevelopment

A considerable number of cognitive processes depend on the integration of multisensory information. The brain integrates this information, providing a complete representation of our surrounding world and giving us the ability to react optimally to the environment. Infancy is a period of great changes in brain structure and function that are reflected by the increase of processing capacities of the developing child. However, it is unclear if the optimal use of multisensory information is present early in childhood or develops only later, with experience. The first part of this review has focused on the typical development of multisensory integration (MSI). We have described the two hypotheses on the developmental process of MSI in neurotypical infants and children, and have introduced MSI and its neuroanatomic correlates. The second section has discussed the neurodevelopmental trajectory of MSI in cognitively-challenged infants and children. A few studies have brought to light various difficulties to integrate sensory information in children with a neurodevelopmental disorder. Consequently, we have exposed certain possible neurophysiological relationships between MSI deficits and neurodevelopmental disorders, especially dyslexia and attention deficit disorder with/without hyperactivity.

Sensory over-responsivity in a sample of children seeking treatment for anxiety

OBJECTIVE

Sensory over-responsivity (SOR) refers to an exaggerated, intense, or prolonged behavioral response to ordinary sensory stimuli. The relationship of SOR to psychiatric disorders remains poorly understood. The current study examined the SOR construct within typically developing children with clinically significant anxiety, including the prevalence and course of SOR symptoms and relationship between SOR symptoms, demographic factors, and psychopathology.

METHOD

Children presenting at an anxiety specialty clinic (n = 88) completed a psychiatric diagnostic assessment, which included parent-report measures of SOR, anxiety, obsessive-compulsive disorder (OCD), and global behavior and child-report measures of anxiety, depression, and OCD.

RESULTS

Sensory over-responsivity symptoms were very common: 93.2% were bothered by at least 1 tactile or auditory sensation, and the mean number of bothersome sensations was 9.2 (SD = 7.4). SOR symptoms were reported to be "moderately bothersome" on average and to onset at an early age. Sensory Over-Responsivity Inventory (SensOR) scores did not differ by psychiatric disorder diagnosis, but SensOR scores significantly correlated with measures of OCD and depression. Higher SensOR scores were associated with greater global impairment.

CONCLUSION

A high rate of SOR symptom occurrence was observed in this sample of children seeking anxiety treatment, suggesting that SOR may not be entirely independent of anxiety and may be closely associated with OCD. Future research on the validity and nosology of SOR using psychiatric samples is warranted.

Sex-dependent behavioral functions of the Purkinje cell-specific Gαi/o binding protein, Pcp2(L7)

We previously reported motor and non-motor enhancements in a mouse mutant with an inactivated Purkinje cell-specific gene, Pcp2(L7), that encodes a GoLoco domain-containing modulator of Gi/o protein-coupled receptors. Effects included elevated learning asymptote with repeated rotarod training, increased acquisition rate in tone-cued fear conditioning (FC), and subtle male-specific changes in both acoustic startle habituation and pre-pulse inhibition. We have further analyzed this mutant strain this time with a focus on male-female differences, and here we report a sex-dependent anxiety-like phenotype: male mutants are less anxious, and female mutants are more anxious, than same-sex wild types. Similarly, the fear responses measured during the tone in FC acquisition are decreased in male mutants and increased in female mutants relative to same-sex wild types. Overall, the dynamics of both acquisition and extinction of FC is affected in mutants but memory was not affected. In the social realm, compositional analysis of sociability and preference for social novelty data supports that both L7 genotype and sex contribute to these behaviors. These results provide direct evidence of emotional functions of the cerebellum due to the unambiguous cerebellar specificity of Pcp2(L7) expression and the lack of any confounding motor defects in the mutant. We attempt to synthesize these new data with what is previously known both about Pcp2(L7) and about the effects of sex and sex hormones on anxiety and fear behaviors: specifically, L7 is a bidirectional and sex-dependent damper that regulates the amplitude and/or rate of sensorimotor responses, potentially acting as a mood stabilizer.

Hyperbilirubinemia: subcortical mechanisms of cognitive and behavioral dysfunction

Although development of the full syndrome of kernicterus is relatively rare, neonatal jaundice continues to occur frequently. Controversy remains concerning whether or not infants with moderate elevations in bilirubin are at risk for neurodevelopmental disorders in later childhood. Sites of brain pathology associated with bilirubin neurotoxicity are identified and well established. Based on these regions of brain involvement, we apply neuroscientific principles of brain-behavior relationships to predict types of cognitive features that may accompany hyperbilirubinemia. We address a range of neurodevelopmental abnormalities that can arise as a function of elevated neonatal bilirubin levels affecting these brain regions, even in the absence of full kernicterus syndrome. Moreover, we explain the neuropathologic mechanisms that would drive these abnormalities. We thus attempt to establish a blueprint for future investigations of these conditions, to improve neurodevelopmental outcomes.