ABSTRACT
This study investigates the presence of sensory modulation dysfunction (SMD) among children with attention-deficit-hyperactivity disorder (ADHD). Twenty-six children with ADHD (mean age 8.3 years, 18 males, 8 females), and 30 typically developing children (mean age 8.2 years, 21 males, 9 females) were tested using a laboratory procedure that gauges responses to repeated sensory stimulation by measuring electrodermal reactivity (EDR). Parental report measures of limitations in sensory, emotional, and attentional dimensions were administered using the Short Sensory Profile, the Leiter International Performance Scale-Revised, Parent Rating subscales, and the Child Behavior Checklist (CBCL). Compared to the typical sample, the children with ADHD displayed greater abnormalities in sensory modulation on both physiological and parent-report measures. The children with ADHD also displayed more variability in responses. Within the group with ADHD, levels of SMD were highly correlated with measures of psychopathology on the CBCL. Implications of findings relate to the importance of considering sensory processing abilities in a subgroup of children with ADHD.
Subject(s)
Attention Deficit Disorder with Hyperactivity/complications , Proprioception , Sensation Disorders/diagnosis , Sensation Disorders/etiology , Touch , Vestibular Diseases/diagnosis , Vestibular Diseases/etiology , Adolescent , Anxiety/etiology , Case-Control Studies , Child , Child Behavior Disorders/etiology , Child, Preschool , Depression/etiology , Female , Galvanic Skin Response , Humans , Juvenile Delinquency/psychology , Male , Psychophysiologic Disorders/etiology , Sensation Disorders/physiopathology , Sensation Disorders/psychology , Vestibular Diseases/physiopathology , Vestibular Diseases/psychologyABSTRACT
It was hypothesized that children clinically identified with sensory-modulation disruptions (SMD) would have atypical physiological responses to sensation, and that such responses would predict parent-reported behavioral responses to sensation. Nineteen children with clinically identified disruptions, aged 3 to 9 years, mean 6.0 years, and 19 age- and sex-matched healthy (control) children, aged 3 to 9 years, mean 6.6 years, were examined. The subjects were presented with five stimuli. Ten trials were conducted for each stimulus and the electrodermal activity of the child was recorded. Four children with SMD did not show electrodermal responses (EDR) to stimulation; all control children responded. Excluding non-responders, children with SMD showed more and larger EDR than control children. Participants with disruptions habituated more slowly to repeated stimulation, as measured by the number of responses to stimuli and proportion of stimuli that evoked responses. Children with atypical EDR had more parent-reported abnormal behavioral responses to sensation. Children with clinically identified SMD respond physiologically differently to sensory stimuli than typically developing children; these differences have ramifications for functional behavior.
Subject(s)
Aggression , Child Behavior/psychology , Galvanic Skin Response/physiology , Motor Skills Disorders/diagnosis , Sensation Disorders/diagnosis , Child , Child, Preschool , Female , Follow-Up Studies , Humans , Male , Motor Skills Disorders/psychology , Physical Stimulation/methods , Time FactorsABSTRACT
The fragile X mutation and fragile X syndrome are associated with hyperarousal, hyperactivity, aggression, and anxiety. These may be related to strong reactions to auditory, tactile, visual, and olfactory stimuli [Hagerman, 1996b; Hagerman and Cronister, 1996]. However, almost no data exist describing hyperarousal and sensory sensitivity in individuals with the fragile X mutation. This study establishes a reliable laboratory paradigm for examining reactions to sensory stimuli. We found the pattern of electrodermal responses (EDRs) to stimulation in one sensory modality predicted the pattern of EDRs in four other sensory systems. In addition, the EDR pattern of individuals with the fragile X mutation was related to their FMR-protein expression. Finally, EDRs in individuals with fragile X syndrome were significantly different from those of normal controls, demonstrating greater magnitude, more responses per stimulation, responses on a greater proportion of trials, and lower rates of habituation. The findings support the theory that individuals with fragile X syndrome have a physiologically based enhancement of reactions to sensations. Because electrodermal activity indexes sympathetic nervous system activity, the data suggest that the over-arousal to sensation may involve the sympathetic system.
Subject(s)
Fragile X Syndrome/physiopathology , Galvanic Skin Response/physiology , RNA-Binding Proteins , Adolescent , Adult , Child , Child, Preschool , Electric Stimulation , Female , Fragile X Mental Retardation Protein , Fragile X Syndrome/metabolism , Humans , Male , Middle Aged , Nerve Tissue Proteins/biosynthesisABSTRACT
Parents (N = 124) who had lost an infant to sudden infant death syndrome were interviewed 3 weeks and 18 months postloss. Two components of religion (religious participation and religious importance) were assessed, and their relations with 3 coping-process variables (perceived social support, cognitive processing of the loss, and finding meaning in the death) were examined. Greater religious participation was related to increased perception of social support and greater meaning found in the loss. Importance of religion was positively related to cognitive processing and finding meaning in the death. Furthermore, through these coping-process variables, religious participation and importance were indirectly related to greater well-being and less distress among parents 18 months after their infants' deaths. Results suggest that further study of the social and cognitive aspects of religion would be profitable.
