The relationship between visually evoked effects and concussion in youth

ABSTRACTIncreased sensitivity to light is common following concussion. Viewing a flickering light can also produce uncomfortable somatic sensations like nausea or headache. Here we examined effects evoked by viewing a patterned, flickering screen in a cohort of 81 uninjured youth athletes and 84 youth with concussion. We used exploratory factor analysis and identified two primary dimensions of variation: the presence or absence of visually evoked effects, and variation in the tendency to manifest effects that localized to the eyes (e.g., eye watering), versus more generalized neurologic symptoms (e.g., headache). Based on these two primary dimensions, we grouped participants into three categories of evoked symptomatology: no effects, eye-predominant effects, and brain-predominant effects. A similar proportion of participants reported eye-predominant effects in the uninjured (33.3%) and concussion (32.1%) groups. By contrast, participants who experienced brain-predominant effects were almost entirely from the concussion group (1.2% of uninjured, 35.7% of concussed). The presence of brain-predominant effects was associated with a higher concussion symptom burden and reduced performance on visio-vestibular tasks. Our findings indicate that the experience of negative constitutional, somatic sensations in response to a dynamic visual stimulus is a salient marker of concussion and is indicative of more severe concussion symptomatology. We speculate that differences in visually evoked effects reflect varying levels of activation of the trigeminal nociceptive system.

Symptom perception and functioning in patients with advanced cancer

Purpose To explore how symptom perception affects functioning in patients with advanced cancer. Materials and methods We conducted a cross-sectional observational study of 459 advanced cancer patients at the national cancer center. Functioning was assessed using the World Health Organization Disability Assessment Schedule (WHODAS) II, and symptoms were evaluated using the Memorial Symptom Assessment Scale-Short Form. Confirmatory factor analysis was conducted to develop a structural model based on different symptom perceptions, such as somatic sensation and experienced symptoms. Results The structural model of disability revealed a significant direct pathway involving somatic sensation (β = 16.11, p < 0.001). Experienced symptoms significantly affected somatic sensations (β = 0.717, p < 0.001) but were not directly associated with disability. Unidimensional models exhibited a poor fit. In contrast, a complex model with first-order (somatic sensation) and second-order (experienced symptoms) factors provided an excellent fit, with comparative fit indexes (CFIs) and Tucker Lewis indexes (TLI) of more than 0.950 threshold. Conclusions Our findings suggest that relationships to functioning may vary between somatic sensations versus experienced symptoms. The structure of symptoms is best conceptualized by direct somatic sensation and indirect experienced symptoms. A better understanding of symptom perception and the relationship between symptoms and function would facilitate the development of effective rehabilitation programs.

Intervening in the Intergenerational Transmission of Trauma by Targeting Maternal Emotional Dysregulation With EMDR Therapy

Many studies have shown that the relationship between child and caregivers is critical for healthy development of the child’s brain function, and for intergenerational transmission of attachment. Here, we propose a useful eye movement desensitization and reprocessing (EMDR) target for treatment of maternal emotional dysregulation that can cause maltreatment of the child, with the goal of interrupting intergenerational transmission of attachment trauma. First, we use schematics to demonstrate a hypothetical model of the interaction between a child’s attachment behavior and a mother’s bonding behavior. This schematic shows that the child’s physiologic reaction activates or triggers the mother’s negative affect and somatic sensations in her limbic system and brain stem and that, in turn, evokes the mother’s maltreatment behavior. The negative affect and somatic sensation (maternal emotional dysregulation) are Dysfunctionally Stored Information (DSI) that was produced in the mother’s past experience. We propose that the mother’s negative affect and somatic sensations activated by the child’s behaviors can be useful targets for EMDR therapy based on this hypothetical model. Two Japanese case reports (mothers with 4-year-old daughters) are described to illustrate this application. Further discussion highlights the feature of Japanese cultural relationship and the dissociation, and the meaning and scope of targeting maternal emotional dysregulation with EMDR therapy.