Iulia Mihaila

The effects of normal aging on amyloid-β deposition in nondemented adults with Down syndrome as imaged by carbon 11-labeled Pittsburgh compound B.

In Down syndrome (DS), the overproduction of amyloid precursor protein is hypothesized to predispose young adults to early expression of Alzheimer‐like neuropathology.

Longitudinal changes in amyloid positron emission tomography and volumetric magnetic resonance imaging in the nondemented Down syndrome population

Down syndrome (DS) arises from a triplication of chromosome 21, causing overproduction of the amyloid precursor protein and predisposes individuals to early Alzheimers disease (AD).

Cognitive Behavioral Therapy for Depressed Adults With Mild Intellectual Disability: A Pilot Study

There is a paucity of research on psychosocial treatments for depression in adults with intellectual disability (ID). In this pilot study, we explored the efficacy of a group CBT treatment that involved a caregiver component in adults with mild ID with a depressive disorder. Sixteen adults with mild ID and a depressive disorder participated in a 10-week group CBT treatment and eight adults with mild ID with a depressive disorder served as a treatment as usual (TAU) control group. Adults with mild ID and caregivers completed measures of depressive symptoms, behavior problems, and social skills at pretreatment, posttreatment, and a 3-month follow-up. Adults with mild ID also completed a series of tasks to measure their understanding of the principles of cognitive therapy pre- and posttreatment. The CBT group demonstrated significant decreases in depressive symptoms and behavior problems from pretreatment to posttreatment and these effects were maintained at a 3-month follow-up. The CBT group demonstrated significant improvements in their ability to infer emotions and thoughts based on various situation-thought-emotion pairings from pretreatment to posttreatment. Findings indicate that adults with mild ID with a depressive disorder benefitted from a group CBT treatment with a caregiver component. Moreover, adults with mild ID appeared to benefit, at least in part, from the cognitive therapy components of the treatment, in addition to the behavior therapy components.

Parental sleep quality and behavior problems of children with autism.

This study explored the impact of parental sleep quality on the experience of behavior problems by children with autism spectrum disorder. A 14-day daily diary was used in a sample of 176 mother–father couples. Dyadic multilevel models were conducted to examine the between-person and within-person effects of previous-night sleep quality on parents’ rating of level of behavior problems by the child with autism spectrum disorder and level of positive and negative affect. Results indicated that persistently poor sleep quality was associated with between-person differences in initial rating of level of behavior problems by the child with autism spectrum disorder for mothers. At a within-person level, previous-night sleep quality moderated the association between rating of level of behavior problems by the child with autism spectrum disorder and level of positive and negative affect in fathers. Child-related stressors exerted less influence on fathers’ affect following a day with poor sleep quality. Interventions aimed at enhancing sleep quality in parents of children with autism spectrum disorder may have important effects on parental psychological well-being.

Couple Conflict in Parents of Children with versus without Autism: Self-Reported and Observed Findings

We compared the couple conflict of parents of children with autism spectrum disorder (ASD) to a comparison group of parents of children without disabilities using self-reported and observational measures. In total, 178 couples who had a child with ASD (aged 5–12 years) and 174 couples who had children without disabilities (aged 5–12 years), recruited from a Midwestern state in the United States, reported on couple conflict in everyday life and engaged in an observed couple conflict interaction. Parents of children with ASD reported more frequent, severe, and unresolved couple problems than the comparison group. Parents who had a child with ASD were observed to have less engaged, balanced, and cooperative couple conflict interactions, but demonstrated more positive affect and sensitivity towards one another, than parents in the comparison group. Group differences had small effect sizes. Findings have implications for marital therapy and relationship education programs.

Alzheimer-Like Pattern of Hypometabolism Emerges with Elevated Amyloid-β Burden in Down Syndrome

BACKGROUND The Down syndrome (DS) population is genetically predisposed to amyloid-β protein precursor overproduction and Alzheimers disease (AD). OBJECTIVE The temporal ordering and spatial association between amyloid-β, glucose metabolism, and gray matter (GM) volume in the DS population can provide insight into those associations in the more common sporadic AD. METHODS Twenty-four adults (13 male, 11 female; 39±7 years) with DS underwent [11C]PiB, [18F]FDG, and volumetric MRI scans. Voxel-wise associations between PiB SUVR, FDG SUVR, and GM volume were investigated, with and without individual adjustments for variables of interest. RESULTS Positive associations of PiB and age were widespread throughout the neocortex and striatum. Negative associations of FDG and age (frontal, parietal, and temporal cortex) and of GM volume and age (frontal and insular cortex) were observed. PiB and FDG were negatively associated in parietal cortex, after adjustment for GM volume. CONCLUSIONS In adults with DS, early amyloid-β accumulation in the striatum is divergent from sporadic AD; however, despite the early striatal amyloid-β, glucose hypometabolism was confined to the typical AD-associated regions, which occurs similarly in autosomal dominant AD. Importantly, the glucose hypometabolism was not explained solely by increased partial volume effect due to GM volume reductions.

Leisure Activity and Caregiver Involvement in Middle-Aged and Older Adults With Down Syndrome

The present study examined leisure activity and its association with caregiver involvement (i.e., residence and time spent with primary caregiver) in 62 middle-aged and older adults with Down syndrome (aged 30-53 years). Findings indicated that middle-aged and older adults with Down syndrome frequently participated in social and passive leisure activities, with low participation in physical and mentally stimulating leisure activities. Residence and time spent with primary caregiver were associated with participation in physical leisure activity. The findings suggest a need for support services aimed at increasing opportunities for participating in physical and mentally stimulating leisure activity by middle-aged and older adults with Down syndrome. These support services should partner with primary caregivers in order to best foster participation in physical leisure activity.

Reflections From Co-Researchers With Intellectual Disability: Benefits to Inclusion in a Research Study Team

Participatory action research methodologies may empower and protect marginalized individuals; however, they remain underutilized. Limited studies have investigated the impact of participatory action research, specifically on individuals with intellectual disability (ID). This study examines (1) the perspectives of co-researchers with ID on their involvement in the research process and (2) the feasibility of their inclusion based on perspectives of research staff (academic faculty and graduate students without ID). Three co-researchers with ID were interviewed regarding their research participation. Thematic analysis of interviews identified four themes: (1) Shared Experience of Disability, (2) Teaching and Guidance, (3) Acquisition of Skills and Knowledge, and (4) Value of Participation. Research staff reviewed field notes and identified benefits and challenges to feasibility of including co-researchers with ID. Inclusion of co-researchers with ID was found to be both meaningful and feasible.