Holly D Barnard

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Recent studies of the cerebellum indicated its involvement in a diverse array of functions, and analyses of non-human primate neuroanatomy have revealed connections between cerebellum and cerebral cortex that might support cerebellar contributions to a wider range of functions than traditionally thought. These include cortico-ponto-cerebellar projections(More)
OBJECTIVE To determine if functional connectivity of the hippocampus is reduced in patients with Alzheimer disease. DESIGN Functional connectivity magnetic resonance imaging was used to investigate coherence in the magnetic resonance signal between the hippocampus and all other regions of the brain. PARTICIPANTS Eight patients with probable Alzheimer(More)
OBJECTIVE To develop a total or composite score for the Consortium to Establish a Registry for Alzheimer's Disease (CERAD) neuropsychological battery. METHOD CERAD total scores were obtained by summing scores from the individual CERAD subtests (excluding the Mini-Mental State Examination [MMSE]) into a total composite (maximum score = 100). The method of(More)
BACKGROUND This study tests a multiple cognitive deficit model of reading disability (RD), attention-deficit/hyperactivity disorder (ADHD), and their comorbidity. METHODS A structural equation model (SEM) of multiple cognitive risk factors and symptom outcome variables was constructed. The model included phonological awareness as a unique predictor of RD(More)
Although there has been much interest in the relation between brain size and cognition, few studies have investigated this relation within a genetic framework and fewer still in non-adult samples. We analyzed the genetic and environmental covariance between structural MRI data from four brain regions (total brain volume, neocortex, white matter, and(More)
This article examines Gene x Environment (G x E) interactions in two comorbid developmental disorders--reading disability (RD) and attention-deficit/hyperactivity disorder (ADHD)--as a window on broader issues on G x E interactions in developmental psychology. The authors first briefly review types of G x E interactions, methods for detecting them, and(More)
OBJECTIVE The primary aim of this study was to investigate the relationship between language levels and communication and social function skills in young children who are deaf/hard-of-hearing. METHOD A cross-sectional design was used with participants sampled predominately from a single clinic setting. Children between 3 and 6 years of age with permanent(More)
OBJECTIVE To explore the relationship between the Conners' Kiddie Continuous Performance Test (K-CPT) performance and parent-report measures of child behavior and executive functioning, and clarify the role of sex in K-CPT performance in preschoolers. METHOD Mothers and children recruited to the Health Outcomes and Measures of the Environment Study with(More)
Impairments in social interaction and communication are critical features of ASD but the underlying processes are poorly understood. An under-explored area is the social motor synchronization that happens when we coordinate our bodies with others. Here, we explored the relationships between dynamical measures of social motor synchronization and assessments(More)