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The goal of this research study is to learn how the brain areas that plan and control movement interact with the areas responsible for hearing and perceiving speech in healthy adults and people who have had cerebellar strokes. The main questions it aims to answer are: 1. What regions of the brain's sensory systems show changes in their activity related to speech? 2. To what extent do these regions help listeners detect and correct speech errors? 3. What is the role of the cerebellum (a part of the brain in the back of the head) in these activities? Participants will be asked to complete several experimental sessions involving behavioral speech and related tests and non-invasive brain imaging using electroencephalography (EEG) and functional magnetic resonance imaging (fMRI).
The purpose of this pilot study is to investigate the efficacy of medical play in the dental setting to improve the behaviors and cooperation of neurotypical patients during dental visits. The specific aims of the study are as follows: 1. To evaluate differences in behaviors and cooperation levels of subjects utilizing medical play before a routine dental exam visit in comparison to those undergoing a routine dental exam visit without use of medical play. 2. To evaluate whether subjects who have a dental exam visit, with or without use of medical play, show improved behaviors and improved completion of components of the dental exam compared to their previous routine dental visit. 3. To evaluate provider perceptions of the behavior and cooperation of children using medical play before dental exam visits compared to dental exam visits without medical play. 4. To evaluate caregiver perceptions of the behavior and cooperation of children using medical play before dental exam visits compared to dental exam visits without medical play. 5. To evaluate patient perceptions of the dental exam, visit when medical play is used in comparison to dental exam visits without medical play. The hypotheses are as follows: 1. Subjects will have increased positive behaviors and improved cooperation during dental exam visits when medical play is utilized beforehand. 2. Providers will report improved behavior and cooperation from patients when medical play is utilized beforehand. 3. Parents will report improved behavior and cooperation from their children and report greater satisfaction with the dental visit when medical play is utilized beforehand. 4. Patients will report experiencing less anxiety, via the Modified Child Dental Anxiety Scale - Faces Version (MCDAS-f) after appointments in which medical play is utilized.
Persistent developmental stuttering affects more than three million people in the United States, and it can have profound adverse effects on quality of life. Despite its prevalence and negative impact, stuttering has resisted explanation and effective treatment, due in large part to a poor understanding of the neural processing impairments underlying the disorder. The overall goal of this study is to improve understanding of the brain mechanisms involved in speech motor planning and how these are disrupted in neurogenic speech disorders, like stuttering. The investigators will do this through an integrated combination of experiments that involve speech production, functional MRI, and non-invasive brain stimulation. The study is designed to test hypotheses regarding the brain processes involved in learning and initiating new speech sound sequences and how those processes compare in persons with persistent developmental stuttering and those with typical speech development. These processes will be studied in both adults and children. Additionally, these processes will be investigated in patients with neurodegenerative speech disorders (primary progressive aphasia) to further inform the investigators understanding of the neural mechanisms that support speech motor sequence learning. Together these experiments will result in an improved account of the brain mechanisms underlying speech production in fluent speakers and individuals who stutter, thereby paving the way for the development of new therapies and technologies for addressing this disorder.
This is a single-arm, two-visit, non-randomized, cross sectional study identified as an intervention due to the use of a single bout of aerobic exercise to assess cerebrovascular function under the NIH rules. This study is not masked and its primary purpose is to develop a basic science understanding of the relationship between cerebrovascular health and balance control with aging. This study will involve 102 individuals classified as younger adults, middle-aged adults, and older adults who are neurotypical and cognitively normal. The primary outcome from a clinical trials perspective will be cerebrovascular response to a bout of aerobic exercise (i.e. change in cerebral blood flow with the performance of aerobic exercise on a recumbent stepper exercise machine). Non-interventional outcomes will be EEG measures of cortical activity and biomechanical kinetic and kinematic data recorded during standing balance reactions, as well as biological blood samples for genomic analysis.
This study examines the time course of activation of the left anterior temporal lobe (ATL) during lexical processing using Transcranial Magnetic Stimulation (TMS).