Publications by authors named "Eavan Mc Govern"

Psychiatric symptoms are common in neurodevelopmental movement disorders, including some types of dystonia. However, research has mainly focused on motor manifestations and underlying circuits. Myoclonus-dystonia is a rare and homogeneous neurodevelopmental condition serving as an illustrative paradigm of childhood-onset dystonias, associated with psychiatric symptoms.

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  • The study explores myoclonus dystonia caused by a variant in the SGCE gene, focusing on the microarchitectural brain abnormalities linked to this rare condition.
  • Researchers compared the brain structures of 18 MYC/DYT-SGCE patients with 24 healthy volunteers using advanced imaging techniques to assess neurite organization.
  • Results indicate that patients exhibited changes in cerebellar structure, with specific alterations correlating to the severity of dystonia, while no links were found between myoclonus severity and the microarchitectural measurements.
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  • This study investigates the non-motor aspects of myoclonus dystonia, focusing on the sense of agency, which is how individuals perceive control over their actions, and how disruptions in this sense can affect movement disorders.* -
  • The research compared 19 patients with myoclonus dystonia (stemming from a specific genetic variant) to 24 healthy participants, revealing that the patients had a significant impairment in their explicit sense of agency, while their implicit sense remained unaffected.* -
  • Neuroimaging analyses showed structural and functional abnormalities in the cerebellum and its connectivity with the pre-supplementary motor area, suggesting these brain regions play a crucial role in the altered sense of agency in patients with my
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Background: Movement disorders are frequent in patients with inborn errors of metabolism (IEMs) but poorly recognized, particularly by nonmovement disorder specialists. We propose an easy-to-use clinical screening tool to help recognize movement disorders.

Objective: The aim is to develop a user-friendly rapid screening tool for nonmovement disorder specialists to detect moderate and severe movement disorders in patients aged ≥4 years with IEMs.

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Background: Though uncommon, primary movement disorders can occur in pregnancy, the most common being restless legs syndrome and chorea gravidarum [1]. New onset dystonia in pregnancy has been reported four times previously with a resolution of symptoms within six months of delivery [2345]. Exacerbation of pre-existing movement disorders and the onset of de novo movement disorders during pregnancy support the hypothesis that female sex hormones play an important role in the regulation of basal ganglia circuitry.

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Autosomal dominant epilepsy with auditory features (OMIM 600512) is characterised by focal seizures with distinctive auditory auras and/or ictal aphasia. We describe a 17-year-old girl with recurrent attacks of ictal aphasia and rare nocturnal convulsions. She had a four-generation paternal family history of epilepsy.

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Long-term effects of continuous subcutaneous apomorphine infusion (CSAI) on health-related quality of life (HRQoL) and predictors of CSAI discontinuation are poorly known. Data from consecutive advanced Parkinson's disease patients treated in routine care were retrospectively collected over 24 months after CSAI initiation, with a focus on the 39-item Parkinson's disease questionnaire (PDQ-39). We determined predictors of CSAI discontinuation and HRQoL improvement using multiple regression analysis.

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Background: Neurophobia is a chronic disease of medical students and junior doctors. Early detection is needed to facilitate prevention and management as this fear can negatively impact patient care.

Methods: We conducted a two-part mono-centric study at the faculty of Medicine, Sorbonne University, in Paris.

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Objective: Progressive myelopathy causes severe handicap in men with adrenomyeloneuropathy (AMN), an X-linked disorder due to ABCD1 pathogenic variants. At present, treatments are symptomatic but disease-modifying therapies are under evaluation. Given the small effect size of clinical scales in AMN, biomarkers with higher effect size are needed.

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Childhood-onset movement disorders represent a heterogenous group of conditions. Given the complexity of these disorders, the transition of care from pediatric to adult medicine is an important consideration. We performed a scoping review of the literature on transitional care in chronic neurological disease, exploring key transitional issues and proposed transitional care models.

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Article Synopsis
  • Myoclonus-dystonia (MD) is a neurological syndrome involving muscle jerks and dystonia, often linked to mental health issues, caused by dysfunction in specific brain pathways.
  • A study using the Stop Signal Task examined the reactive and proactive inhibitory control in MD patients, comparing those with and without deep brain stimulation treatment to healthy controls.
  • Findings revealed that unoperated MD patients had impaired proactive inhibition, while those with deep brain stimulation had issues with reactive inhibition, indicating different effects on inhibitory control depending on the treatment status.
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Background: Abnormal temporal discrimination in cervical dystonia is hypothesized to be attributable to disrupted processing in the superior colliculus. The fast, luminance-based, retinotectal pathway, projects to the superior colliculus; chromatic stimuli responses, by the retino-geniculo-calcarine pathway, are up to 30 ms longer.

Objectives: We sought to interrogate visual processing and reaction times in patients with cervical dystonia compared with healthy controls.

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Understanding the neuronal network dynamics underlying the third most common movement disorder, cervical dystonia, can be achieved using dynamic causal modelling. Current literature establishes structures of the midbrain network for covert attentional orienting as dysfunctional in patients with cervical dystonia. One of these structures is the superior colliculus, for which it is hypothesised that deficient GABAergic activity therein causes cervical dystonia.

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Cervical Dystonia (CD) is a neurological movement disorder characterized by intermittent muscle contractions in the head and neck. The pathophysiology and neural networks underpinning this condition are incompletely understood. There is increasing evidence that isolated focal dystonias are due to network-wide functional alterations.

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Background: Abnormal sensory processing, including temporal discrimination threshold, has been described in various dystonic syndromes.

Objective: To investigate visual sensory processing in DYT-SGCE and identify its structural correlates.

Methods: DYT-SGCE patients without DBS (DYT-SGCE-non-DBS) and with DBS (DYT-SGCE-DBS) were compared to healthy volunteers in three tasks: a temporal discrimination threshold, a movement orientation discrimination, and movement speed discrimination.

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  • The study investigates the relationship between early-onset hyperkinetic movement disorders, specifically dyskinesia, and disturbances during sleep, aiming to determine if sleep issues are a primary disorder or a result of the movements.
  • Using video polysomnography, researchers analyzed sleep patterns and movements in 7 dyskinesia patients compared to 14 healthy controls, finding that abnormal movements were more common during specific sleep stages and morning awakenings.
  • Results indicated that while dyskinesia patients experienced lower sleep efficiency due to prolonged awakenings linked to abnormal movements, their sleep onset was quick and they did not show violent movements at that time, suggesting the sleep architecture remained normal.
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Objective: To characterize the full spectrum, relative frequency, and prognosis of the neurologic manifestations in Zika virus (ZIKV) postnatal infection.

Methods: We conducted an observational study in consecutive ZIKV-infected patients presenting with neurologic manifestations during the French West Indies 2016 outbreak.

Results: Eighty-seven patients, including 6 children, were enrolled.

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An abnormal temporal discrimination threshold in cervical dystonia (CD) is considered to be a mediational endophenotype; in unaffected relatives it is hypothesized to indicate non-manifesting gene carriage. The pathogenesis underlying this condition remains unknown. Investigation of the neural networks involved in disordered temporal discrimination may highlight its pathomechanisms.

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Background: "JUMP" is a multidisciplinary program based at the Pitie-Salpêtrière Hospital Paris that transitions young adults with chronic neurological conditions from paediatric to adult healthcare. Transitional care programs have been shown to improve medical, educational and psychosocial outcomes for adolescent patients.

Methods: Demographic details and health-related variables of all patients referred to the JUMP program were collected.

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Basic examination and diagnostic skills in neurology are important for every graduating medical student. However, a majority of medical students consider neurology as complex and difficult to master. We evaluate the impact a learner-friendly, innovative simulation-based training programme has on long-term retention and delayed recall of neurological semiology amongst third-year medical students from the University Pierre et Marie Curie in Paris, France.

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