View clinical trials related to Cerebral Lesion.
Filter by:The objective of this exploratory study is to elucidate the underlying cerebral mechanisms of cognitive deficits. To achieve this, the investigator will apply functional brain imaging techniques to patients suffering from cognitive deficits due to cerebral lesions. The investigator will employ a "single-case" approach, suitable for studying rare behavioral profiles such as acquired reading disorders (alexia) or visual perception impairments (agnosia). If necessary, the investigator will use multiple non-invasive imaging methods in the same patients, including: 1. Magnetic Resonance Imaging (structural and functional), renowned for its spatial resolution and the diverse information it provides, and 2. Electrophysiological methods (MEG and EEG), notable for their temporal resolution. The employed stimuli will consist of visual or auditory presentations of verbal material (words, sentences, numbers, etc.), potentially combined with the collection of simple vocal or motor responses (button presses). The results will be interpreted by integrating the neuropsychological analysis of the deficit and the lesion topography. Importantly, following the methodology of single-case neuropsychology, the stimulation protocols will be modulated and adapted to each individual case. Consequently, parallel data should be collected from healthy control subjects whenever necessary. For protocol development, the investigator will also collect purely behavioral data, without brain imaging, from groups of control subjects.
A single-arm pilot study, to assess the efficacy of cerebellar IMRT combined with cerebral SRS in patients with brain metastases that are predominantly in the posterior fossa - a novel treatment approach
Little is known about how implementation of prone position contributes to general anesthesia-induced decrease in cerebral blood flow in infants. The investigators investigated this question in participants undergoing untethering, hypothesizing that cardiorespiratory changes during this procedure would reduce cerebral perfusion.
This study is a case-control observational study, involving persons with multiple sclerosis and healthy controls. The study contains 1 descriptive and 4 experimental sessions. In the descriptive session, participant's clinical motor and cognitive functions are collected. In the first experimental session, participant's beat perception and synchronisation abilities is examined within a finger tapping paradigm. In the following experimental sessions participants synchronsiation abilities is examined during walking paradigms, to music and metronomes, at different tempi and alignment strategies. In the latter three sessions, apart from outcome measures of synchronization the following will be collected as well: spatio-temporal gait parameters, perceived fatigue, perceived motivation and perceived speed of walking.
The incidence of aggression and violent behavior is usually reported to be high after acquired brain injury, around 54%. Behaviors with verbal agression and, less frequently, physical agressions, are described. These behaviors may be linked to the dysfunction of the frontal lobes responsible for executive functions and complex social interactions, or to the dysfunction of the temporal structures that may also be responsible for increased aggression. It is interesting to note that very few scales or specific questionnaires evaluate the factors and co-variables that could lead to aggressive behavior after an acquired brain injury. Such questionnaires are very rare, and none have been validated in French. The objective of this study is to develop a questionnaire in French that aims to assess anger, hostility and aggression after acquired brain injury. The psychometric qualities of this questionnaire will be evaluated using the Rasch probabilistic model. The development of such a tool will be of major interest for clinical practice and future clinical research.
Hypoxic-ischaemic brain injury (HIBI) is the main cause of death in patients who are comatose after resuscitation from cardiac arrest. Current guidelines recommend to target a mean arterial pressure (MAP) above 65 mmHg to achieve an adequate organ perfusion. Moreover, after cardiac arrest, cerebral autoregulation is dysregulated and cerebral blood flow (CBF) depends on the MAP. A higher blood pressure target could improve cerebral perfusion and HIBI. Transcranial Doppler (TCD) is a non-invasive method to study CBF and its variations induced by MAP. The aim of this study is to test the feasibility of an early-goal directed hemodynamic management with TCD during the first 12 hours after return of spontaneous circulation (ROSC).
The principal purpose of this study is to describe the changes in cerebral circulation (assessed by transcranial ultrasound) and oxygenation (assessed by Near InfraRed spectroscopy, NIRS) during resuscitation for hemodynamic failure (arterial hypotension or shock) in critically ill children treated with vasoactive or inotropic drugs. The secondary objectives are : i) to evaluate the association between an alteration of cerebral circulation and/or oxygenation and an alteration in macro-circulatory parameters (Mean Arterial Blood Pressure and cardiac output) or a bad outcome, ii) to study if cerebral autoregulation is impaired
The withdrawal syndrome in benzodiazepines and morphine is common in intensive care, the incidence is estimated at 32.1%. Cerebrospatized patients are probably more prone to withdrawal because they require high doses of sedation. Moreover, this syndrome is probably deleterious on the cerebral hemodynamics (high point of the therapeutic management).