1,720,987 research outputs found
Modulation of the cannabinoid system. a new perspective for the treatment of the Alzheimer's disease
No full textAbstract: The pathogenesis of Alzheimer’s disease (AD) is somewhat complex and has yet to be fully understood. As the effectiveness of the therapy currently available for AD has proved to be limited, the need for new drugs has become increasingly urgent. The modulation of the endogenous cannabinoid system (ECBS) is one of the potential therapeutic approaches that is attracting a grow- ing amount of interest. The ECBS consists of endogenous compounds and receptors. The receptors CB1 and CB2 have already been well characterized: CB1 receptors, which are abundant in the brain, particularly in the hippocampus, basal ganglia and cerebellum, regulate memory function and cognition. It has been suggested that the activation of CB1 receptors reduces intracellular Ca con- centrations, inhibits glutamate release and enhances neurotrophin expression and neurogenesis. CB2 receptors are expressed, though to a lesser extent, in the central nervous system, particularly in the microglia and immune system cells involved in the release of cytokines. CB2 receptors have been shown to be upregulated in neuritic plaque-associated microglia in the hippocampus and entorhinal cortex of patients, which suggests that these receptors play a role in the inflammatory pathology of AD. The role of the ECBS in AD is supported by cellular and animal models. By contrast, few clinical studies designed to investigate therapies aimed at reducing behaviour disturbances, espe- cially night-time agitation, eating behaviour and aggressiveness, have yielded positive results. In this review, we will describe how the manipulation of the ECBS offers a potential approach to the treatment of AD
Chronic treatment with rivastigmine does not modify primary cortex synaptic plasticity in patients with Alzheimer’s disease (AD): a rTMS study
No full textDiffusion tensor imaging (DTI) study of a trigeminal neuralgia due to large venous angioma
No full text[No abstract available
"A rare case of symptomatic trigeminal neuralgia in a patient with a brainstem venous angioma studied with structural and functional MRF"
No full textRepetitive Deep Transcranial Magnetic Stimulation Improves Verbal Fluency and Written Language in a Patient with Primary Progressive Aphasia-Logopenic Variant (LPPA)
No full textBackground: To date, no therapies are available for the logopenic variant of primary progressive aphasia (LPPA). Even though deep repetitive transcranial magnetic stimulation (rTMS) may improve cognitive functions in some neurodegenerative disorders, no previous studies investigated its effects in patients with LPPA. Objective: Our aim was to investigate the effects on cognitive function of high frequency rTMS (hf-rTMS) delivered over the left dorso-lateral prefrontal cortex (DLPFC) through a coil designed for deep rTMS, compared to a SHAM stimulation, in a right-handed patient with LPPA. Methods: The patient presented a progressive language impairment (phonological errors in speech and naming, impaired single word retrieval and sentences repetition) and predominant left perisylvian atrophy and hypoperfusion. He received four stimulation cycles (two REAL and two SHAM) each of whom lasted 20 min for 5 consecutive days. Patient's performances in frontal, visuo-spatial and linguistic tasks were evaluated before and after each stimulation session. Test scores after REAL were compared with those obtained at baseline and after SHAM. Results: We found a temporary and highly significant improvement in the linguistic skills (both oral and written tasks) but not in the other cognitive domains tested, after REAL, but not SHAM stimulations. Discussion: Hf-rTMS delivered over the DLPFC could improve language in LPPA by enhancing long-term potentiation and synaptic plasticity within the stimulated and interconnected areas involved in language network. Our findings might prompt future researches into the feasibility and efficacy of deep hf-rTMS as a therapeutic tool in progressive aphasia syndromes and other neurodegenerative disorders. (C) 2013 Elsevier Inc. All rights reserved
"Management of psychomotor agitation in hospitalized patients with dementia: the need for specific guidelines"
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Seizures in Alzheimer's disease: a retrospective study of a cohort of outpatients.
No full textPurpose. The aim of our study was to define the frequency of seizures in a population of outpatients attending a cognitive function clinic in Italy and to identify risk factors for seizures in patients with Alzheimer's disease. Methods. In this retrospective study, we analyzed our clinical records to gather information on patients' demographic, metabolic, cardiovascular and cognitive features. We sought to determine the significance of abnormal neuroimaging findings and the use of potentially epileptogenic drugs on the onset of seizures. From the records of 583 patients referred to the clinic for cognitive disturbances, we identified 145 patients with Alzheimer's disease. Results. Of these 145 patients, 14 (9.7%) had a history of complex partial or generalised seizures, or both. Of the risk factors identified, onset of seizures was associated with male gender and none of the patients with seizures had diabetes. The risk of seizure onset was higher in Alzheimer's disease patients with hyperlipaemia and severe dementia. No other risk factors were identified, although hypertensive patients seemed to be protected. Conclusions. Seizures in Alzheimer's disease are frequent and often under-recognized. In elderly patients, especially those with Alzheimer's disease, correct diagnosis and treatment are important to prevent disease from worsening and disability from increasing. Patients with dementia should routinely undergo history-taking designed to elicit a history of seizures and define patients at high risk
Progressive language impairment in an English-Italian bilingual woman with Alzheimer's disease: an eighteen-month follow-up
No full textNo abstract is availabl
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