Luiz Felipe Vasconcellos

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The frequency of myopathy in hypothyroidism ranges from 30 to 80%. The major symptoms related are weakness, muscular cramps and myalgia. The pseudohyperthrophic form is called Hoffman's syndrome. The electrophysiological study reveals myopathy, neuropathy or mixed pattern. Laboratorial investigation generally shows increased levels of muscle enzymes and low(More)
The manifestations of mitochondrial disease are variable, affecting more frequently the organs with high aerobic metabolism in which they are more abundant, for example the nervous system. The beginning of symptoms in general is observed at childhood, but some patients presented on adult age. We present an atypical case associated with mitochondrial DNA(More)
BACKGROUND Amongst Parkinson's disease-causing genetic factors, missense mutations and genomic multiplications in the gene encoding α-synuclein are well established causes of the disease, although genetic data in populations with a high degree of admixture, such as the Brazilian one, are still scarce. METHODS In this study, we conducted a molecular(More)
Severity of Parkinson's disease (PD) and frontal impairment are positively correlated. Testing frontal functions in depressed/nondepressed PD patients with different severity stages may reveal whether depression leads to this impairment. We aimed to relate severity of PD to frontal functional impairment and to test if negative stimuli/depressive symptoms(More)
INTRODUCTION Amongst Parkinson's disease (PD) genetic factors, mutations in LRRK2, SNCA, VPS35 and GBA genes are recognized causes of PD. Nonetheless, few genetic screenings have been conducted in families with a history of PD consistent with autosomal dominant inheritance (ADPD), and their relevance to the etiology of PD has been poorly explored in Latin(More)
The differential diagnosis of Parkinsonism based on clinical features, sometimes may be difficult. Diagnostic tests in these cases might be useful, especially magnetic resonance imaging, a noninvasive exam, not as expensive as positron emission tomography, and provides a good basis for anatomical analysis. The magnetic resonance spectroscopy analyzes(More)
Vitamin B12 deficiency may induce neuropathy, myelopathy, dementia and optic neuropathy. The diagnosis is established by vitamin B12, homocysteine and methylmalonic acid measurements. Myelin and axon destruction in the white matter of the spinal cord are observed. The posterior column of the cervical and thoracic level is the most common involved area. The(More)
We described a patient with Harlequin syndrome, a rare neurological condition, characterized by unilateral facial sweating and flushing, who had a good response to botulinum toxin application. She had been submitted to sympathectomy a few years, however she still complained of excessive sweating in the regions mentioned and intense flushing.
Organophosphate induced delayed neuropathy (OPIDN) is an uncommon clinical condition. It occurs in association with the ingestion of great amounts of organophosphate after the stimulation of cholinergic receptor. The clinical picture is characterized by a distal paresis in lower limbs associated with sensitive symptoms. Electrodiagnostic studies show a(More)