ABRAHAO FONTES BAPTISTA
Projetos de Pesquisa
Unidades Organizacionais
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/54 - Laboratório de Bacteriologia, Hospital das Clínicas, Faculdade de Medicina
LIM/54 - Laboratório de Bacteriologia, Hospital das Clínicas, Faculdade de Medicina
2 resultados
Resultados de Busca
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- Sickle cell disease chronic joint pain: Clinical assessment based on maladaptive central nervous system plasticity(2022) LOPES, Tiago da Silva; BALLAS, Samir K.; SANTANA, Jamille Evelyn Rodrigues Souza; MELO-CARNEIRO, Pedro de; OLIVEIRA, Lilian Becerra de; SA, Katia Nunes; LOPES, Larissa Conceicao Dias; SILVA, Wellington dos Santos; LUCENA, Rita; BAPTISTA, Abrahao FontesChronic joint pain (CJP) is among the significant musculoskeletal comorbidities in sickle cell disease (SCD) individuals. However, many healthcare professionals have difficulties in understanding and evaluating it. In addition, most musculoskeletal evaluation procedures do not consider central nervous system (CNS) plasticity associated with CJP, which is frequently maladaptive. This review study highlights the potential mechanisms of CNS maladaptive plasticity related to CJP in SCD and proposes reliable instruments and methods for musculoskeletal assessment adapted to those patients. A review was carried out in the PubMed and SciELO databases, searching for information that could help in the understanding of the mechanisms of CNS maladaptive plasticity related to pain in SCD and that presented assessment instruments/methods that could be used in the clinical setting by healthcare professionals who manage chronic pain in SCD individuals. Some maladaptive CNS plasticity mechanisms seem important in CJP, including the impairment of pain endogenous control systems, central sensitization, motor cortex reorganization, motor control modification, and arthrogenic muscle inhibition. Understanding the link between maladaptive CNS plasticity and CJP mechanisms and its assessment through accurate instruments and methods may help healthcare professionals to increase the quality of treatment offered to SCD patients.
- Electroacupuncture modulates cortical excitability in a manner dependent on the parameters used(2022) BRITO, Francisco Xavier de; LUZ-SANTOS, Cleber; CAMATTI, Janine Ribeiro; FONSECA, Rodrigo Jorge de Souza da; SUZARTH, Giovana; MORAES, Laise Monteiro Campos; SILVA, Marcelo Lourenco da; SILVA, Josie Resende Torres da; VERCELINO, Rafael; SA, Katia Nunes; ZANA, Yossi; BAPTISTA, Abrahao FontesIntroduction: There is evidence that electroacupuncture (EA) acts through the modulation of brain activity, but little is known about its influence on corticospinal excitability of the primary motor cortex (M1). Objective: To investigate the influence of EA parameters on the excitability of M1 in healthy individuals. Methods: A parallel, double blind, randomized controlled trial in healthy subjects, evaluating the influence of an EA intervention on M1 excitability. Participants had a needle inserted at LI4 in the dominant hand and received electrical stimulation of different frequencies (10 or 100 Hz) and amplitude (sensory or motor threshold) for 20 min. In the control group, only a brief (30 s) electrical stimulation was applied. Single and paired pulse transcranial magnetic stimulation coupled with electromyography was applied before and immediately after the EA intervention. Resting motor threshold, motor evoked potential, short intracortical inhibition and intracortical facilitation were measured. Results: EA increased corticospinal excitability of M1 compared to the control group only when administered with a frequency of 100 Hz at the sensory threshold (p < 0.05). There were no significant changes in the other measures. Conclusion: The results suggest that EA with an intensity level at the sensorial threshold and 100 Hz frequency increases the corticospinal excitability of M1. This effect may be associated with a decrease in the activity of inhibitory intracortical mechanisms.