RESUMO
Objective: We aimed to describe a case of congenital microcephaly caused by Zika virus infection in a monozygotic twin pregnancy. Methods: Transfontanelle ultrasonography and cranial computed tomography revealed different lesion patterns for both twins with congenital microcephaly caused by Zika virus infection. Motor development assessments were performed using the Alberta Infant Motor Scale and the Gross and Motor Function Measure before, during, and after physiotherapy. Results: The evaluations showed differences in motor acquisition between the twins. The values in the first case were much lower than those in the second case, which showed more motor delay. Conclussion: The present study showed that despite the twins being monozygotic, the effects of neurological lesions as revealed by neuroimaging were worse in the first case, and even with two weekly rehabilitation sessions, motor development over time was considerably worse in the twin in case 1 than in the other twin.
Objetivo: Descrever um caso de microcefalia congênita causada pela infecção do Zika vírus em uma gestação gemelar monozigótica. Métodos: A ultrassonografia transfontanelar e a tomografia computadorizada de crânio revelaram diferentes padrões de lesão para ambos gêmeos com microcefalia congênita causada pela infecção do Zika vírus. As avaliações do desenvolvimento motor foram realizadas por meio da Escala Motora Infantil de Alberta (EMIA) e da Medida de Função Motora Grossa antes, durante e após o tratamento fisioterapêutico. Resultados: As avaliações mostraram diferenças na aquisição motora entre os gêmeos. Os valores nas avaliações do primeiro caso foram bem menores do que os do segundo caso, que apresentou maior atraso motor. Conclusão: O presente estudo mostrou que apesar dos gêmeos serem monozigóticos, os efeitos das lesões neurológicas reveladas por exames de neuroimagem foram piores no primeiro caso, e mesmo com duas sessões semanais de reabilitação, o desenvolvimento motor ao longo do tempo foi consideravelmente pior no gêmeo do caso 1 quando comparado ao caso 2.
RESUMO
BACKGROUND: Transcutaneous electrical nerve stimulation (TENS), manual acupuncture (MA), and spinal cord stimulation (SCS) are used to treat a variety of pain conditions. These non-pharmacological treatments are often thought to work through similar mechanisms, and thus should have similar effects for different types of pain. However, it is unclear if each of these treatments work equally well on each type of pain condition. The purpose of this study was to compared the effects of TENS, MA, and SCS on neuropathic, inflammatory, and non-inflammatory pain models. METHODS: TENS 60 Hz, 200 µs, 90% motor threshold (MT), SCS was applied at 60 Hz, an intensity of 90% MT, and a 0.25 ms pulse width. MA was performed by inserting a stainless-steel needle to a depth of about 4-5 mm at the Sanyinjiao (SP6) and Zusanli (ST36) acupoints on a spared nerve injury (SNI), knee joint inflammation (3% carrageenan), and non-inflammatory muscle pain (intramuscular pH 4.0 injections) in rats. Mechanical withdrawal thresholds of the paw, muscle, and/or joint were assessed before and after induction of the pain model, and daily before and after treatment. RESULTS: The reduced withdrawal thresholds were significantly reversed by application of either TENS or SCS (P < 0.05). MA, on the other hand, increased the withdrawal threshold in animals with SNI and joint inflammation, but not chronic muscle pain. CONCLUSIONS: TENS and SCS produce similar effects in neuropathic, inflammatory and non-inflammatory muscle pain models while MA is only effective in inflammatory and neuropathic pain models.
RESUMO
The rat saphenous nerve contains only somato-sensory fibers and is used in investigations of neuropathic pain and its treatment. Due to its superficial anatomical path, the saphenous nerve is also widely used in electrophysiological studies. Nevertheless, morphologic and morphometric descriptions of the normal saphenous nerve are scanty in the literature and information on useful morphometric parameters of this nerve is still missing. Thus, the present study aimed to investigate the longitudinal and lateral symmetry of the saphenous nerve in young rats. Proximal and distal segments of the left and right saphenous nerves from female Wistar rats, aged 30 days (N=5) were morphometrically evaluated and comparisons were made between sides and segments. Our results show that the saphenous nerve is longitudinally and laterally symmetric since there were no morphometric differences between proximal and distal segments, as well as between right and left sides. This lateral symmetry is important in order to validate those experiments in which the contralateral nerve is used as the control. Also, the longitudinal symmetry information is fundamental to further studies involving the "dying back" neuropathy models. The present study adds to the literature new morphometric information on the rat saphenous nerve that might be useful for a better interpretation of further studies involving this nerve and experimental models of nerve diseases.
Assuntos
Nervo Femoral/anatomia & histologia , Animais , Animais Recém-Nascidos , Feminino , Nervo Femoral/fisiologia , Lateralidade Funcional , Fibras Nervosas/classificação , Fibras Nervosas/fisiologia , Ratos , Ratos WistarRESUMO
The innervation within mammalian kidneys (intrinsic innervation) has been extensively described in the literature, particularly for rats. In contrast, there is still a lack of detailed description of the morphology of the extrinsic renal nerves leading to the kidney. The aim of the present study was to describe, in detail, the morphology of the renal nerves in rats. Left renal nerves were evaluated in 6 normal adult Wistar rats. After nerve recordings, in order to ascertain that the nerves studied were the extrinsic renal nerves, rats were killed and the nerves prepared for transmission electron microscopy. Morphometry was carried out with the aid of computer software. The total numbers of myelinated and unmyelinated fibers were 22+/-6 and 1246+/-110, respectively, with a ratio of unmyelinated/myelinated fiber of 109+/-26. The diameters of myelinated fibers showed an unimodal distribution with a peak at 3.0 microm but more than 17% of the fibers showed diameters larger than 5 microm. Unmyelinated fiber distribution was unimodal, with peak between 0.5 and 0.7 microm. The present study adds new information on the morphology of renal nerves in rats and provides morphological basis for further studies involving the structural basis of altered renal responses in conditions such as hypertension, ageing, diabetes and peripheral neuropathies.