Ultrasonography (USG) is an excellent cost-effective modality in imaging of peripheral nerves. With the newer high-frequency probes with different footprints which allow high-resolution imaging at relatively superficial location, USG can detect and evaluate traumatic, inflammatory, infective, neoplastic, and compressive pathologies of the peripheral nerves. This article describes the technique for evaluation of nerves by USG as well as the USG appearances of normal and diseased peripheral nerves.
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http://dx.doi.org/10.4103/0971-3026.137037 | DOI Listing |
Introduction: Dynamic modulation of grip occurs mainly within the major structures of the brain stem, in parallel with cortical control. This basic, but fundamental level of the brain, is robust to ill-formed feedback and to be useful, it may not require all the perceptual information of feedback we are consciously aware. This makes it viable candidate for using peripheral nerve stimulation (PNS), a form of tactile feedback that conveys intensity and location information of touch well but does not currently reproduce other qualities of natural touch.
View Article and Find Full Text PDFCereb Cortex
December 2024
Baker Department of Cardiometabolic Health, The University of Melbourne, Grattan Street, Parkville, VIC 3010, Australia.
Transcranial magnetic stimulation (TMS) is applied both in research settings and clinically, notably in treating depression through the dorsolateral prefrontal cortex (dlPFC). We have recently shown that transcranial alternating current stimulation of the dlPFC partially entrains muscle sympathetic nerve activity (MSNA) to the stimulus. We, therefore, aimed to further explore the sympathetic properties of the dlPFC, hypothesizing that single-pulse TMS could generate de novo MSNA bursts.
View Article and Find Full Text PDFEur J Radiol
December 2024
Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Provincial Clinical Research Center for Precision Radiology & Interventional Medicine, Wuhan 430022, China; Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China. Electronic address:
Objects: To investigate the specific manifestations of neurogenic and non-neurogenic tumors involving peripheral nerves on contrast-enhanced magnetic resonance neurography (CE-MRN) and explore the potential of CE-MRN in aiding differential diagnosis.
Materials And Methods: Twenty-nine patients with neurogenic tumors and 23 with non-neurogenic tumors involving peripheral nerves were enrolled in this study. Both routine MRI and CE-MRN scanning were performed on all subjects.
J Physiol
December 2024
Division of Reconstructive and Plastic Surgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.
The frequent poor functional outcomes after delayed surgical repair of injured human peripheral nerves results in progressive downregulation of growth-associated genes in parallel with reduced neuronal regenerative capacity under each of the experimental conditions of chronic axotomy of neurones that remain without target contact, chronic distal nerve stump denervation, and chronic muscle denervation. Brief (1 h) low-frequency (20 Hz) electrical stimulation (ES) accelerates the outgrowth of regenerating axons across the surgical site of microsurgical repair of a transected nerve. Exercise programmes also promote nerve regeneration with the combination of ES and exercise being the most effective.
View Article and Find Full Text PDFJ Med Case Rep
December 2024
Department of Neurosurgery, The First Affiliated Hospital of Henan University of Science and Technology, 24 JingHua Road, Luoyang, 471000, Henan, China.
Background: Spinal schwannomas presenting with an intraspinal hematoma or subarachnoid hemorrhage are extremely rare, and patients often have severe spinal cord compression symptoms. However, the mechanism underlying the bleeding remains unclear.
Case Presentation: We present the case of a 53-year-old Chinese female diagnosed with a T12 schwannoma accompanied by an intratumoral hematoma.
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