Search results for "imulation"
showing 10 items of 7271 documents
Auditory cortical and hippocampal local-field potentials to frequency deviant tones in urethane-anesthetized rats: An unexpected role of the sound fr…
2015
Abstract The human brain can automatically detect auditory changes, as indexed by the mismatch negativity of event-related potentials. The mechanisms that underlie this response are poorly understood. We recorded primary auditory cortical and hippocampal (dentate gyrus, CA1) local-field potentials to serial tones in urethane-anesthetized rats. In an oddball condition, a rare (deviant) tone ( p = 0.11) randomly replaced a repeated (standard) tone. The deviant tone was either lower (2200, 2700, 3200, 3700 Hz) or higher (4300, 4800, 5300, 5800 Hz) in frequency than the standard tone (4000 Hz). In an equiprobability control condition, all nine tones were presented at random ( p = 0.11). Diffe…
Effect of ovarian stimulation with recombinant LH/ FSH, recombinant FSH and human menopausal gonadotrophin (hMG) in reducing apoptosis rate in cumulu…
2013
Intraoperative neural electrode for continuous monitoring of nerve function
2009
Nerve damage is still a major concern in all types of surgery and may result in permanent nerve injury. Real time nerve monitoring can reduce the risk of nerve lesions by continuous surveillance of nerve integrity. A stable proximal stimulation of the nerve and recording at the effector organ is essential and the electrodes should not significantly influence the surgical intervention.
Twitch interpolation during equal-intensity voluntary and electrically-evoked isometric contractions of the quadriceps muscle
2005
It has been suggested that, during contractions triggered by electrical stimulation, motor units are recruited in a reversed sequence compared to voluntary contraction. The classic view is that lar...
Stimulation of the sphenopalatine ganglion (SPG) for cluster headache (CH)-/INS;pathway CH-1 — /INS;Effectiveness and quality of life through 18 mont…
2013
Pathway CH-1 Study: Sphenopalatine Ganglion (SPG) Stimulation for Acute Treatment of Chronic Cluster Headache (CCH) - Initial Experience (S36.002)
2012
Objective: We aimed to investigate the safety and efficacy of SPG stimulation for the acute treatment of CCH. Background The pain and autonomic symptoms of cluster headache result from activation of the trigeminal parasympathetic reflex, mediated through the SPG. Design/Methods: A multi-center, dose range finding, multiple headache attack (HA), acute treatment study with random insertion of placebo has been initiated. All subjects meet the ICHD-II criteria for CCH with a minimum of 4 HAs/week. Subjects are implanted with a miniaturized neurostimulator which, along with a controller, provides SPG stimulation. Prior to the randomized period, stimulation parameters are adjusted in a titration …
Updated management of occipital nerve stimulator lead migration: case report of a technical challenge
2021
Abstract Electrode migration is a challenge, even with adequate anchoring techniques, due to the high mechanical stress on components of occipital nerve stimulation (ONS) for headache disorders. When a lead displacement of an ONS implant is diagnosed, there are currently different approaches described for its management. Nevertheless current neuromodulation devices are designed like a continuum of components without any intermediate connector, and if a lead displacement is diagnosed, the solution is the complete removal of the electrode from its placement, and its repositioning through an ex-novo procedure. The described technique can allow ONS leads to be revised while minimizing the need …
Innovative Educational Pathways in Spine Surgery: Advanced Virtual Reality–Based Training
2020
Background Over the past few years, a reorganization of the educational pathways has been promoted with the purpose of optimizing the acquisition of competences and their assessment, so as to reduce the risks to both health care professionals and end users. Virtual reality (VR) has been repeatedly tested, initially as a positive reinforcement for more traditional educational pathways and, more recently, as their potential substitute. The aim of this study was to demonstrate the potentiality of VR simulation training in spine surgery. Methods The VR simulator reproduced the lateral lumbar access to the spine. The simulation included a tutorial, the preoperative settings, and the surgical ses…