-
Mashup Score: 29
ecognizing cochlear implant artifacts will avoid misinterpretation and resultant inappropriate treatment….
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet
-
Mashup Score: 10SensorāHead Distance and Signal Strength in Whole-Head... : Journal of Clinical Neurophysiology - 3 month(s) ago
Methods: The MEG sensor array consisted of 102 measurement sites, each of which had two gradiometers and one magnetometer. The sensorāhead distance was defined as the minimum distance between each site and a set of digitized scalp points. For the signal strength, we calculated the root-mean-square of the signal values in each sensor over a recording of 4 minutes. For analyses at the individual and sensor levels, these values were averaged over the sensors and patients, respectively. We evaluated the correlation between distance and signal strength at both individual and sensor levels. At the sensor level, we investigated regional differences in these measures. Results: The individual-level analysis showed only a weak negative correlation between the sensorāhead distance and the signal strength. The sensor-level analysis demonstrated a considerably negative correlation for both gradiometers and magnetometers. The sensorāhead distances showed no significant differences between the region
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Tanaka (@naoro_official) et al show that MEG signal strength is inversely correlated with distance from the head to each sensor. Sensor-head distance for all sensors as a whole was not a factor affecting each signal's strength. š§²š§ @MGHMartinos @ACNS_org https://t.co/mnbOTrj78v https://t.co/Ae6l0WY7ZV
-
-
Mashup Score: 1Transcranial Direct Current Stimulation in Children With... : Journal of Clinical Neurophysiology - 3 month(s) ago
argeted brain areas in a polarity-specific manner. Purpose: To detect the effect of tDCS on anisometropic amblyopia. Methods: This is a randomized controlled trial conducted on 78 patients with anisometropic amblyopia from 4.5 to 12 years of age. All patients presented with monocular amblyopia. They were divided into three groups; each group received five sessions of tDCS (anodal tDCS, cathodal tDCS, and sham tDCS). The active electrode was placed over occipital midline and the reference over central midline. Pattern visual-evoked potentials and contrast sensitivity tests were conducted before, immediately after, and 1 week after tDCS. Results: The amplitude of P100 was significantly decreased immediately after and 1 week after cathodal tDCS. The latency of P100 immediately after and 1 week after anodal tDCS was significantly decreased and increased significantly after cathodal tDCS. The amplitude of P100 and maximum and minimum contrast sensitivities were significantly increased immed
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
New Article Alertšļøšš§ El Salmawy et al propose anodal tDCS over the visual cortex as a noninvasive modality for improving anisometropic amblyopia in children.Ā @ACNS_org Read more here: https://t.co/SoPNkWpUJW https://t.co/WtJnvtW3by
-
-
Mashup Score: 7
years, patients with epileptiform discharges were identified as follows: frontal (F = 176), temporal (T = 196), central (C = 201), parietal (P = 120), and occipital (O = 205). T-dipoles were documented. Clinical features of children with and without T-dipole were compared both regardless of brain region and separately for each brain region. Results: The prevalence of T-dipoles was 232/898 (25.8%) overall and within different regions as follows: T = 104 (53.1%), O = 51 (24.9%), P = 23 (19.2%), C = 35 (17.4%), and F = 19 (10.8%). Most had epilepsy (T-dipole: 193 [83.2%] and nondipole: 532 [79.9%]). Regardless of region, T-dipole was associated with less drug-resistant epilepsy (11 [4.7%] vs. 202 [30.3%], P < 0.001), developmental delay (57 [24.6%] vs. 436 [51.0%], P < 0.001), school performance difficulties (SPD) (101 [43.5%] vs. 410 [61.6%], P < 0.001), autism (30 [12.9%] vs. 127 [19.1%], P = 0.037), and abnormal examination (28 [12.1%] vs. 257 [38.6%], P < 0.001]). Within different bra
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Datta and Wong @UBCmedicine analyze pediatric patients with focal epileptiform discharges and find that tangential dipoles are associated with favorable prognosis, regardless of the region of discharge. šš§ ā”Learn more here: https://t.co/o10GwjURiI @ACNS_org https://t.co/UdjAuUF7nu
-
-
Mashup Score: 6Agreement and Consistency of Absolute and Relative... : Journal of Clinical Neurophysiology - 4 month(s) ago
pleted absolute (5% to 100% stimulator output) and relative (65% to 160% motor threshold) SRCs of the first dorsal interosseous, vastus lateralis, and rectus abdominis during submaximal isometric contractions. Mean motor-evoked potential amplitudes were fit with nonlinear regression to derive MEPmax, V50, and slope. Absolute agreement and consistency were assessed with ICCs, Cronbachs alphas, and BlandāAltman plots. Independent t-tests were used to examine differences in motor threshold, physical activity, strength, and muscle activity among participants with valid and invalid SRC parameters. Results: Absolute and relative SRCs displayed good agreement and consistency for MEPmax and V50 but not slope. Motor thresholds were lower among participants with valid absolute SRCs for the rectus abdominis and vastus lateralis. Motor threshold, physical activity, strength, and muscle activity did not differ among those with valid and invalid parameters for all relative SRCs and absolute SRCs for
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Hougland et al describe 30 healthy adults assessed with TMS to develop a corticospinal stimulus-response curve (SRC) with stimulation of the motor cortex to elicit contraction of FDI, vastus lateralis, and rectus abdominis. šŖš§²š¦µ #ClinNeurophys Read now: https://t.co/CFDGT7iFva https://t.co/9UJ5gIC7Iq
-
-
Mashup Score: 15Intraoperative Neuromonitoring for the Lower-Extremity... : Journal of Clinical Neurophysiology - 4 month(s) ago
s in the LE was performed in 18 cases (16 patients) for brain tumor surgery from December 2018 to April 2023 with a follow-up period of at least 3 months. After dural opening, a single six-contact subdural strip electrode was placed inside the interhemispheric fissure. To identify the central sulcus, phase reversal was recorded using somatosensory evoked potentials. Next, direct cortical stimulation was applied to the primary motor cortex. The baseline waveform was defined as a reproducible waveform of 30 ĀµV or higher, and a significant decrease of ā„50% in the amplitude resulted in a warning during surgery. Results: The success rate of central sulcus identification in the LE was 66.7% (12/18 cases). Direct cortical stimulation motor-evoked potential monitoring could record stable contralateral motor-evoked potentials of the tibialis anterior, gastrocnemius, and abductor hallucis in 16 of 18 cases (88.9%). The mean intensity of stimulation for D-MEPs was 20.5 Ā± 9.9 mA, and the 16 cases
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Takatani et al describe 18 cases of brain tumor surgeries undergoing monitoring of the interhemispheric fissure to evaluate lower extremity function with direct MEPs. ā”š§ š¦µ #IONM Available here: https://t.co/QtNpwTpe1H @ACNS_org https://t.co/K4Df4Zh9Am
-
-
Mashup Score: 12Current Issue : Journal of Clinical Neurophysiology - 4 month(s) ago
āThe Journal of Clinical Neurophysiology features both topical reviews and original research in both central and peripheral neurophysiology, as related to patient evaluation and treatment. Official Journal of the American Clinical Neurophysiology Society
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Issue AlertāļøOur 41.1 January Issue is now live and features a Topical Issue on #EEG Source Imaging (#ESI) edited by Jay Gavvala (@McGovernMed) and John Ebersole. Check it out here: https://t.co/mKyz4TiVVZ @ACNS_org https://t.co/cuTGcBTAlM
-
-
Mashup Score: 9A Multicenter Training and Interrater Reliability Study of... : Journal of Clinical Neurophysiology - 4 month(s) ago
and Epileptiform Discharges (BASED) score has shown promise for the reliable interictal assessment of infantile epileptic spasms syndrome. Our aim was to develop a BASED training program and assess the IRR among learners. We hypothesized moderate or better IRR for the final BASED score and the presence or absence of epileptic encephalopathy (+/āEE). Methods: Using a web-based application, 31 learners assessed 12 unmarked EEGs (length 1ā6 hours) from children with infantile epileptic spasms syndrome. Results: For all readers, the IRR was good for the final BASED score (intraclass correlation coefficient 0.86) and +/āEE (Marginal Multirater Kappa 0.63). For all readers, the IRR was fair to good for all individual BASED score elements. Conclusions: These findings support the use of our training program to quickly learn the BASED scoring method. The BASED score may be a valuable clinical and research tool. Given that the IRR for the determination of epileptic encephalopathy is not perfect,
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Mytinger et al. show support for the use of, and training on, the Burden of AmplitudeS and Epileptiform Discharges (BASED) score for interictal assessment and comparison of EEGs for infantile epileptic spasms syndrome and hypsarrhythmia. š§ š¶š§ @ACNS_org https://t.co/TJVFcfcs9K https://t.co/pd0pnM8ieK
-
-
Mashup Score: 9Resolving a āW-Shapedā P100 Waveform: Is It Normal or... : Journal of Clinical Neurophysiology - 5 month(s) ago
is āW-shaped,ā with positiveānegativeāpositive components. Although most often a W-shaped P100 waveform indicates an abnormality in the visual pathway, occasionally, it can be normal. A case is presented in which a W-shaped P100 waveform is seen after monocular full-field stimulation of both eyes with 30ā² checks. To resolve this finding, the pattern-reversal visual evoked potentials is repeated with 60ā² and 15ā² checks. With 15ā² checks a single typical single-peak P100 waveform is seen with normal latency. Evaluation of a W-shaped P100 waveform should involve analysis of various montages, stimulation with different check sizes, and hemifield stimulation to confirm whether the W-shaped waveform is normal or abnormal….
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Martin-Gonzalez and @DrAatifHusain report a case of VEP P100 waveforms which are "W-shaped". This can be an abnormal or normal finding due to different rates of optic pathway conduction, and adjusting settings can help resolve this. šļøā”š”https://t.co/jV4Y4kIzie @Duke_Neurology https://t.co/1q2S8IjbdT
-
-
Mashup Score: 6
An abstract is unavailable.
Source: journals.lww.comCategories: General Medicine News, NeurologyTweet-
Dr. Granger reviews "Neuromuscular Case Studies," (Bertorini) with excellent breadth of disorders, helpful images, and updated diagnostic and treatment approach. Informative for expert and inexperienced neuromuscular physicians šŖš¬ā” @spikewhisperer https://t.co/n9yxn6usdj https://t.co/yOGk7zq2AB
-
š§ New research on #CochlearImplants: "Cochlear Implant Artifacts in Continuous EEG" sheds light on the impact of implants on EEG recordings. A must-read for clinicians in #Neurophysiology and #Audiology! Read more here š https://t.co/5YfbFa2pfj #EEG #Epilepsy #ENT @ACNS_org https://t.co/6dVnnNXXcb