Background: Delay eyeblink conditioning (dEBC) is widely used to assess cerebellar-dependent associative motor learning, including precise timing processes. Transcranial direct current stimulation (tDCS), noninvasive brain stimulation used to indirectly excite and inhibit select brain regions, may be a promising tool for understanding how functional integrity of the cerebellum influences dEBC behavior.Objective/Hypothesis: The aim of this study was to assess whether tDCS-induced inhibition (cathodal) or excitation (anodal) of the cerebellum impairs or facilitates, respectively, timing of dEBC.Methods: A standard 10-block dEBC paradigm was administered to 102 healthy participants. Participants were randomized to stimulation conditions in a double-blind, between-subjects shamcontrolled design. Participants received 20-minute active (anodal or cathodal) stimulation at 1.5mA (n=20 anodal, n=22 cathodal) or 2mA (n=19 anodal, n=21 cathodal) or sham (n=20) stimulation concurrently with dEBC training. Stimulation intensity and polarity effects on percent conditioned responses (CRs) and CR peak and onset latency were examined using repeated measures analyses of variance.Terms of use and reuse: academic research for non-commercial purposes, see here for full terms. http://www.springer.com/gb/openaccess/authors-rights/aam-terms-v1

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1012 patients underwent CTA. 72 of these patients were found to have BCVI, 51 of which were in the external cohort. Across all data groups, the McGovern score has a >80% sensitivity and >98% NPV.CONCLUSIONS: The McGovern score is an effective and generalizable screening tool for pediatric BCVI.

The mismatch negativity (MMN) event-related potential (ERP) indexes relatively automatic detection of changes in sensory stimuli and is typically attenuated in individuals with schizophrenia. However, contributions of different frequencies of electroencephalographic (EEG) activity to the MMN and the later P3a attentional orienting response in schizophrenia are poorly understood and were the focus of the present study. Participants with a schizophrenia-spectrum disorder ( n = 85) and non-psychiatric control participants ( n = 74) completed a passive auditory oddball task containing 10% 50 ms “deviant” tones and 90% 100 ms “standard” tones. EEG data were analyzed using spatial principal component analysis (PCA) applied to wavelet-based time-frequency analysis and MMN and P3a ERPs. The schizophrenia group compared to the control group had smaller MMN amplitudes and lower deviant-minus-standard theta but not alpha event-related spectral perturbation (ERSP) after accounting for participant age and sex. Larger MMN and P3a amplitudes but not latencies were correlated with greater theta and alpha time-frequency activity. Multiple linear regression analyses revealed that control participants showed robust relationships between larger MMN amplitudes and greater deviant-minus-standard theta inter-trial coherence (ITC) and between larger P3a amplitudes and greater deviant-minus-standard theta ERSP, whereas these dynamic neural processes were less tightly coupled in participants with a schizophrenia-spectrum disorder. Study results help clarify frequency-based contributions of time-domain (ie, ERP) responses and indicate a potential disturbance in the neural dynamics of detecting change in sensory stimuli in schizophrenia. Overall, findings add to the growing body of evidence that psychotic illness is associated with widespread neural dysfunction in the theta frequency band.

Background and Hypothesis: The opioid crisis continues to worsen in the United States with opioid overdose deaths reaching record highs in 2020. While a large body of literature exists surrounding the risks of opioids in adults, opioids also pose unique risks to pediatric patients, including accidental ingestion, nonmedical use, and acute cerebellitis causing death. Opioid medications prescribed in the medical setting are often an unwitting source of excess opioids, with half of pediatric overdoses in those under 2 years of age. Although legislative efforts have significantly limited opioid prescribing, recent studies suggest these medications may still be overprescribed. We hypothesized opioid medications are overprescribed to pediatric neurosurgery patients upon hospital discharge. Methods: Pediatric patients undergoing neurosurgical procedures at Riley Hospital for Children were identified prospectively. Surgery type, length of stay, and inpatient use of opioid medications were collected. Patients prescribed an opioid medication upon hospital discharge were contacted 7 days after discharge and asked to report the number of doses of opioid medication used. Results: Thirty patients were successfully contacted 7 days after hospital discharge. Patients underwent a variety of cranial and spinal procedures and the mean length of hospital stay was 3.9 days. An average of 24.9 doses of opioid medication were prescribed at hospital discharge, while an average of 3.8 doses were used by patients in the 7 days following hospital discharge. Twelve patients (40%) had used zero doses of the prescribed opioid medication at 7-day follow-up. Conclusions: Pediatric neurosurgery patients used only 15.3% of prescribed opioids in 7 days after hospital discharge. This creates an excess of leftover opioid medication that may increase the risk of accidental ingestion and misuse. The present study highlights the need for educational initiatives for providers to minimize excess opioids prescribed and for parents to safely dispose of leftover opioid medication.