Analyzing direct effects of education level and estimated IQ between cognitively intact Mexican Americans and Non-Hispanic whites on a confrontational naming task.

Confrontational naming is widely used in diagnosing neurodegenerative disorders like MCI and dementia, and previous research indicates that healthy Non-Hispanic Whites outperform Hispanics in such tasks. However, understanding the factors contributing to score differences among ethnic groups remains limited. This study focuses on cognitively intact Mexican Americans and Non-Hispanic White older adults from the TARCC Hispanic Cohort project. Hierarchical regression analyses reveal that sex, age, ethnicity, education level, and estimated IQ significantly predict performance on the Boston Naming Test (BNT). Notably, education level and estimated IQ more strongly influence BNT performance in Mexican Americans than in Non-Hispanic Whites. When controlling for education level, estimated IQ has a more pronounced impact on BNT performance in aging Mexican Americans compared to Non-Hispanic Whites. Conversely, after controlling for estimated IQ, the influence of education level is weaker for Mexican Americans than Non-Hispanic Whites. These findings emphasize the need for careful evaluation of confrontational naming task scores in diverse ethnic groups, emphasizing the critical role of education and estimated IQ in understanding performance disparities.

An analysis of racial inequities in emergency department triage among patients with stroke-like symptoms in the United States.

BACKGROUND: Racial inequities exist in treatment and outcomes in patients with acute stroke. OBJECTIVES: Our objective was to determine if racial inequities exist in the time-lapse between patient presentation and provider assessment in patients with stroke-like symptoms in Emergency Departments (ED) across the U.S. METHODS: This study is a retrospective, observational study of the National Hospital Ambulatory Medical Care Survey (NHAMCS) 2014-2018. We identified visits with stroke-like symptoms and stratified the proportion of door-to-provider (DTP) times by racial groups. We used broad and narrow definitions of stroke-like symptoms. We performed bivariate and multivariate analyses using race and clinical and demographic characteristics as covariates. RESULTS: Between 2014-2018, there were an average of 138.58 million annual ED visits. Of the total ED visits, 0.36% to 7.39% of the ED visits presented with stroke-like symptoms, and the average DTP time ranged from 39 to 49 min. The proportion of the visits with a triage level of 1 (immediate) or 2 (emergent) ranged from 16.03% to 23.27% for stroke-like symptoms. We did not find statistically significant racial inequities in DTP or ED triage level. We found significantly longer DTP times in non-Hispanic blacks (15.88 min, 95% CI: 4.29-27.48) and Hispanics (by 14.77 min, 95% CI: 3.37-26.16) than non-Hispanic whites that presented with atypical stroke-like symptoms. We observed that non-Hispanic whites were significantly more diagnosed with a stroke/TIA than other racial minority groups (p = 0.045) for atypical stroke-like symptoms. CONCLUSION: In our population-based analysis, we did not identify systemic racial inequities in the DTP times or ED triage level at ED triage for stroke-like symptoms.

Validity of the Clinical Dementia Rating Scale Sum of Boxes in Staging and Detection of Cognitive Impairment in Mexican Americans.

OBJECTIVE: We evaluated the utility of the Clinical Dementia Rating Sum of Boxes score (CDR-SB) in staging and detecting amnestic-mild cognitive impairment (a-MCI) and Alzheimer's disease (AD) among Mexican Americans. METHODS: Receiver operator curves were generated to evaluate the validity of the CDR-SB in staging and detecting a-MCI and AD in 1,073 Mexican Americans (758 controls, 163 a-MCI, and 152 AD). RESULTS: Optimal ranges of the CDR-SB were 0, 0.5-4, 4.5-8.0, 8.5-13 and 13.5-18 for staging the global CDR score of 0, 0.5, 1, 2, and 3, respectively. The CDR-SB ≥ 0.5 differentiated the a-MCI patients from the controls (sensitivity 100% and specificity 99.5%) and ≥ 2.0 distinguished the AD from a-MCI patients (sensitivity 83.6% and specificity 87.1%). These cutoffs were also appropriate for patients with ≤6 years of education. CONCLUSION: The CDR-SB is useful to detect and stage a-MCI and AD in Mexican Americans with diverse education levels.

Antihypertensive use for stroke in United States emergency departments.

OBJECTIVE: Timely emergency department (ED) control of hypertension in the acute phase of stroke is associated with improved outcomes. It is unclear how emergency physicians use antihypertensive medications to treat severe hypertension associated with stroke. We sought to determine national patterns of antihypertensive use associated with ED visits for stroke in the United States. METHODS: We analyzed data from the National Hospital Ambulatory Medical Care Survey (NHAMCS) 2008-2017. We included ED visits associated with ischemic stroke (ICD9 433-434, ICD10 I630-I639) or hemorrhagic stroke (ICD9 430-432, ICD10 I600-I629). We estimated the number and proportions of stroke ED visits with triage blood pressure meeting treatment thresholds (triage systolic blood pressure [SBP] ≥180 mm Hg). We identified the frequency of antihypertensive use, as well as the most commonly used agents. RESULTS: Between 2008-2017, of a total 135,012,819 ED visits, 619,791 were associated with stroke (78.3% ischemic strokes and 21.7% hemorrhage strokes). Of all stroke visits, 21.8% received antihypertensive medications. Of the identified visits, 9.0% (95% confidence interval [CI] = 6.0%, 13.1%) ischemic stroke visits and 58.2% (95% CI = 49.0%, 66.9%) hemorrhagic stroke visits met criteria for BP reduction. A total of 47.6% (95% CI = 29.1%, 66.7%) of eligible ischemic stroke visits and 41.5% (95% CI = 30.5%, 53.3%) of eligible hemorrhagic strokes visits received antihypertensives. The most common agents used in ischemic stroke were beta-blockers, calcium-channel blockers, and ACE inhibitors. The most common agents used in hemorrhagic stroke included calcium-channel blockers, beta-blockers, and vasodilators. CONCLUSION: In this national sample, less than half of strokes presenting to the ED with hypertension received antihypertensive therapy.

Isolated left posterior insular infarction and convergent roles in verbal fluency, language, memory, and executive function.

The posterior insular cortex-a complex structure interconnecting various brain regions for different functions-is a rare location for ischemic stroke. We report a patient with isolated left posterior insular infarction who presented with multiple cognitive impairment, including impairment in semantic and phonemic verbal fluency.

Topiramate-induced hyperammonemic encephalopathy in a patient with mental retardation: A case report and review of the literature.

Hyperammonemia is an uncommon side effect of topiramate (TPM) that has only been reported when it is used as an adjunct to valproate. We report a patient with mental retardation who developed reversible encephalopathy from TPM. Ammonia level was monitored during the course of TPM treatment. This patient had recurring, reversible elevations in serum ammonia levels that coincided with the administration of TPM. To our knowledge, symptomatic hyperammonemia has not been reported to occur with TPM monotherapy.

Pupil to limbus ratio: Introducing a simple objective measure using two-box method for measuring early anisocoria and progress of pupillary change in the ICU.

INTRODUCTION: Measurement of static pupillary size in the ICU is of importance in cases of acutely expanding intracranial mass lesions. The inaccuracies with subjective assessment of pupillary size by medical personnel preclude its use in emergent neurological situations. OBJECTIVE: To determine if the ratio of pupil to limbus diameter (PLD ratio) measured by a two-box method is a reliable measure of pupil size for detecting early anisocoria and measuring pupillary changes. MATERIALS AND METHODS: The PLD ratio was defined as the ratio of the pupillary diameter measured at a para-horizontal axial plane with the limbus diameter measured at the same or parallel axial plane. A two-box method was used to estimate the diameters of imaged pupils. Eyes were imaged using an iPhone 4S cellphone camera. Background illumination was measured and kept constant. The pupils of a 78-year-old woman, who presented with a large intra-axial parenchymal hemorrhage, were imaged. The patient had left pupillary miosis in dark but not in bright light. After presenting this case along with the images of the pupillary examination, a group of 21 medical staff were asked several questions on the pupillary examination. Reliability of PLD ratio were assessed via standard error of mean (S.E.M) of PLD ratios for 3 different subjects each imaged under constant illumination and fixation but from different angles to the optical axis. RESULTS: Analysis of questionnaire data together with PLD ratios revealed that ~ 14% and 10% of participants could estimate the pupillary size in darkness and bright light respectively but none were simultaneously accurate indicating that subjective assessment of pupillary size was unreliable. The approach towards a systematic pupillary examination was inconsistent among the participants. The PLD ratio was found to be a reliable measure of pupillary size with standard error of mean below 0.1 mm for the three subjects tested. CONCLUSION: Static pupillary sizes can be objectively and consistently evaluated using PLD ratios using a two-box method. PLD ratios are resistant, within limits, to changes in imaging angle or choice of para-horizontal axes for measurement.

Pathophysiological processes in multiple sclerosis: focus on nuclear factor erythroid-2-related factor 2 and emerging pathways.

Multiple sclerosis (MS) is a disease of the central nervous system that is characterized by the demyelination of neuronal axons. Four different patterns of demyelination have been described, showing the heterogeneity in the immunopathologic processes involved in the demyelination. This review will focus on reactive oxygen species (ROS)-related inflammation in MS. Special emphasis will be placed on the nuclear factor erythroid-2-related factor 2 (Nrf2) as it regulates the transcription of ROS-protective genes. In the cytosol, Nrf2 binds to Keap1 (Kelch-like ECH-associated protein 1), and together they are degraded by the 26S proteasome after ubiquitination. If challenged by ROS Nrf2, binding to Keap1 is abrogated, and it translocates into the nucleus. Here it binds to the antioxidant response element and to a small protein termed Maf (musculoaponeurotic fibrosarcoma oncogene homolog). This leads to an enhanced transcription of ROS protective genes and represents the physiological answer against ROS challenge. It has been shown that dimethyl fumarate (DMF) has the same effect and leads to an enhanced transcription of ROS-protective genes. This response is mediated through a reduced binding of Nrf2 to Keap1, thus resulting in a higher level of free Nrf2 in the cytosol. Consequently, more Nrf2 translocates to the nucleus, promoting transcription of its target genes. DMF has been used for the treatment of psoriasis for many years in Germany without the occurrence of major side effects. In psoriasis, DMF reduces ROS-related inflammation in skin. A DMF analog, BG-12, was recently approved for the treatment of relapsing-remitting MS by the European Union and the US Food and Drug Administration. As an oral formulation, it gives patients a convenient and effective alternative to the injectable immune modulators in the long-term treatment of MS.

Pregnancy in epilepsy: issues of concern.

Every pregnancy, even under the best of circumstances, carries risks with it. Having epilepsy and taking medications to treat seizures further increase these risks and not all patients are willing to accept risks. The issues related to pregnancy, epilepsy, and antiepileptic drugs and pregnancy are fraught with confusion and misperceptions. Lay publications may misinform the public by assigning risks to drugs not known to be teratogenic in humans. Women report that their physicians have encouraged them to terminate otherwise wanted pregnancies "just to be on the safe side" which is clearly an excess of caution. In this chapter, we review the most common risk factors and divide them in two broad categories: (a) avoidable or modifiable risk factors and (b) unavoidable or non modifiable risk factors. Physicians counseling women with epilepsy who are pregnant or are planning a pregnancy should make every effort to understand the nature and magnitude of the risks associated with epilepsy and antiepileptic drugs in order to ensure the best possible outcomes in these cases. We discuss preventive measures that, when properly followed, can minimize risks and allow the vast majority of women with epilepsy to give birth to normal children.

Microwave oven injuries in patients with complex partial seizures.

Microwave ovens are often recommended as a safe cooking alternative for persons with epilepsy. We report four patients who suffered serious burns to their hands while handling microwave-heated liquids during a complex partial seizure (CPS). Injuries were due to the contact of the skin with a very hot container. The fact that all patients held on to the hot containers despite being burned and that they did not remember experiencing any pain at the time of the accident indicates that neither high temperatures nor pain will prevent patients who are having a CPS from suffering this type of injury. Unfortunately, there is no foolproof way to prevent the individual from opening the oven and removing its contents during a CPS. The only solution for this problem is "prevention"-individuals with poorly controlled CPS should be cautioned about these risks. The use of microwave settings that permit the heating but not boiling of liquids and the use of gloves while heating food and liquids to scalding temperatures may minimize the risk of this type of injury.

Risk of aspiration pneumonia after an epileptic seizure: a retrospective analysis of 1634 adult patients.

We reviewed the incidence of aspiration pneumonia secondary to seizures in three populations of patients with chronic epilepsy: 733 outpatients seen in an Epilepsy Foundation clinic; 806 adult patients admitted to two university video telemetry units; and 95 institutionalized, profoundly retarded adult patients with chronic epilepsy. Two of the 733 adults who had seizures in the outpatient setting and 2 of the 806 patients who had one or more epileptic seizures in the telemetry units developed aspiration pneumonia. In the 95 institutionalized patients, there were 17 instances of aspiration pneumonia after a generalized seizure and 32 instances of aspiration unrelated to seizures over a 12-month period. Our findings suggest that aspiration pneumonia is not a common complication of seizures in otherwise healthy adults. The increased incidence of aspiration in developmentally delayed individuals seems to derive from a combination of factors. Increased oral secretions, impaired swallowing mechanisms, and difficulty in attaining adequate patient positioning significantly increased the risk of aspiration.

Behaviors mimicking seizures in institutionalized individuals with multiple disabilities and epilepsy: a video-EEG study.

We reviewed 824 video-EEG telemetry requests of institutionalized patients with epilepsy, searching for evaluations of "new seizure types" identified by staff (caregivers, teachers, therapists, LPNs, RNs). Of the 63 newly identified "seizure types," epilepsy was confirmed in 4 (6.3%); 59 represented nonepileptic events. Causes for diagnostic confusion in the profoundly retarded included stereotypic repeated blinking, swallowing, buccolingual movements, spontaneous grimacing, periods of apparent psychomotor arrest and increased muscle tone, dystonic posturing, and irascible personality emerging after reduction of sedatives. Three cases of "startle seizures" were due to dystonic posturing caused by the unexpected contact of body with water during bath. Episodes of decreased daytime alertness ("somnolence") were erroneously attributed to "absence seizures" in eight cases by staff supervising tasks requiring sustained attention (i.e., school, workshop). In less impaired patients, self-stimulation, self-abuse, and ataxia with falls were the more common diagnoses. Simulation of seizures, a somewhat uncommon finding in this population, was the diagnosis in 3 cases. All were high functioning and appeared to simulate seizures to avoid work. Our findings suggest that the de novo appearance of a "new seizure type" in these patients, particularly in cases with a well-established seizure pattern, is uncommon. Four patients in whom the "new event" was confirmed to be epileptic had preexisting secondarily generalized seizures. What the staff identified was the variable clinical progression of seizures probably due to medication changes. Different fragments of the seizure appear to have occurred at different times with variable intensity and duration. A single seizure type may have appeared to be a variety of attacks because of this fragmented presentation.

The Case for Different Severity of Burns in "Contagious" versus "Possession" Seizures.

Serious seizure-related burns are reportedly common in cultures that use ground fire for cooking, heating, or ceremonial purposes. The seriousness of injuries in these cases has been ascribed to the reluctance of bystanders to assist individuals having a seizure either because of fear of contagion (Africa, New Guinea highlands) or because of fear of revenge by the occult (Haiti). We report four Haitian patients who fell into open fires during an epileptic seizure in religious gatherings. Patients were almost immediately rescued from the fire. In contrast to the African and New Guinean patients where upper body involvement was common, burns in these four patients were of moderate severity and involved primarily the lower body. The fear of contagion and belief in magic are interesting notions, but do not explain the different severity and distribution of injuries in these patients. A more likely explanation is that seizures in the African and New Guinean patients occurred while the patient and family were asleep, which probably delayed the rescue, whereas the Haitian patients were helped within moments of falling into the fire in their seizure. The position of the patient at the onset of the seizure is probably what determined the primary areas of thermal injury, and the time to rescue determined their severity and extension.