Ideggyogyaszati Szemle-Clinical Neuroscience最新文献

Migraine is a disabling primary headache disorder that directly affects a significant proportion of the population. Despite its widespread prevalence, migraine remains under-diagnosed and under-treated. To support clinical decision-making, we convened a panel of experts to develop a clinical approach to the diagnosis and management of migraine. This consensus paper was established by experts and supported by a review of current literature, and it was also endorsed by the Hungarian Pain Society and the Hungarian Headache Society. We introduce typical clinical features, diagnostic criteria, subtypes, pitfalls and differential diagnoses of migraine. We outline best practices for acute and preventive treatment of migraine in various patient populations, including adults, women with childbearing potential (menstruation migraine, pregnancy etc) and the potential cardiovascular risk of migraineurs. 

Background and purpose: Post-COVID condition (also known as long COVID) is a syndrome characterized by persistent symptoms following a suspected or confirmed SARS-CoV-2 infection, lasting for at least two months and are not attributable to other conditions. The most common symptoms include fatigue, diffuse pain, post-exertional malaise and “brain fog” (impairment of memory and concentration). The pathomechanism of long COVID is the subject of ongoing, intensive research. Our purpose was to review the literature on the pathomechanism of long COVID.

Methods: We reviewed original and review articles in Hungarian and English on the pathomechanism of long COVID, published between January 2019 and June 2024, in the PubMed and Google Scholar databases.

Results: Potential underlying causes of the symptoms are outlined in three main theories. 1) The concept of “long COVID as a distinct neurological disease” suggests that direct viral neuroinvasion, apoptosis, and demyelination processes are responsible for the symptoms. 2) The theory of “long COVID as a systemic disease with neurological symptoms” is based on the virus induced, prolonged cytokine and chemokine release, as well as the reactivation of latent viral infections. 3) According to the concept of “long COVID as a somatoform disorder”, the disease results from abnormal activation of the proinflammatory cytokine network leading to central nervous system sensitization, a well-known psychoneuroimmunological mechanism. Our study highlighted significant overlaps between long COVID and conditions such as chronic fatigue syndrome/myalgic encephalomyelitis, a group of symptoms not defined as a distinct mental disorder in DSM-5, but commonly referred to as Gulf War syndrome, chronic Lyme disease and somatic symptom disorder.

Conclusion: The pathomechanism of long COVID, which presents with a wide range of nonspecific symptoms, remains unknown, and no reproducible disease-specific biomarker has been identified to date. Clarifying the etiology of the disease is crucial for determining adequate and effective therapeutic methods.

Background and purpose: Recognising neurological diseases is challenging without accurate diagnostic tools. Therefore, many approaches have been taken to recognise and evaluate these diseases through speech, movement, or drawing modalities.The purpose of the study is to compare the recognition of Parkinson’s and cerebellar symptoms using spiral and line drawings recorded from the same subjects. We also investigate the importance of pin pressure in classification. Furthermore, an attempt is made to use the two types of drawings together for more accurate classification.

Methods: Images were generated from the raw data with and without pressure data. We then performed classification with the help of pre-trained and own deep learning feature extraction models. Mann-Whitney U test is used to test the significance of the results with a 0.05 significance level.

Results: The results showed that spiral drawings significantly performed better than lines (p-value: 0.001). Furthermore, combining the two types of drawings improves recognition when pressure is available (p-value: 0.017). However, no performance degradation can be expected without pressure data using one drawing task (p-value: 0.507).

Conclusion: The spiral is recommended as the primary drawing, but combining multiple drawings can contribute to a more confident recognition. By excluding pressure, no significant decrease is expected in the model’s performance.

Background and purpose: Aging, inactivity, malnutrition and diseases cause sarcopenia and stroke is an important reason of sarcopenia. The aim of this study was to determine the sarcopenia and to evaluate the relationship between functional outcome and temporal muscle thickness using brain CT in older acute stroke patients. 

Methods: A retrospective study was conducted with acute stroke patients in a single neurology clinic. A total of 114 patients aged 65 years and older were included. Temporal muscle thickness was measured manually using brain computed tomography on admission and third month. Sarcopenia risk and modified Rankin scale scores at 3 months after stroke were assessed. 

Results: The mean temporal muscle thickness was 5.85±0.96 on admission and 5.67±0.97 on third month in the entire group (p=0.004). Patients with sarcopenia risk score ≥4 on third month, the mean temporal muscle thickness was 5.63±1.02 and 5.32±0.98 on admission and 3rd month respectively (p<0.001). There was a significant correlation between baseline temporal muscle thickness and age (r=-0.728, p<0.001) and body mass index (r= 0.360 , p=0.017). 23 patients (20.1%) had poor functional outcome at 3 months after stroke (mRS>3). A significant correlation was found between temporal muscle thickness on admission and the third month modified Rankin scale score (r=-0.613, p<0.001). 

Conclusion: Measurement of temporal muscle thickness using brain CT in stroke patients may be a useful method for muscle mass determination and treatment of sarcopenia. 

Corticobasal degeneration (CBD) is one of the primary tauopathies with a disease onset in the 5th to 7th decade. CBD is a progressive condition of unknown aetiology, which is characterised neuropathologically by neuronal loss, astrogliosis and deposition of filamentous tau inclusions, composed entirely of 4-repeat tau isoforms, in neurons and glial cells in cerebral cortical areas, basal ganglia, brainstem and cerebellar nuclei. The term CBD is now a neuropathological diagnostic one and for the canonical clinical syndrome associated with CBD neuropathological changes, the corticobasal syndrome (CBS) term is used. In addition to CBS, the clinical spectrum also includes a behavioural variant of frontotemporal dementia syndrome, speech disorders, Richardson’s syndrome and, rarely, posterior cortical syndrome. In addition to CBD, CBS can also be caused by other pathologies. A number of genetic risk factors of CBD have been identified. As specific biomarkers confirming CBD as the underlying pathology responsible for CBS or other clinical manifestations are still lacking, for a definitive diagnosis of CBD neuropathological investigation is required. Recent cryo-electron microscopic studies have proven that CBD is a distinct tauopathy associated with a unique molecular structure of the tau filaments, which firmly differentiates it from other primary tauopathies. 

Background and purpose: When examining coping with chronic pain, it is important to consider not only the physical characteristics of pain but also its psychological and social aspects, such as depression or pain catastrophizing. The relationship between pain and the psychological characteristics of patients has been studied in various approaches in previous research. The aim of this study was to separate groups within a clinical sample using a profiling method and to identify risk factors related to illness behaviour.

Methods: The study involved 136 patients aged 18 and above diagnosed with chronic pain of various etiologies. Data collection involved the use of psychological questionnaires measuring levels of health literacy, social support, depressive symptoms, and pain catastrophizing, in addition to pain characteristics. Statistical analysis of the data was conducted using independent samples t-tests, one-way ANOVA, and K-means cluster analysis.

Results: Three clusters significantly different from each other in terms of all grouping variables (p < 0.001 in each case) were identified within the studied sample. These clusters were named “Conscious Worriers” (1st), “Balanced Symptom Perceivers” (2nd), and “Abandoned Catastrophizers” (3rd). We successfully identified the 2nd cluster as a protected group and the 3rd cluster as a risk group.

Conclusion: Identified clusters can facilitate the application of group-specific pain therapies by describing the characteristic combinations of risk factors. Our results support the importance of pain education and prevention.

Background and purpose:

Parkinson’s disease (PD) is the most common movement disorder and the second most common neu­rodegenerative disease of the central ner­vous system. Dizziness is frequently reported by PD patients, yet there is a paucity of research focusing on the vestibulo-ocular reflex (VOR) in this population using high-frequency vestibular testing. This study aims to investigate the VOR in individuals with PD using the video head thrust test with and without suppression. 

Methods:

Forty individuals with PD and 40 healthy individuals were included in the study. According to the Hoehn-Yahr Scale, individuals with PD were defined as early stage with a score of 1–2.5 and middle to late stage with a score of 3 to 5. The Head Impulse Testing Paradigm (HIMP) and Suppression Head Impulse Testing Paradigm (SHIMP) were applied to all individuals.

Results:

No statistically significant difference was observed between the PD group and the control group in terms of semicircular canal (SCC) gains in both HIMP and SHIMP tests. No catch-up saccades were observed in the right anterior, right posterior, left anterior, and left posterior SCC planes in the PD and control groups. However, in the right lateral SCC plane 32 patients in the PD group had saccades, while 8 patients in the control group had saccades. In the left lateral SCC plane, 32 patients in the PD group and 9 patients in the control group had catch-up saccades. A statistically significant difference was observed in the number and amplitude of saccades in the right and left lateral SCC planes compared to the control group (p<0.05). In addition, in the PD group, the amplitude, peak velocity, and latency of the anticompensatory saccades seen in SHIMP showed a statistically significant difference compared to the control group (p<0.05).

Conclusion:

VOR in the vertical SCC plane was not affected in individuals with PD. However, VOR in the lateral SCC plane was affected. It was concluded that when evaluating VOR with both HIMP and SHIMP in individuals with PD, the presence of catch-up saccades should be focused on and evaluated for possible vestibular dysfunction, even though SCC gains are normal. This study will contribute to a deeper understanding of vestibular function in PD, potentially informing better management strategies for dizziness in this population. 

Background and purpose:

Quadriceps femoris muscle spasticity is commonly measured by the Wartenberg pendulum test. It is generally assumed that lower values of the number of swings of the leg and lower relaxation indexes are associated with higher muscle tone and more spasticity. Still, there is incoherence regarding the test’s applications with various body positions and starting mechanisms. This study aims to investigate the influence of body position, leg dominance, and automatic leg-releasing mechanism on muscle tone measured by pendulum test in healthy population whose muscle tone is often compared to the spastic muscle tone of patients with neurologic disorders. 

Methods:

15 healthy adults (age: 19-32 years, 9 males, 6 females) participated in this study. A Zebris 3D ultrasound-based motion analysis system was used to record kinematic data during the pendulum test. The number of swings of the leg and the relaxation index were computed from the collected data. The pendulum test was completed in eight conditions: in supine and semi-supine positions on the dominant and non-dominant leg separately and with investigator-release and automata-release mechanisms. Paired t-tests and Wilcoxon test with the significance level of .05 were applied in comparison of pairs of the pendulum test condition.

Results:

1) Applying automata-release mode, in the non-dominant leg the number of swings (p=0.03) and the relaxation index (p<0.001) were significantly higher in semi-supine than in supine position. 2) The non-dominant leg had significantly more swings than the dominant leg in both body positions with automata-release mode (p=0.009, p<0.001). In investigator-release mode this occurred in supine position (p<0.001). 3). Regarding the number of swings in investigator-release versus automata-release mode, no significant differences were found in any test condition, but the relaxation index showed significant difference for the non-dominant leg (p=0.01, p=0.009). 4) The values of the relaxation index didn’t support in all test conditions the results what the number of swings provided about the muscle tone. In automata-release mode, the dominant leg has a lower number of swings and a higher relaxation index than the non-dominant leg.

Conclusion:

The effect of body position on the quadriceps muscle tone can be assessed by applying the pendulum test with an automatic leg-releasing mechanism even when the application of conventional investigator-release mode does not show a significant effect. The pendulum test is more sensitive to assess spasticity with automatic-release than with investigator-release mode. 

Background and purpose:

This prospective study aimed to investigate diffe-rences in video head impulse test (vHIT) and cervical vestibular evoked myogenic poten-tial (cVEMP) findings between patients with vertebrobasilar insufficiency (VBI) and Meniere’s disease (MD) who experience episodic vertigo attacks.

Methods:

A total of 27 patients with VBI and 37 patients with MD were enrolled into the study in a tertiary referral center. Inclusion criteria consisted of patients with a minimum of two previous vertigo attacks, unaccompanied by any neurological symptoms during an attack. All patients underwent horizontal canal h-vHIT and c-VEMP assessments following pure sound audiometric examinations. First, vHIT and cVEMP results for low and high flow sides in VBI patients were analyzed. Subsequently, data from the low-flow side in VBI patients and the affected side in MD patients were compared.

Results:

The mean vHIT values for low and high-flow volume sides in VBI patients were 0.68 and 0.88, respectively. In MD patients, mean vHIT values for affected and healthy sides were measured as 0.77 and 0.87, respectively. Abnormal results were observed in 66.7% of VBI patients and 51.4% of MD patients, with no statistically significant difference between the findings (p> 0.05). Upon examining the affected side, c-VEMP responses were absent in 41% of MD patients and 48% of VBI patients, with no statistically significant difference between the groups (p> 0.05).

Conclusion:

vHIT and cVEMP assessments can be utilized as supplementary tools to radiologic investigations for the clinical diagnosis and follow-up of VBI. However, no significant differences were observed between vHIT and cVEMP findings in patients with MD and VBI.

Background and purpose:

Dysphagia, characterized by difficulty in swallowing due to neurological deficits, stands out as the foremost contributor to stroke asso­ciated pneumonia (SAP) development. Recent investigations have explored the utility of blood tests, including parameters like neutrophil count, leukocyte count, neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and the CRP to albumin ratio (CAR), at the time of admission as potential markers for predicting SAP development. This study is set out to assess predictors of SAP in patients with acute ischemic stroke and dysphagia. 

Methods:

This retrospective cross-sectio­nal study, conducted at the University of Health Sciences, Neurology Department of Erenkoy Mental Health Neurological Disor­ders in Istanbul, Turkey, between January 2021 and January 2023, assessed 65 indivi­duals with acute ischemic stroke and dysphagia. Excluding specific criteria, clinical and laboratory data were collected. Patients were categorized into SAP and non-SAP groups based on diagnostic criteria. Results provide insights into risk factors of SAP.

Results:

In this study of 65 stroke patients with dysphagia, 27 (41.5%) developed SAP within the first week. No significant differences in age, gender, comorbidities, or infarct size were observed between the pneumonia-positive and pneumonia-negative groups (p > 0.05). HbA1c levels were significantly lower in the pneumonia-positive group (p = 0.02). Logistic regression revealed that NLR, CAR levels, and the presence of atrial fibrillation (AF) were significant predictors of pneumonia development (p < 0.001).

Conclusion:

Dysphagia is considered one of the most significant risk factors for SAP. However not all ischemic stroke patients with dysphagia develop SAP; that is the reason we think NLR, CAR, and AF might be predictors of SAP in acute ischemic stroke patients with dysphagia.