The role of the supinator muscle in the pathophysiological mechanism of a pulled elbow

2021 ◽  
Author(s):  
Masahiko Kimura
Keyword(s):  
Pathophysiological Mechanism ◽  
Supinator Muscle

scholarly journals COVID-19 Pathogenesis: From Molecular Pathway to Vaccine Administration

Biomedicines ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 903
Author(s):  
Francesco Nappi ◽  
Adelaide Iervolino ◽  
Sanjeet Singh Avtaar Singh
Keyword(s):  
Hospital Setting ◽  
Pathophysiological Mechanism ◽  
Systemic Response ◽  
Respiratory Complications ◽  
Thrombotic Risk ◽  
Global Pandemic ◽  
The Impact ◽  
Multiple Variants ◽  
Roll Out

The Coronavirus 2 (SARS-CoV-2) infection is a global pandemic that has affected millions of people worldwide. The advent of vaccines has permitted some restitution. Aside from the respiratory complications of the infection, there is also a thrombotic risk attributed to both the disease and the vaccine. There are no reliable data for the risk of thromboembolism in SARS-CoV-2 infection in patients managed out of the hospital setting. A literature review was performed to identify the pathophysiological mechanism of thrombosis from the SARS-CoV-2 infection including the role of Angiotensin-Converting Enzyme receptors. The impact of the vaccine and likely mechanisms of thrombosis following vaccination were also clarified. Finally, the utility of the vaccines available against the multiple variants is also highlighted. The systemic response to SARS-CoV-2 infection is still relatively poorly understood, but several risk factors have been identified. The roll-out of the vaccines worldwide has also allowed the lifting of lockdown measures and a reduction in the spread of the disease. The experience of the SARS-CoV-2 infection, however, has highlighted the crucial role of epidemiological research and the need for ongoing studies within this field.

scholarly journals The role of sleep in migraine attacks

1993 ◽  
Vol 51 (4) ◽  
pp. 429-432 ◽  
Author(s):  
Elaine Inamorato ◽  
Suzanmeire N. Minatti-Hannuch ◽  
Eliova Zukerman
Keyword(s):  
Sleep Deprivation ◽  
Migraine Attack ◽  
Sleep Onset ◽  
Pathophysiological Mechanism ◽  
Single Form

Migraine attacks may be precipitated by sleep deprivation or excessive sleep and sleep is also associated with relief of migraine attacks. In view of this variable relationship we studied the records of 159 consecutive outpatients of our Headache Unit. In 121 records there was reference to sleep involvement, in 55% by a single form and in 45% by more than one form. When only one form was related, relief was most common (70%). 30% of that group of patients had the migraine attack precipitated by sleep, 24% by deprivation and 6% by sleep excess. When the effects of sleep were multiple, these effects were as expected logically in 65%: «in accordance» group (e.g attack precipitated by sleep deprivation and relieved by sleep onset. In a second group, («conflicting») where the involvement was not logical, there were three different combinations of sleep involvement, possibly due to more than one pathophysiological mechanism.

scholarly journals Oxidative stress in animals: a pathophysiologist's view

2020 ◽  
Vol 2020 (4) ◽  
pp. 10-18
Author(s):  
Dmitriy Gildikov
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Antioxidant System ◽  
Review Article ◽  
Publication Activity ◽  
Pathophysiological Mechanism ◽  
Oxygen Species ◽  
The World ◽  
Intracellular Oxidative Stress

In the review article, from the modern standpoint, oxidative stress is considered as a universal pathophysiological mechanism of the vast majority of diseases in animals. A brief review of the publication activity in the world on this topic; the significance of reactive oxygen species in the physiology and development of intracellular oxidative stress, the role of etiological factors that initiate their hyperproduction are presented, as well the methods of detecting oxidative stress are characterizited. General concepts of the antioxidant system of the animal body are examined, and the pathophysiological targets of oxidative stress in animals are generalized.

scholarly journals White matter abnormalities of corpus callosum in patients with bipolar disorder and suicidal ideation

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Ran Zhang ◽  
Xiaowei Jiang ◽  
Miao Chang ◽  
Shengnan Wei ◽  
Yanqing Tang ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
White Matter ◽  
Suicidal Ideation ◽  
Corpus Callosum ◽  
Diffusion Tensor ◽  
The Body ◽  
Pathophysiological Mechanism ◽  
The Relationship ◽  
Diffusion Tensor Imaging Dti

Abstract Objective Although many studies have shown that the corpus callosum (CC) may play an important role in bipolar disorder (BD) and suicide, the pathophysiological mechanism of BD underlying suicidal behavior is still unclear. This study aimed to explore the relationship between the CC, and BD and suicidal ideation using diffusion tensor imaging (DTI). Method A total of 203 participants (47 BD patients with suicidal ideation, 59 with BD without suicidal ideation, and 97 healthy controls [HC]) underwent DTI scanning at a single site. We examined the white matter integrity of the CC in the three groups. Results A comparison among groups showed that BD patients with suicidal ideation had significant lower fractional anisotropy (FA) values than those of BD without suicidal ideation and HCs in the body and genu of the CC, and FA values of BD without suicidal ideation were significantly lower than those of HCs. However, in the splenium of corpus callosum, no difference was found between BD without suicidal ideation and HCs. Conclusions Our findings add to the evidence suggesting that the CC plays a key role in BD with suicidal ideation, especially with respect to the role of the genu and body of the CC subserving emotion regulation.

scholarly journals Effects of intensity, attention and medication on auditory-evoked potentials in patients with fibromyalgia

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
N. Samartin-Veiga ◽  
A. J. González-Villar ◽  
Y. Triñanes ◽  
C. Gómez-Perretta ◽  
M. T. Carrillo-de-la-Peña
Keyword(s):  
Auditory Processing ◽  
Auditory Evoked Potentials ◽  
Event Related Potentials ◽  
Pathophysiological Mechanism ◽  
Auditory Event ◽  
Significant Relationships ◽  
Sensory Modalities ◽  
Related Potentials ◽  
Auditory Event Related Potentials

AbstractFibromyalgia (FM) has been associated to an increased processing of somatosensory stimuli, but its generalization to other sensory modalities is under discussion. To clarify this, we studied auditory event-related potentials (AEPs) to stimuli of different intensity in patients with FM and healthy controls (HCs), considering the effects of attention mechanisms and medication. We performed two experiments: In study 1 (n = 50 FM, 60 HCs), the stimuli were presented randomly within the sequence; in study 2 (n = 28 FM, 30 HCs), they were presented in blocks of the same intensity. We analyzed intensity and group effects on N1-P2 amplitude and, only for the FM group, the effect of medication and the correlation between AEPs and clinical variables. Contrary to the expectation, the patients showed a trend of reduced AEPs to the loudest tones (study 1) or no significant differences with the HCs (study 2). Medication with central effects significantly reduced AEPs, while no significant relationships between the N1-P2 amplitude/intensity function and patients’ symptoms were observed. The findings do not provide evidence of augmented auditory processing in FM. Nevertheless, given the observed effect of medication, the role of sensory amplification as an underlying pathophysiological mechanism in fibromyalgia cannot be discarded.

scholarly journals P2X7R-mediated Autophagic Impairment Contributes to Central Sensitization in a chronic Migraine Model with Recurrent Nitroglycerin Stimulation in Mice

2020 ◽  
Author(s):  
Li Jiang ◽  
Yixin Zhang ◽  
Feng Jing ◽  
Ting Long ◽  
Guangcheng Qin ◽  
...  
Keyword(s):  
Chronic Migraine ◽  
Central Sensitization ◽  
Cellular Localization ◽  
Microglial Activation ◽  
Purinergic Receptor ◽  
Radiant Heat ◽  
Underlying Mechanism ◽  
Autophagic Flux ◽  
Pathophysiological Mechanism

Abstract Background: Central sensitization is an important pathophysiological mechanism of chronic migraine (CM). According to our previous studies, microglial activation and subsequent inflammation in the trigeminal nucleus caudalis (TNC) contribute to the central sensitization. The P2X7 receptor (P2X7R) is a purinergic receptor expressed in microglia and participates in central sensitization in chronic pain, but its role in CM is unclear. Numerous studies have shown that P2X7R regulates the level of autophagy and that autophagy affects the microglial activation and inflammation. Recently, autophagy has been shown to be involved in neuropathic pain, but there is no information about autophagy in CM. Therefore, the current study investigated the role of P2X7R in CM and its underlying mechanism, focusing on autophagy regulation.Methods: The CM model was established by repeated intraperitoneal injection of nitroglycerin (NTG) in mice. A Von Frey filament and radiant heat were used to assess the mechanical and thermal hypersensitivity. Western blotting and immunofluorescence assays were performed to detect the expression of P2X7R, autophagy-related proteins, and the cellular localization of P2X7R. To determine the role of P2X7R and autophagy in CM, we detected the effects of the autophagy inducer, rapamycin (RAPA) and P2X7R antagonist, Brilliant Blue G (BBG), on pain behavior and the expression of calcitonin gene-related peptide (CGRP) and c-fos. In addition, the effect of RAPA and BBG on microglial activation and subsequent inflammation were investigated.Results: The expression of P2X7R was increased and was mainly colocalized with microglia in the TNC following recurrent NTG administration. The autophagic flux was blocked in CM, which was characterized by up-regulated LC3-II, and accumulated autophagy substrate protein, p62. RAPA significantly improved the basal rather than acute hyperalgesia. BBG alleviated both basal and acute hyperalgesia. BBG activated the level of autophagic flux. RAPA and BBG inhibited the activation of microglia, limited the inflammatory response, and reduced the expression of CGRP and c-fos. Conclusions: Our results demonstrate the dysfunction of the autophagic process in CM. Activated autophagy may have a preventive effect on migraine chronification. P2X7R contributes to central sensitization through mediating autophagy regulation and might become a potential target for CM.

scholarly journals Neuropsychiatric symptoms and executive function impairments in Alzheimer’s disease and vascular dementia: The role of subcortical circuits

2019 ◽  
Vol 13 (3) ◽  
pp. 293-298 ◽  
Author(s):  
Chan Tiel ◽  
Felipe Kenji Sudo ◽  
Ana Beatriz Calmon
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Executive Function ◽  
Vascular Dementia ◽  
Neuropsychiatric Symptoms ◽  
Vascular Lesions ◽  
Cognitive Test ◽  
Pathophysiological Mechanism ◽  
Clinical Dementia Rating

ABSTRACT Neuropsychiatric symptoms (NPS) in dementia are prevalent, under-recognized and little studied regarding their pathophysiological aspects. The pathophysiological mechanism, as well as the possible role of vascular lesions in the genesis of these symptoms, are still matters of debate. Objective: to describe and compare the prevalence and severity of NPS in subjects with Alzheimer's disease (AD) and vascular dementia (VaD). Methods: a cross-sectional study involving 82 outpatients, divided into two groups (AD × VaD), was conducted. Patients were submitted to the Cambridge Cognitive Test (CAMCOG), the Clock Drawing Test (CLOX 1 and 2), the Neuropsychiatric Inventory (NPI) and the Clinical Dementia Rating (CDR) scale. Neuroimaging was scored using the de Leon and Fazekas scales. Results: 90.8% of the patients had at least one neuropsychiatric symptom. There were statistical differences on the CLOX test and in the apathy symptoms between AD and VaD groups. Apathy and disinhibition proved more prevalent in patients with higher vascular load. Conclusion: apathy and impaired executive function may reflect vascular damage in subcortical circuits in dementia patients.

scholarly journals Increased epithelial permeability syndrome in organic diseases of the upper gastrointestinal tract: systematization of literature data

2021 ◽  
Vol 23 (5) ◽  
pp. 422-427
Author(s):  
Dmitrii N. Andreev ◽  
◽  
Elena V. Ul'iankina ◽  
Keyword(s):  
Gastric Ulcer ◽  
Gastrointestinal Tract ◽  
Gastroesophageal Reflux Disease ◽  
Gastroesophageal Reflux ◽  
Comprehensive Analysis ◽  
Upper Gastrointestinal Tract ◽  
Pathophysiological Mechanism ◽  
Epithelial Permeability ◽  
Upper Gastrointestinal

In 2021, the first Multidisciplinary national consensus was published in Russia. The document provides a comprehensive analysis of pathophysiological, clinical and pharmacotherapeutic aspects of the increased epithelial permeability syndrome (IEPS) as one of the main mechanisms of human diseases. A separate chapter of the consensus devoted to the role of IEPS in organic diseases of the upper gastrointestinal tract demonstrates the importance of this pathophysiological mechanism in the genesis of this group of diseases. This review aims to systematize the literature data on the role of IEPS in organic diseases of the upper gastrointestinal tract, including gastroesophageal reflux disease, chronic gastritis and gastric ulcer.

scholarly journals The role of fibrosis biomarkers in predicting the development of myocardial electrical instability (a literature review)

2021 ◽  
Vol 23 (2) ◽  
pp. 293-303
Author(s):  
V. P. Ivanov ◽  
Yu. Yu. Shushkovska ◽  
I. V. Danylchuk ◽  
V. Р. Shcherbak ◽  
T. Yu. Tsybrii
Keyword(s):  
Growth Factor ◽  
Ventricular Arrhythmias ◽  
Transforming Growth Factor ◽  
Arrhythmogenic Right Ventricular Cardiomyopathy ◽  
Transforming Growth Factor Β1 ◽  
Pathophysiological Mechanism ◽  
Electrical Instability ◽  
Arrhythmogenic Substrate ◽  
Galectin 3

The aim. To analyze scientific researches on studying the biomarkers of fibrosis based on a review of the most recent publications for the possibility to predict electrical myocardial instability development. In total, 101 sources of literature related to the role of fibrosis biomarkers in the past 5 years were analyzed. The review of the literature has shown that myocardial fibrosis іs considered to be an arrhythmogenic substrate for ventricular arrhythmias, as it provides structural and functional disorders of the cardiac electrical activity. Markers of fibrosis, which are measured in cardiac pathology, allow determining the risk of electrical myocardial instability, which is a pathophysiological mechanism underlying sudden arrhythmic death. Conclusions. Markers of fibrosis such as aldosterone, galectin-3 and transforming growth factor-β1, which are measured in heart failure, hypertension, metabolic syndrome, myocardial infarction, atrial fibrillation, hypertrophic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy, have been found to predict myocardial electrical instability. Prediction of myocardial electrical instability in patients with hypertension and coronary heart disease based on studies of the association between frequent ventricular arrhythmias and plasma biomarkers of fibrosis (aldosterone, galectin-3, and transforming growth factor-β1) has not been discussed in the literature.

scholarly journals Acupuncture for Visceral Pain: Neural Substrates and Potential Mechanisms

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Shuping Chen ◽  
Shubin Wang ◽  
Peijing Rong ◽  
Junying Wang ◽  
Lina Qiao ◽  
...  
Keyword(s):  
Ion Channels ◽  
Visceral Pain ◽  
Neural Substrates ◽  
Pathophysiological Mechanism ◽  
Acupuncture Analgesia ◽  
Afferent Pathways ◽  
Future Studies ◽  
Therapeutic Benefits ◽  
Visceral Innervation

Visceral pain is the most common form of pain caused by varied diseases and a major reason for patients to seek medical consultation. Despite much advances, the pathophysiological mechanism is still poorly understood comparing with its somatic counterpart and, as a result, the therapeutic efficacy is usually unsatisfactory. Acupuncture has long been used for the management of numerous disorders in particular pain and visceral pain, characterized by the high therapeutic benefits and low adverse effects. Previous findings suggest that acupuncture depresses pain via activation of a number of neurotransmitters or modulators including opioid peptides, serotonin, norepinephrine, and adenosine centrally and peripherally. It endows us, by advancing the understanding of the role of ion channels and gut microbiota in pain process, with novel perspectives to probe the mechanisms underlying acupuncture analgesia. In this review, after describing the visceral innervation and the relevant afferent pathways, in particular the ion channels in visceral nociception, we propose three principal mechanisms responsible for acupuncture induced benefits on visceral pain. Finally, potential topics are highlighted regarding the future studies in this field.

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