scholarly journals Neurological manifestations and pathophysiological mechanisms of Covid-19

2021 ◽  
Vol 10 (7) ◽  
pp. 1040-1047
Author(s):  
Cristiano Gaujac ◽  
Regiane Cristina Amaral

Background - Severe acute respiratory syndrome coronavirus-2 is a novel, highly infectious coronavirus and the etiologic agent of Covid-19. The course of Covid-19 can range from mild flu-like symptoms to severe, life-threatening symptoms, especially when comorbidities are present. Increasing studies have reinforced the association between SARS-CoV-2 and various neurological manifestations, although the pathophysiological mechanisms remain uncertain. Objective - The aim of this paper was to briefly describe current findings on the relationship between SARS-CoV-2 pathophysiology and major CNS and Peripheral Nervous System (PNS) manifestations. Methods and Material - This work consists of a literature review based on the study of academic papers. To this end, the Pubmed platform was used to search for scientific articles, using the keywords: covid-19, coronavirus, physiopathology, neuronal symptoms. Results - out of 114,660 articles found, 94 were selected for this review. Conclusions - Periodic reviews collaborate in the constant updating and summarization of findings. Understanding the pathophysiology of SARS-CoV-2 on the SN and the link between the systems may lead to earlier and earlier diagnoses of neurological involvement, guide therapeutic management, prevent sequelae, and preserve lives.

2020 ◽  
pp. postgradmedj-2020-137533
Author(s):  
Nandita Prabhat ◽  
Sucharita Ray ◽  
Kamalesh Chakravarty ◽  
Heena Kathuria ◽  
Sukriya Saravana ◽  
...  

BackgroundIn this mini review, we discuss some of the atypical neurological manifestations of dengue virus and attempt to bring them to attention to highlight the neurotropic property of the dengue virus.MethodsCases were chosen from retrospective hospital and outpatient records of all patients seropositive for dengue who attended the neurology referral. Seven patients have been chosen as illustrative examples of dengue-associated neurological involvement. We discuss the various central and peripheral nervous system involvement of patients and discuss the relevant findings in them.ConclusionThrough this case series, we wish to highlight that the dengue virus can affect the nervous system at various targets, using multiple mechanisms of pathogenesis to generate a plethora of presentations. Hence, it is vital to be aware of its presentations to be able to diagnose dengue and treat it accordingly.


2021 ◽  
Vol 14 (5) ◽  
pp. e242330
Author(s):  
Ahmad Saif ◽  
Anton Pick

A range of neurological manifestations associated with COVID-19 have been reported in the literature, but the pathogenesis of these have yet to be fully explained. The majority of cases of peripheral nervous system disease published thus far have shown a symmetrical pattern. In contrast, we describe the case of a patient with asymmetrical predominantly upper-limb sensorimotor polyneuropathy following COVID-19 infection, likely due to a multifactorial pathological process involving critical illness neuropathy, mechanical injury and inflammatory disease. His presentation, management and recovery contribute to the understanding of this complex condition and informs rehabilitation approaches.


Author(s):  
Mohammad Enayet Hussain ◽  
Md Azharul Hoque ◽  
Md Badrul Alam ◽  
Md Abdullah Yusuf ◽  
Rajib Nayan Chowdhury ◽  
...  

Involvement of the nervous system after viral infection is common. Certain viruses show neurotropism. Recent outbreak of severe acute respiratory syndrome CoV 2 (SARSCov- 2) virus has also exhibited neurotropic properties with various neurological manifestations. The pathophysiology of their neurotropism is not yet clearly known. The details of pathophysiology, clinical manifestation and management are expected to be explored in the near future. Here we review the Neurological manifestations of COVID-19 and the early experience in the National Institute of Neurosciences and Hospital. J Bangladesh Coll Phys Surg 2020; 38(0): 122-132


2019 ◽  
Vol 11 (2S) ◽  
pp. 83-88
Author(s):  
O. E. Zinovyeva ◽  
N. V. Vashchenko ◽  
O. E. Mozgovaya ◽  
T. A. Yanakaeva ◽  
A. Yu. Emelyanova

The paper considers various variants of nervous system injury in alcoholic disease. It discusses the epidemiology, pathogenesis, diagnosis, and clinical manifestations of central and peripheral nervous system lesions in the presence of acute and chronic alcohol intoxication. Attention is paid to the issues of etiotropic, pathogenetic, and symptomatic treatment for neurological manifestations of alcoholic disease and to the role of neurotropic B vitamins in the treatment of alcohol-induced deficiency and non-deficiency states.


2020 ◽  
Author(s):  
Juan I. Guerrero ◽  
Luis A. Barragán ◽  
Juan D. Martínez ◽  
Juan P. Montoya ◽  
Alejandra Peña ◽  
...  

Abstract Background: SARS-CoV-2 can affect the human brain and other neurological structures. An increasing number of publications report neurological manifestations in patients with COVID-19. However, no studies have comprehensively reviewed the clinical and paraclinical characteristics of the central and peripheral nervous system's involvement in these patients. This study aimed to describe the features of the central and peripheral nervous system involvement by COVID-19 in terms of pathophysiology, clinical manifestations, neuropathology, neuroimaging, electrophysiology, and cerebrospinal fluid findings.Methods: We conducted a comprehensive systematic review of all the original studies reporting patients with neurological involvement by COVID-19, from December 2019 to June 2020, without language restriction. We excluded studies with animal subjects, studies not related to the nervous system, and opinion articles. Data analysis combined descriptive measures, frequency measures, central tendency measures, and dispersion measures for all studies reporting neurological conditions and abnormal ancillary tests in patients with confirmed COVID-19.Results: A total of 143 observational and descriptive studies reported central and peripheral nervous system involvement by COVID-19 in 10723 patients. Fifty-one studies described pathophysiologic mechanisms of neurological involvement by COVID-19, 119 focused on clinical manifestations, 4 described neuropathology findings, 62 described neuroimaging findings, 28 electrophysiology findings, and 60 studies reported cerebrospinal fluid results. The reviewed studies reflect a significant prevalence of the nervous system's involvement in patients with COVID-19, ranging from 22.5% to 36.4% among different studies, without mortality rates explicitly associated with neurological involvement by SARS-COV-2. We thoroughly describe the clinical and paraclinical characteristics of neurological involvement in these patients. Conclusions: Our evidence synthesis led to a categorical analysis of the central and peripheral involvement by COVID-19 and provided a comprehensive explanation of the reported pathophysiological mechanisms by which SARS-CoV-2 infection may cause neurological impairment. International collaborative efforts and exhaustive neurological registries will enhance the translational knowledge of COVID-19's CNS and PNS involvement and generate strategies for therapeutic decision-making.Registration: This review is registered in PROSPERO (CRD42020193140), July 24, 2020.


Author(s):  
O. V. Demydas

Objective — to analyze clinical neurological manifestations in patients suffering from peptic ulcer disease in the acute phase and in remission, based on the findings of a comprehensive clinical neurological, neuropsychological and paraclinical study. Methods and subjects.  84 patients suffering from PUD were comprehensively examined while in the acute phase of the disease and then all 84 were reexamined while in remission. The age range of the patients was from 25 to 60 years. The average age of the patient was 39.90 ± 1.29 years. The examined individuals were destributed into two groups based on whether they presented symptoms of an acute phase or remission of the peptic ulcer disease. The comprehensive examination included: interview and complaint analysis, neurological examination focused on the state of the autonomic nervous system, study of the neuropsychological differences (the trait and state anxiety levels monitoring based on the Spielberg‑Khanin scale, depressive state evaluation using Beck Depression Inventory, self‑perceived health assessment, mood and activity monitoring using the SAN questionnaire, cognitive impairment evaluation using the MMSE scale, assessment of the refocusing speeds and performance distribution using Schulte tables), as well as lab tests and procedures. Results. Most often, subjects complained of headache (74 (88.0 %) in the acute stage and 37 (44.0 %) in remission). The second most common was a complaint of pain in the thoracic spine (69 (82.1 %) and 35 (41.6 %), respectively). Complaints of dizziness, pain in the heart, palpitations, «interruptions» in the heart, paresthesia were often recorded. In 11 (12.4 %) patients with duodenal ulcer in the acute stage experienced episodes of syncopal state, while in the remission stage they were absent. Complaints that indicated the presence of psychoemotional disorders were anxiety, decreased memory and attention, and sleep disturbances. In patients with duodenal ulcer disease we revealed lesions of the central and peripheral nervous system. Central nervous system disorders were manifested in the form of vestibulo‑cerebellar syndrome (in 30 (35.7 %) patients in the acute stage and in 14 (16.6 %) in the remission stage), extrapyramidal disorders (respectively in 10 (11.9 %) and 4 (4.76 %)) and signs of pyramidal dysfunction (37 (44.0 %) and 15 (17.8 %)). Clinical and neurological examination of the peripheral nervous system in 68 (80.9 %) patients with peptic ulcer in the acute stage and in 31 (36.9 %) in the remission stage revealed polyneuropathy syndrome of varying degrees. Signs of polyneuropathy were accompanied by complaints of disorders of the peripheral nervous system (45 (53.5 %) and 15 (17.8 %) cases, respectively). In 27.4 % of patients with peptic ulcer disease in the acute stage of the complaint were absent at all, and only a thorough neurological examination revealed signs of polyneuropathy. In 56 (66.6 %) patients with peptic ulcer disease in the acute stage and 28 (33.3 %) in the remission stage, the morbidity of paravertebral points in the lower thoracic spine was revealed. Conclusions. Having analyzed the data obtained through the interviews, as well as the neurological characteristics of patients with peptic ulcer disease of the duodenum in the acute phase and in remission it was concluded that most of the somatic complaints and neurological manifestations were common in both the acute phase and the remission of the disease. However, all of the identified neurological differences were significantly more common in the acute phase of the disease.  


Author(s):  
Andrew Graham ◽  
Clare Galton

Rheumatological conditions may be complicated by a variety of both central and peripheral nervous system disorders. Common complications such as entrapment neuropathies are familiar to rheumatologists but accurate diagnosis of less common neurological disorders may be challenging; careful clinical reasoning is essential, supplemented where necessary by imaging, neurophysiology, and other special investigations including cerebrospinal fluid examination. Complications vary according to the nature of the background condition. In rheumatoid arthritis, neurological involvement is typically related to the mechanical consequences of advancing disease; most commonly, entrapment neuropathies such as carpal tunnel syndrome and cervical myelopathy due to atlantoaxial subluxation. By contrast, neurological involvement in systemic lupus erythematosus (SLE) tends to occur earlier in the disease course, with a much wider range of manifestations. The management of stroke or seizures in SLE is not necessarily any different from that in the general population, unless complicated by the antiphospholipid syndrome. However, less common neurological syndromes may demand more specific investigation and treatment. For example, longitudinally extensive transverse myelitis and recurrent optic neuritis (neuromyelitis optica, or Devic’s disease) is frequently associated with antibodies to aquaporin-4, and is highly likely to relapse unless treated vigorously with humoral immunosuppression. Nervous system involvement in vasculitis is common. Finally, not all neurological disorder in rheumatological disease is necessarily due to the underlying condition; neurological complications of disease-modifying therapy are increasingly recognized, in particular central and peripheral nervous system demyelination associated with TNF-α‎‎ inhibitors.


2020 ◽  
Vol 346 ◽  
pp. 108958
Author(s):  
Maohui Feng ◽  
Boqi Xiang ◽  
Li Fan ◽  
Qian Wang ◽  
Weiguo Xu ◽  
...  

1992 ◽  
Vol 50 (2) ◽  
pp. 239-240
Author(s):  
Valentina Van Boekel ◽  
José Maurício Godoy ◽  
Luiz A. Lamy ◽  
Samira Assuf ◽  
João G. Corrêa Meyer Neto ◽  
...  

Peripheral neuropathy is a rare manifestation in hyperthyroidism. We describe the neurological manifestations of a 38 year old female with Graves' disease who developed peripheral neuropathy in the course of her treatment with propylthiouracil. After the drug was tapered off, the neurological signs disappeared. Therefore, we call attention for a possible toxic effect on peripheral nervous system caused by this drug.


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