Possibilities and limitations of the H-reflex test in the diagnosis of diseases of the nervous system

1985 ◽  
Vol 15 (2) ◽  
pp. 167-172 ◽  
Author(s):  
V. P. Novikova
Keyword(s):  
Nervous System ◽  
H Reflex ◽  
Diagnosis Of Diseases

scholarly journals Pioneers in the cisterna magna puncture

2020 ◽  
Vol 78 (3) ◽  
pp. 176-178
Author(s):  
Thiago Ferreira Simões DE SOUZA
Keyword(s):  
Central Nervous System ◽  
Cerebrospinal Fluid ◽  
Nervous System ◽  
Clinical Applications ◽  
Alternative Route ◽  
Cisterna Magna ◽  
Relative Safety ◽  
The Central Nervous System ◽  
Promising Source ◽  
Diagnosis Of Diseases

Abstract At the beginning of the 20th century, cerebrospinal fluid (CSF) collection and analysis emerged as a promising aid in the diagnosis of diseases of the central nervous system. It was obtained through the established procedure of lumbar puncture, described by Heinrich Quinke in 1891. The search for an alternative way to gather the CSF emerged in animal research, highlighting the cisterna magna as a promising source, with relative safety when performed by someone trained. Described initially and in detail by James Ayer in 1920, the procedure was widely adopted by neurologists and psychiatrists at the time, featuring its multiple advantages and clinical applications. After a period of great procedure use and exponential data collection, its complications and risks relegated the puncture of the cisterna magna as an alternative route that causes fear and fascination in modern Neurology.

Anticipatory postural mechanisms: Some evidence and methodological implications

1996 ◽  
Vol 19 (1) ◽  
pp. 77-78
Author(s):  
Tatsuya Kasai
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Motor Control ◽  
Postural Control ◽  
H Reflex ◽  
Human Motor Control ◽  
Therapeutic Implications ◽  
Anticipatory Postural Control ◽  
The Central Nervous System ◽  
Human Motor

AbstractTo understand the basic priorities of the central nervous system in human motor control, neurophysiological parameters are important. Certain H-reflex methods related to anticipatory postural control are particularly useful and may have therapeutic implications.

scholarly journals Effects of muscle action type on corticospinal excitability and triceps surae muscle-tendon mechanics

2018 ◽  
Vol 119 (2) ◽  
pp. 563-572 ◽  
Author(s):  
P. Valadão ◽  
S. Kurokawa ◽  
T. Finni ◽  
J. Avela
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Motor Control ◽  
Pennation Angle ◽  
H Reflex ◽  
Corticospinal Excitability ◽  
Triceps Surae ◽  
Fascicle Length ◽  
The Central Nervous System ◽  
Muscle Actions

This study investigated whether the specific motor control strategy reported for eccentric muscle actions is dependent on muscle mechanical behavior. Motor evoked potentials, Hoffman reflex (H-reflex), fascicle length, pennation angle, and fascicle velocity of soleus muscle were compared between isometric and two eccentric conditions. Ten volunteers performed maximal plantarflexion trials in isometric, slow eccentric (25°/s), and fast eccentric (100°/s) conditions, each in a different randomized testing session. H-reflex normalized by the preceding M wave (H/M) was depressed in both eccentric conditions compared with isometric ( P < 0.001), while no differences in fascicle length and pennation angle were found among conditions. Furthermore, although the fast eccentric condition had greater fascicle velocity than slow eccentric ( P = 0.001), there were no differences in H/M. There were no differences in motor evoked potential size between conditions, and silent period was shorter for both eccentric conditions compared with isometric ( P = 0.009). Taken together, the present results corroborate the hypothesis that the central nervous system has an unique activation strategy during eccentric muscle actions and suggest that sensory feedback does not play an important role in modulating these muscle actions. NEW & NOTEWORTHY The present study provides new insight into the motor control of eccentric muscle actions. It was demonstrated that task-dependent corticospinal excitability modulation does not seem to depend on sensory information processing. These findings support the hypothesis that the central nervous system has a unique activation strategy during eccentric muscle actions.

Genome sequencing in patients with likely hereditary diseases of the nervous system

2020 ◽  
pp. 55-56
Author(s):  
И.В. Канивец ◽  
К.В. Горгишели ◽  
В.Ю. Удалова ◽  
А.А. Шарков ◽  
Д.В. Пьянков ◽  
...  
Keyword(s):  
Nervous System ◽  
Genome Sequencing ◽  
Heterogeneous Group ◽  
Gene Panel ◽  
Hereditary Diseases ◽  
Genetic Causes ◽  
Diagnosis Of Diseases

Технологии секвенирования нового поколения (NGS) имеют важное значение в диагностике заболеваний нервной системы. Преимуществом их использования является широкий охват исследуемых генов, что позволяет повысить выявляемость причин в такой клинически и генетически гетерогенной группе заболеваний. Цель настоящей работы - определить эффективность секвенирования генома для выявления генетических причин у пациентов с вероятно наследственными заболеваниями нервной системы. В нашем исследовании секвенирование генома позволило выявить причину заболевания у 28,6% таких пациентов. При отрицательном результате анализа панели генов секвенирование генома позволило выявить причину заболевания у 9% пациентов. NGS-based technologies play an important role in the diagnosis of diseases of the nervous system. The advantage of their using is the wide coverage of the analyzed genes, which allows to increase the detection of causes in such a clinically and genetically heterogeneous group of diseases. The purpose of this work is to determine the effectiveness of genome sequencing to identify genetic causes in patients with likely hereditary diseases of the nervous system. In our study, genome sequencing revealed the cause of the disease in 28.6%. In cases with a negative result from the analysis of the gene panel, genome sequencing revealed the cause of the disease in 9% of patients.

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