An experimental study of factors influencing the course of nerve fibers in the embryonic central nervous system

1944 ◽  
Vol 90 (4) ◽  
pp. 267-293 ◽  
Author(s):  
Ruth Rhines ◽  
William F. Windle
Keyword(s):  
Central Nervous System ◽  
Experimental Study ◽  
Nervous System ◽  
Nerve Fibers ◽  
Factors Influencing

Understanding Neuropathic Pain

CNS Spectrums ◽  
2005 ◽  
Vol 10 (4) ◽  
pp. 298-308 ◽  
Author(s):  
Walter Zieglgänsberger ◽  
Achim Berthele ◽  
Thomas R. Tölle
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Neuropathic Pain ◽  
Neuronal Excitability ◽  
Traumatic Injury ◽  
Nerve Fibers ◽  
Cellular Events ◽  
Excitatory Neurotransmitters ◽  
The Central Nervous System ◽  
Activity Dependent

AbstractNeuropathic pain is defined as a chronic pain condition that occurs or persists after a primary lesion or dysfunction of the peripheral or central nervous system. Traumatic injury of peripheral nerves also increases the excitability of nociceptors in and around nerve trunks and involves components released from nerve terminals (neurogenic inflammation) and immunological and vascular components from cells resident within or recruited into the affected area. Action potentials generated in nociceptors and injured nerve fibers release excitatory neurotransmitters at their synaptic terminals such as L-glutamate and substance P and trigger cellular events in the central nervous system that extend over different time frames. Short-term alterations of neuronal excitability, reflected for example in rapid changes of neuronal discharge activity, are sensitive to conventional analgesics, and do not commonly involve alterations in activity-dependent gene expression. Novel compounds and new regimens for drug treatment to influence activity-dependent long-term changes in pain transducing and suppressive systems (pain matrix) are emerging.

Dimephosphone — vasoactive drug for normalization of nervous system function

1993 ◽  
Vol 74 (1) ◽  
pp. 8-12
Author(s):  
R. Kh. Khafizyaiiova ◽  
I. A. Studentsova ◽  
V. I. Danilov ◽  
I. S. Mokrinskaya ◽  
R. A. Garaev ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Experimental Study ◽  
Nervous System ◽  
Cerebral Circulation ◽  
Vasoactive Drug ◽  
System Function ◽  
Nervous System Diseases ◽  
Central Nervous System Diseases ◽  
Clinical Tests ◽  
Nervous System Function

An experimental study of dimephpsphone, using different models of the disorders of cerebrum and cerebral circulation functions, reveals cerebroprotcctive properties and normalizing type of the effect on the regulating mechanisms of cerebral circulation. Clinical tests indicate the efficacy of the drug in different central nervous system diseases in neurological and neurosurgical clinics.

scholarly journals Altered Perception of Distorted Visual Feedback Occurs Soon After Whiplash Injury: An Experimental Study of Central Nervous System Processing

2012 ◽  
Vol 5;15 (5;9) ◽  
pp. 405-413
Author(s):  
Jo Nijs
Keyword(s):  
Central Nervous System ◽  
Experimental Study ◽  
Nervous System ◽  
Medical Care ◽  
Visual Feedback ◽  
Whiplash Injury ◽  
Acute Stage ◽  
Red Cross ◽  
Healthy Controls ◽  
Prospective Longitudinal

Background: Sensory and motor system dysfunctions have been documented in a proportion of patients with acute whiplash associated disorders (WAD). Sensorimotor incongruence may occur and hence, may explain pain and other sensations in the acute stage after the trauma. Objectives: The present study aimed at 1) evaluating whether a visually mediated incongruence between sensory feedback and motor output increases symptoms and triggers additional sensations in patients with acute WAD, 2) investigating whether the pattern of sensations in response to sensorimotor incongruence differs among patients suffering from acute and chronic WAD, and healthy controls. Study Design: Experimental study. Setting: Patients with acute WAD were recruited within one month after whiplash injury via the emergency department of a local Red Cross medical care unit, the Antwerp University Hospital, and through primary care practices. Patients with chronic WAD were recruited through an advertisement on the World Wide Web and from the medical database of a local Red Cross medical care unit. Healthy controls were recruited from among the university college staff, family members, and acquaintances of the researchers. Methods: Thirty patients with acute WAD, 35 patients with chronic WAD, and 31 healthy persons were subjected to a coordination test. They performed congruent and incongruent arm movements while viewing a whiteboard or mirror. Results. Twenty-eight patients with acute WAD reported sensations such as pain, tightness, feeling of peculiarity, and tiredness at some stage of the test protocol. No significant differences in frequencies and intensities of sensations were found between the various test stages (P > .05). Significantly more sensations were reported during the incongruent mirror stage compared to the incongruent control stage (P < .05). The pattern in intensity of sensations across the congruent and incongruent stages was significantly different between the WAD groups and the control group. Limitations: The course and prognostic value of susceptibility to sensorimotor incongruence after an acute whiplash trauma are not yet clear from these results. A prospective longitudinal study with an expanded study population is needed to investigate if those with a lowered threshold to visually mediated sensorimotor incongruence in the acute stage are at risk to develop persistent pain and disability. Conclusion: Patients with acute WAD present an exacerbation of symptoms and additional sensations in response to visually mediated changes during action. These results indicate an altered perception of distorted visual feedback and suggest altered central sensorimotor nervous system processing in patients with acute WAD. Key words: Sensorimotor incongruence, visually mediated changes, whiplash, sensations, acute pain, chronic pain, altered central sensorimotor processing, central nervous system.

scholarly journals Schwannoma of the arythenoid

2013 ◽  
Vol 11 (2) ◽  
pp. 224-226 ◽  
Author(s):  
Carlos Eduardo Molinari Nardi ◽  
Alexandre Wakil Burzichelli ◽  
Elio Gilberto Pfuetzenreiter ◽  
Rogerio Aparecido Dedivitis
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Schwann Cells ◽  
Rare Case ◽  
Nerve Fibers ◽  
Endoscopic Procedure ◽  
The Central Nervous System

Schwannoma is a benign encapsulated tumor that originates from the Schwann cells lining nerve fibers outside the central nervous system. We report a rare case of schwannoma that arose from the left arythenoid cartilage The patient underwent excision of the mass through microlaryngeal endoscopic procedure. No recurrence was observed during follow-up.

scholarly journals Experimental study of various central nervous system effects of eugenol in mice and rats

2012 ◽  
Vol 10 (3) ◽  
pp. 208-214 ◽  
Author(s):  
M Sharma ◽  
GP Rauniar ◽  
BP Das
Keyword(s):  
Central Nervous System ◽  
Experimental Study ◽  
Nervous System ◽  
Animal Models ◽  
Antinociceptive Effect ◽  
Test Group ◽  
Control Group ◽  
Anticonvulsant Effect ◽  
Research Activities ◽  
Group I

Background: Eugenol is an essential component of many medicinal herbs. It is a member of the allylbenzene class of chemical compounds. Since years, it is being used in dental practice to relieve pain arising from pulpitis and dentinal hypersensitivity. There are few reports of anticonvulsant effect but further effects are less reported. Lack of comprehensive studies and data of eugenol on the central nervous system effects in animal models thus necessitates further research activities. Objective: To observe and evaluate various neuropharmacological effects like antinociceptive effect, anticonvulsant effect, effect on motor co-ordination, pentobarbital induced sleeping time and anxiolytic effect of eugenol in mice and rats. Methods: It was a quantitative experimental study done in the laboratory setting of the department of Clinical Pharmacology and Therapeutics. For each test, respective animal models were used. Animals were divided into three groups of six each, group I as control, group II as standard control and group III as test group. Results: Significant effects were observed in analgesic, anticonvulsant and sedative model whereas no significant effect as compared to control was observed in test of motor co-ordination and in behavioral models. Conclusion: This study shows eugenol to possess analgesic, anticonvulsant and sedative effect whereas it didn.t have any effect on models of anxiety. Various target sites have been implicated but this study doesn.t conclude a plausible mechanism behind all these observed effects. DOI: http://dx.doi.org/10.3126/hren.v10i3.7137 Health Renaissance; September-December 2012; Vol 10 (No.3);208-214

Sign in / Sign up

Export Citation Format

Share Document