scholarly journals Neurophysiological Correlates of Central Fatigue in Healthy Subjects and Multiple Sclerosis Patients before and after Treatment with Amantadine

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Emiliano Santarnecchi ◽  
Simone Rossi ◽  
Sabina Bartalini ◽  
Massimo Cincotta ◽  
Fabio Giovannelli ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Healthy Subjects ◽  
Silent Period ◽  
Central Fatigue ◽  
Intracortical Inhibition ◽  
Functional Changes ◽  
Chronic Therapy ◽  
Before And After ◽  
Abductor Digiti Minimi ◽  
Multiple Sclerosis Patients

In ten healthy subjects and in ten patients suffering from Multiple Sclerosis (MS), we investigated the cortical functional changes induced by a standard fatiguing repetitive tapping task. The Cortical Silent Period (CSP), an intracortical, mainlyGABAB-mediated inhibitory phenomenon, was recorded by two different hand muscles, one acting as prime mover of the fatiguing index-thumb tapping task (First Dorsal Interosseous, FDI) and the other one not involved in the task but sharing largely overlapping central, spinal, and peripheral innervation (Abductor Digiti Minimi, ADM). At baseline, the CSP was shorter in patients than in controls. As fatigue developed, CSP changes involved both the “fatigued” FDI and the “unfatigued” ADM muscles, suggesting a cortical spread of central fatigue mechanisms. Chronic therapy with amantadine annulled differences in CSP duration between controls and patients, possibly through restoration of more physiological levels of intracortical inhibition in the motor cortex. These inhibitory changes correlated with the improvement of fatigue scales. The CSP may represent a suitable marker of neurophysiological mechanisms accounting for central fatigue generation either in controls or in MS patients, involving corticospinal neural pools supplying not only the fatigued muscle but also adjacent muscles sharing an overlapping cortical representation.

Corticospinal output during muscular fatigue differs in multiple sclerosis patients compared to healthy controls

2012 ◽  
Vol 18 (10) ◽  
pp. 1500-1506 ◽  
Author(s):  
O Scheidegger ◽  
CP Kamm ◽  
SJ Humpert ◽  
KM Rösler
Keyword(s):  
Multiple Sclerosis ◽  
Healthy Subjects ◽  
Magnetic Stimulation ◽  
Group Differences ◽  
Healthy Controls ◽  
Stimulation Protocol ◽  
Contraction Force ◽  
Abductor Digiti Minimi ◽  
Fatiguing Exercise ◽  
Multiple Sclerosis Patients

Background: In multiple sclerosis (MS), fatigue is a common and often disabling symptom. It has multiple causes with central motor fatigue playing an important role. Objective: The objective of this study was to analyse the central motor conduction changes in relation to muscle contraction force during muscle fatigue and recovery in MS patients compared to healthy controls. Methods: A total of 23 MS patients with fatigue and 13 healthy subjects were assessed during 2 minutes of fatiguing exercise of the abductor digiti minimi muscle of the hand and the subsequent 7 minutes of recovery. Central motor conduction was quantified by transcranial magnetic stimulation using the triple stimulation protocol and calculating a central conduction index (CCI). Results: Force declined to 36% of the pre-exercise level (SD 16%; p < 0.01) in MS patients and to 44% (SD 9%, p < 0.01) in healthy subjects (group differences, not statistically significant). The decline of the CCI was significantly less marked in patients (–20%, SD 26%, p < 0.05) than in healthy subjects (–57%, SD 15%, p < 0.05; group differences, p < 0.05). The decline of force and CCI were not correlated in either group. Conclusions: During a fatiguing exercise, the decline in central motor conduction is significantly less pronounced in MS patients than healthy subjects, although the reduction of force is similar.

Improvement of hand dexterity following motor cortex rTMS in multiple sclerosis patients with cerebellar impairment

2008 ◽  
Vol 14 (7) ◽  
pp. 995-998 ◽  
Author(s):  
G Koch ◽  
S Rossi ◽  
C Prosperetti ◽  
C Codecà ◽  
F Monteleone ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Transcranial Magnetic Stimulation ◽  
Motor Cortex ◽  
Healthy Subjects ◽  
Magnetic Stimulation ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Hand Dexterity ◽  
Time Required ◽  
Multiple Sclerosis Patients ◽  
Cerebellar Symptoms

We tested the effects of 5-Hz repetitive transcranial magnetic stimulation (rTMS) over the motor cortex in multiple sclerosis (MS) subjects with cerebellar symptoms. rTMS improved hand dexterity in cerebellar patients ( n = 8) but not in healthy subjects ( n = 7), as detected by a significant transient reduction of the time required to complete the nine-hole pegboard task. rTMS of the motor cortex may be a useful approach to treat cerebellar impairment in MS patients.

scholarly journals Anal sphincter dysfunction in multiple sclerosis: an observation manometric study

Open Medicine ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. 509-517 ◽  
Author(s):  
Silvia Marola ◽  
Alessia Ferrarese ◽  
Enrico Gibin ◽  
Marco Capobianco ◽  
Antonio Bertolotto ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Fecal Incontinence ◽  
Anal Pressure ◽  
Before And After ◽  
Group A ◽  
The Difference ◽  
Resting Anal Pressure ◽  
Group B ◽  
Multiple Sclerosis Patients ◽  
Group D

AbstractConstipation, obstructed defecation, and fecal incontinence are frequent complaints in multiple sclerosis. The literature on the pathophysiological mechanisms underlying these disorders is scant. Using anorectal manometry, we compared the anorectal function in patients with and without multiple sclerosis.136 patients referred from our Center for Multiple Sclerosis to the Coloproctology Outpatient Clinic, between January 2005 and December 2011, were enrolled. The patients were divided into four groups: multiple sclerosis patients with constipation (group A); multiple sclerosis patients with fecal incontinence (group B); non-multiple sclerosis patients with constipation (group C); non-multiple sclerosis patients with fecal incontinence (group D). Anorectal manometry was performed to measure: resting anal pressure; maximum squeeze pressure; rectoanal inhibitory reflex; filling pressure and urge pressure. The difference between resting anal pressure before and after maximum squeeze maneuvers was defined as the change in resting anal pressure calculated for each patient.ResultsGroup A patients were noted to have greater sphincter hypotonia at rest and during contraction compared with those in group C (p=0.02); the rectal sensitivity threshold was lower in group B than in group D patients (p=0.02). No voluntary postcontraction sphincter relaxation was observed in either group A or group B patients (p=0.891 and p=0.939, respectively).ConclusionsThe decrease in the difference in resting anal pressure before and after maximum squeeze maneuvers suggests post-contraction sphincter spasticity, indicating impaired pelvic floor coordination in multiple sclerosis patients. A knowledge of manometric alterations in such patients may be clinically relevant in the selection of patients for appropriate treatments and for planning targeted rehabilitation therapy.

scholarly journals Polymorphism of chemokine receptor gene CCR5 in multiple sclerosis patients and in healthy subjects in the Siberian region

2006 ◽  
Vol 5 (3) ◽  
pp. 98-104
Author(s):  
Yu. Yu. Orlova ◽  
V. M. Alifirova ◽  
N. V. Cherdyntseva ◽  
P. A. Gervas
Keyword(s):  
Multiple Sclerosis ◽  
Central Nervous System ◽  
Nervous System ◽  
Chemokine Receptor ◽  
Healthy Subjects ◽  
Receptor Gene ◽  
Chronic Inflammatory Disease ◽  
Leading Role ◽  
Multiple Sclerosis Patients ◽  
Chemokine Receptor Gene

Multiple sclerosis is chronic inflammatory disease of the central nervous system in the development of which chemokines of the type Tx1 play the leading role. Chemokines and their receptors participate in the development of multiple sclerosis as a result of drawing immune cells into central nervous system. Mutation of CCR5 delta32 decreases functional activity of the appropriate receptor on cellular surface and thus can reduce migration of leucocytes into foci of injury. Aimed at studying the role of mutation in multiple sclerosis, we compared frequency of gene type CCR5 in peripheral mononuclears of 102 multiple sclerosis patients and in 136 healthy subjects. The results obtained allow to conclude that polymorphism of chemokine receptor gene CCR5del32 is not a leading factor in the susceptibility to multiple sclerosis in the studied population.

scholarly journals Impact of Moderate Individually Tailored Physical Activity in Multiple Sclerosis Patients with Fatigue on Functional, Cognitive, Emotional State, and Postural Stability

2021 ◽  
Vol 11 (9) ◽  
pp. 1214
Author(s):  
Justyna Redlicka ◽  
Ewa Zielińska-Nowak ◽  
Anna Lipert ◽  
Elżbieta Miller
Keyword(s):  
Physical Activity ◽  
Multiple Sclerosis ◽  
Postural Stability ◽  
Emotional State ◽  
Geriatric Depression Scale ◽  
Depression Scale ◽  
Moderate Physical Activity ◽  
Fatigue Syndrome ◽  
Before And After ◽  
Multiple Sclerosis Patients

Multiple sclerosis (MS) is a chronic disease, with fatigue syndrome as one of the main symptoms. The aim of this study was to demonstrate that moderate physical activity (MPA) may have a beneficial effect on postural stability, balance, and clinical parameters. The research group consisted of 137 randomized patients hospitalized at the Department of Neurological Rehabilitation, Medical University of Lodz. Finally, 76 patients were qualified who were divided into two groups—high fatigue (HF) and low fatigue (LF). Participants were assessed twice: before and after a 4-week MPA program using: the Expanded Disability Status Scale (EDSS), the Fatigue Severity Scale (FSS), the Mini-Mental State Examination (MMSE), the Montreal Cognitive Assessment (MoCA), the Beck Depression Inventory (BDI), and the Geriatric Depression Scale (GDS), and stabilometric platform tests were performed. Results obtained after the 4-week MPA program showed a positive effect of the MPA with differences between LF and HF groups. The MPA was more effective in MS patients with LF in cognitive functions, functional status, and postural stability but among HF patients in an emotional state, especially in MS patients below 65 years, although in total, both groups benefited from the MPA.

scholarly journals Satiating Effect of a Ketogenic Diet and Its Impact on Muscle Improvement and Oxidation State in Multiple Sclerosis Patients

Nutrients ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1156 ◽  
Author(s):  
María Benlloch ◽  
María Mar López-Rodríguez ◽  
María Cuerda-Ballester ◽  
Eraci Drehmer ◽  
Sandra Carrera ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Body Composition ◽  
Ketogenic Diet ◽  
Oxidation State ◽  
Lean Mass ◽  
Ketone Bodies ◽  
Paraoxonase 1 ◽  
Before And After ◽  
Multiple Sclerosis Patients ◽  
Beta Hydroxybutyrate

Background: It was previously established that Multiple sclerosis (MS) generates energy alterations at the mitochondrial level related to the loss of muscle mass. Ketone bodies, mainly beta-hydroxybutyrate (BHB), re-establish this energy alteration causing satiety, changes in body composition and a decrease in hormone-dependant hunger, such as ghrelin. The aim of this study was to establish possible improvements in body composition and the level of oxidation in patients with MS, by means of the satiating effect of a ketogenic diet. Methods: A pilot study was carried out with 27 MS patients who were given a Mediterranean isocaloric and ketogenic diet for 4 months. Anthropometric measurements, as well as satiety and hunger perception (VAS scale), were taken. In addition, BHB and paraoxonase 1 (PON1), as an oxidation marker, were measured by spectrophotometric automated assays, and ghrelin was determined by an enzyme immunoassay in the serum. All measurements were taken before and after the intervention. Results: A significant increase in satiety perception at lunch and dinner and of BHB in the blood was obtained. Hunger perception decreased significantly at lunch and dinner with similar levels of ghrelin. In addition, an important increase in lean mass and PON1 was observed. To our knowledge, this is the first study addressing improvements in body composition, oxidation state and metabolism in MS patients, based on the satiating effect of a Mediterranean isocaloric diet. Conclusion: A ketogenic diet increases lean mass and decreases inflammation and oxidation possibly as a consequence of an increase in satiety and decrease in hunger in MS patients.

Effects of natalizumab on oligoclonal bands in the cerebrospinal fluid of multiple sclerosis patients: A longitudinal study

2014 ◽  
Vol 20 (14) ◽  
pp. 1900-1903 ◽  
Author(s):  
R Mancuso ◽  
D Franciotta ◽  
M Rovaris ◽  
D Caputo ◽  
A Sala ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Cerebrospinal Fluid ◽  
Longitudinal Study ◽  
Retrospective Studies ◽  
Oligoclonal Bands ◽  
Igg Index ◽  
Before And After ◽  
Oligoclonal Igg ◽  
Multiple Sclerosis Patients

Retrospective studies show that natalizumab modifies oligoclonal immunoglobulin (IgG) bands (OCBs) in the cerebrospinal fluid (CSF) of multiple sclerosis (MS) patients. In this study, we prospectively analyzed both serum and CSF samples from 24 MS patients, before and after 2 years of natalizumab-based therapy. Our results showed complete (55%) or partial (27%) disappearance of the OCBs in CSF samples that were taken after 2 years of therapy. Intrathecal IgG production, represented by the IgG index and IgGLoc, was also quantitatively reduced. Our data showed that natalizumab substantially modulates both intrathecal polyclonal and oligoclonal IgG production: This effect was much more potent than was previously reported.

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