A New Waveform Analysis Method Reflecting the Diversity of F-wave Waveforms–Waveform types in healthy subjects based on the combined use of the additive averaging method and histograms–

2022 ◽  
pp. 109474
Author(s):  
Marina Todo ◽  
Toshiaki Suzuki ◽  
Masaaki Hanaoka ◽  
Hitoshi Asai
Keyword(s):  
Healthy Subjects ◽  
Averaging Method ◽  
Waveform Analysis ◽  
Analysis Method ◽  
Combined Use ◽  
F Wave

scholarly journals Evidence of Increased Motoneuron Excitability in Stroke Patients Without Clinical Spasticity

2008 ◽  
Vol 23 (1) ◽  
pp. 14-16 ◽  
Author(s):  
Jakob Udby Blicher ◽  
Jørgen Feldbæk Nielsen
Keyword(s):  
Healthy Subjects ◽  
Spinal Motoneuron ◽  
Wave Frequency ◽  
Stroke Patients ◽  
Abductor Pollicis Brevis ◽  
Motoneuron Excitability ◽  
Modified Ashworth Scale ◽  
F Wave ◽  
Ashworth Scale ◽  
Stimulation Of

Introduction. The contribution of hyperreflexia to impairment after stroke is debated. Spinal motoneuron excitability in healthy subjects and stroke patients with and without spasticity was compared. Methods. Twenty-four patients with single stroke more than 6 months ago and 18 gender-matched healthy volunteers were included. Spasticity was assessed according to the Modified Ashworth Scale. Mmax amplitude and F wave frequency in the abductor pollicis brevis muscle were measured by electrical stimulation of the median nerve. Results . Mmax values were comparable between the groups. However, patients with (n = 7) and without (n = 17) clinically evident spasticity had a significant increase in F wave frequency when compared with healthy subjects. F wave frequency did not differ between spastic and nonspastic patients. Discussion. Increase in spinal motoneuron excitability after stroke is present in stroke patients with minor or no motor deficiencies and does not necessarily lead to spasticity.

Assessment of Urine-Concentrating Ability in Man: Effect of Fludrocortisone and Urea in Enhancing Response to Vasopressin

1975 ◽  
Vol 48 (4) ◽  
pp. 269-278
Author(s):  
C. de F. W. Goonaratna ◽  
O. M. Wrong
Keyword(s):  
Sodium Chloride ◽  
Renal Disease ◽  
Clinical Assessment ◽  
Healthy Subjects ◽  
Renal Medulla ◽  
Urine Concentration ◽  
Loop Of Henle ◽  
Combined Use ◽  
Long Acting ◽  
Urine Concentrating Ability

1. Healthy subjects, given a long-acting preparation of vasopressin intramuscularly, excreted a significantly less concentrated urine than when subjected to fluid deprivation for 28 h. 2. When fludrocortisone, a potent mineralocorticoid, was given in addition to vasopressin the urine was not significantly less concentrated than after fluid deprivation. 3. Oral urea-loading also enhanced the urine-concentrating power of vasopressin but its effect was less marked than that of fludrocortisone. Oral urea did not increase further the urine concentration achieved by combined fludrocortisone and vasopressin. 4. Renal concentrating power was assessed in fourteen patients with renal disease and impaired concentrating ability. Fludrocortisone significantly enhanced the urine concentration achieved by vasopressin alone and the resultant urine was not significantly less concentrated than that achieved by fluid deprivation. 5. The action of fludrocortisone in enhancing the urine-concentrating effect of vasopressin is similar to that of aldosterone and is probably due to the increased sequestration of solute in the renal medulla, caused by increased reabsorption of sodium chloride in the ascending limb of the loop of Henle. 6. In the clinical assessment of renal concentrating power, the combined use of fludrocortisone and vasopressin has potential advantages over established methods.

Median Nerve F-Wave Conduction in Healthy Subjects

1984 ◽  
Vol 64 (11) ◽  
pp. 1679-1683 ◽  
Author(s):  
Mark W. Cornwall ◽  
Charlene Nelson
Keyword(s):  
Median Nerve ◽  
Healthy Subjects ◽  
F Wave

scholarly journals Edad, escolarización y tareas de Fluencia Verbal para el screening de pacientes con Enfermedad de Alzheimer

2015 ◽  
Vol 31 (3) ◽  
pp. 773 ◽  
Author(s):  
Adriana Goñi-Sarriés ◽  
José J. López-Goñi ◽  
David Granados-Rodríguez ◽  
Angela González-Jiménez
Keyword(s):  
Clinical Practice ◽  
Healthy Subjects ◽  
Demographic Variables ◽  
Screening Tests ◽  
Discriminatory Ability ◽  
Parallel Task ◽  
Combined Use ◽  
Phonemic Fluency ◽  
Time Variables ◽  
The One

<p>Introduction. The Verbal (VF), Semantic (SF) and Phonemic Fluency (PF) tests are commonly used in clinical practice. Having different alternative tests, that could also allow for the effect of demographic variables, would improve their use as screening tests, making it possible to differentiate patients with or without Alzheimer´s disease (AD). Aims. (1) to compare the discriminatory ability of the SF tasks “things in a house” and “food” versus the task “animals” among patients with the AD (n=50) and healthy subjects (n=50). (2) to compare the use of the phonemes such as “P”, “M” and “R” as an alternative and/or parallel task to the phonemes “F”, “A” and “S”. (3) to asses the combined use of both tasks with the demographic variables for the screening of AD patients and the healthy ones. Results. Both semantic and phonemic categories indicate similar results, high correlation, support the criteria validity and allow for their use in a parallel way. Among all the different roles assessed, the most successful in screening correctly 91% of the evaluated subjects is the one that includes tasks such as “things in a house”, the phonemes “A” and “S” and the age and schooling time variables. Conclusion. The parallel use of VF and PF, plus the demographic variables improve the discriminatory ability of the VF tests.</p>

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