1,720,959 research outputs found
Methodological consideration on the use of the blink reflex R3 component in the assessment of pain in man
No full textEffects of anticholinergic agents on the excitability of the blink reflex in Meige syndrome.
No full textBlink reflex recovery cycle, before and after acute administration of orphenadrine chlorhydrate, was tested in Meige syndrome. Data here reported show, after the drug, a decrease of the unconditioned polysynaptic responses, without a significant modification of the blink reflex recovery curves. This fact rules out a specific effect of anticholinergic drugs on the pathological reduction of the inhibitory process, at an interneuronal level of these polysynaptic pathways, in Meige syndrome
Myotonia levior: contribution to the nosography.
No full textTwo family are described affected by a mild myotonic syndrome, characterized by almost exclusively presence of myotonic phenomenon, in absence of symptoms as muscular weakness, hypotrophy or hypertrophy ("myotonia levior"). The nosographic classification of this disease in the congenital myotonias is today uncertain, and it could be a case of a low expressivity variant of the dominant form (Thomsen disease), or the heterozygotic phenotype of the recessive form (Becker disease). Family history, clinical and electrophysiological data obtained in the patients seem to support first hypothesis, providing an useful element for a correct genetic counselling in these cases
Pain threshold and polysynaptic components of the blink reflex in Parkinson's disease.
No full textThis study was conducted on 15 outpatients with idiopathic Parkinson's disease, 10 on chronic levodopa therapy and 5 drug free, all complaining of painful syndromes. We investigated the perceptive and pain thresholds and the threshold of polysynaptic components of the blink reflex in patients and 8 controls. Our data indicate that as regards the perceptive, pain and R2, R3 thresholds, patients with and without levodopa therapy do not differ significantly from controls
Analysis of electrically evoked, blink reflex nociceptive responses, in migraine and in patients with arterial hypertension
No full textFurther evidence of involvement of central and peripheral sensory pathways in olivopontocerebellar atrophy.
No full textWe report the electrophysiological findings of the central and peripheral somatosensory pathways in 20 patients with olivopontocerebellar atrophy. Changes in sensory action potentials of the median nerve were observed in 14 patients and consisted of reduced sensory potential amplitudes associated in 10 cases with an increase in distal latencies. Sixteen out of 20 patients also showed changes in somatosensory evoked potentials after stimulation of the median nerve, consisting of decreased amplitude of N13 (13 cases) and N20 (16 cases) components, associated with increased N9-N13 interpeak latency in 9 and N13-N20 in 14 patients. The origin of these alterations is discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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