1,721,112 research outputs found
Morphometric and neurophysiological analysis of skeletal muscle in paraplegic patients with traumatic cord lesion.
No full textParaplegia. 1991 May;29(4):247-52.
Morphometric and neurophysiological analysis of skeletal muscle in paraplegic patients with traumatic cord lesion.
Lotta S, Scelsi R, Alfonsi E, Saitta A, Nicolotti D, Epifani P, Carraro U.
Source
Centro di Recupero G. Verdi, USL.3., Pavia, Italy.
Abstract
Morphometric and electrophoretic properties of soleus and medialis gastrocnemius fibres from paraplegic patients were studied 1 to 10 months following complete traumatic cord transection (spinal cord level C5-T1). In the short term of paraplegia (1-6 months) gastrocnemius medialis and soleus muscles showed predominant atrophy of IIA fibre types. In long term paraplegia (8-10 months) atrophy and reduction of type 1 fibres, with presence of high percentages of type IIB fibres, were seen in both studied muscles. The consistence in both muscles of IIB intermediate fibres in long term paraplegia, seems to indicate the initial stage of a mechanism of fibre transformation reflecting the adaptative capacity of the paretic muscle to spasticity. Electrophysiological studies of the H-reflex and the H/M ratio values reveal an increase of the H-reflex excitability in the soleus and gastrocnemius muscles during a 1 to 10 months follow-up.
PMID:
1831255
[PubMed - indexed for MEDLINE
Effects of Neuromodulation on Gait
No full textIn the last decades, non-invasive brain stimulation (NIBS) has evolved to become a valuable tool in both basic and clinical neuroscience. Various methods of transcranial magnetic stimulation (TMS) and transcranial electrical stimulation (TES) have been widely used for diagnostic, prognostic and even therapeutic applications in a broad range of neurological and psychiatric disorders. The rationale for using NIBS techniques lies in the possibility to modulate, in a targeted manner, the activity of different cerebral and cerebellar cortical regions, as well as the functional connections between these areas and distant brain regions also including subcortical structures. The neural circuitry involved in the different aspects of gait control is very complex and includes, along with the basal ganglia-cortical loops, the cerebellum and structures of the brainstem and the spinal cord. This is why different approaches of NIBS have been suggested for treatment of gait disorders in a variety of neurological disorders including Parkinson’s disease, stroke, cerebellar ataxia, multiple sclerosis, cerebral palsy and spinal cord injury. This review will collate the available knowledge on the physiology of gait and balance control, focusing on the ways in which the use of NIBS may contribute to the understanding and treatment of gait disorders
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
Evaluation of central motor pathway involvement in two sibs with Pelizaeus-Merztbacher disease.
No full textAppropriate 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
[Acute poisoning by Vantal (combination of dimethoate and DDT) in a group of longshoremen].
No full textAcute i.v. vincamine teprosilate administration: quantified investigation in elderly subjects.
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