1,720,971 research outputs found
Head Tilt Posturography: Clinical Value in Peripheral Labirinthine Disorders.
No full textAcute vestibular injury, such as vestibular neuritis (VN), can produce a profound
alteration in balance manifested by perception disorder and impaired control of
postural adjustment and execution of movements. Stabilometry assesses posture
balance through the quantification of body oscillations from the orthostatic position in
a force platform. It involves monitoring center of pressure (COP) displacement to the
lateral direction (X) and anterior-posterior direction (Y). In our study we investigated
the postural control of patients affected by VN. We analyzed 30 subjects: 15 patients
constituted the case group affected by VN were compared with 15 healthy volunteers.
A static posturography was made within 6-24 hours of symptoms onset. Our purpose
was to assess the use of posturography Fourier Frequency analysis with head tilt for the
detection of peripheral vertigo destabilization. Fourier spectral analysis of body sway
reveals that, independently from visual control, patients exhibit a significantly higher
level of low/middle frequency oscillations on the frontal plane. The macular stimulation
by head tilt increases significantly the difference in all analyzed parameters: there are
significant differences of body oscillation in the patients vs controls on X and Y planes,
the latter evident only in head tilt tests. The head tilt seems to show an antero-posterior
plane destabilization otherwise not evident
The Role of Balloon Sinuplasty in the Treatment of Vacuum Rhinogenic Headache
Full text linkIn this study we tried to demonstrate how balloon sinuplasty could be an option in the treatment of the Rhinogenic Headache due to a probably disventilation of frontal sinus recess. 107 patients were included in the study with diagnosis of Rhinogenic Headache. The surgical group underwent bilateral balloon sinuplasty of the frontal sinus. The medical group underwent pharmacological treatment. Headaches characteristics were evaluated by a clinical personal diary. The severity was recorded by Visual Analog Scale 4 and 8 months after treatment. 98 out of 107 patients completed the protocol. In surgical group and in medical one the mean headache score improved at four and eight months follow up. The headache frequency attacks per month decrease from a preoperative frequency of 18 (±4 SD) in surgical group and 17 (±3 SD) in medical group to 3 (±1 SD) and 6 (±3 SD) respectively at 4 months control but increased slightly to 5 (±2 SD) and 12 (±4 SD) after 8 months. We concluded that the balloon sinuplasty should be considered as an effective alternative option after an accurate selection of surgical candidates. However, it is important a 6-8 month follow-up to evaluate the efficacy and stability of the treatment used
Anatomic landmarks for masseteric nerve identification: Anatomic study for a new reference point
No full textThe masseteric nerve is often used as a donor nerve in the treatment of facial paralysis. Even if several anatomical studies described landmarks for its identification, their main disadvantages are the anatomical variability and the changes due to surgery. Sixteen dissections were performed on cadaveric specimens. The masseteric muscle (MM), the zygomatic arch (ZA), the masseteric nerve (MN) and the zygomatic branch of the facial nerve (ZB) were identified and their relationships were measured. The relationships between MN and ZB resulted to be constant, with MN intersecting ZB at a depth of 0,78 cm in the muscle, 1,6 cm below ZA and 0,8 cm from the posterior border of MM. The measures obtained demonstrated as the main zygomatic branch of the facial nerve can be a suitable landmark for the identification of the masseteric nerve, with no variations due to the surgical procedure or patient characteristics
Intranasal hyaluronic acid improves the audiological outcomes of children with otitis media with effusion
No full textGoing 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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