Results 211 to 220 of about 174,907 (264)

Acoustic Measures Capture Speech Dysfunction in Spinocerebellar Ataxia

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Spinocerebellar ataxias (SCA) are hereditary cerebellar degenerative disorders with a common feature of dysarthria, involving impaired phonatory and articulatory control of speech, thereby affecting social communication. In this study, we investigated whether acoustic measures could objectively measure speech dysfunction and identify
Zena Fadel, Charlotte Hennessey, Hannah Lee, Pia Parekh, Sheng‐Han Kuo, Ami Kumar   +5 more
wiley   +1 more source

Age‐Related Characteristics of SYT1‐Associated Neurodevelopmental Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives We describe the clinical manifestations and developmental abilities of individuals with SYT1‐associated neurodevelopmental disorder (Baker‐Gordon syndrome) from infancy to adulthood. We further describe the neuroradiological and electrophysiological characteristics of the condition at different ages, and explore the associations ...
Sam G. Norwitz, Josefine Eck, Joel S. Winston, Kate Baker   +3 more
wiley   +1 more source

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Dynamics of taxonomic diversity

Paleobiology, 1980
A general model of taxonomic diversity, incorporating diversity-dependent rates of origination and extinction, is constructed to examine the dynamic responses of diversity to perturbation. The model predicts that the trajectories of diversification increase and decrease are substantially different.
Timothy R. Carr, Jennifer A. Kitchell
openaire   +1 more source

Rarefaction and Taxonomic Diversity

Biometrics, 1982
Rarefaction is a technique that corrects for unbalanced sample sizes, which are often a major problem in comparisons of diversity. The rarefaction curve is the expected number of higher taxonomic groups, such as families or genera, represented in a random selection of lower taxonomic units, such as species or individuals. The shapes of these curves are
John J. Gart, Andrew F. Siegel, Rebecca Z. German   +2 more
openaire   +1 more source

Allergenic relationship between taxonomically diverse pollens

Clinical & Experimental Allergy, 1995
SummaryBackground Skin tests and tests for IgE antibodies show that subjects are usually sensitive to a number of different pollens, frequently from taxonomically diverse species which are assumed to be allergenically non‐crossreactive. This suggests that the presence of IgE antibody‐reactivity to an individual pollen may not necessarily have ...
N H, Pham, B A, Baldo
openaire   +2 more sources

Measuring beta‐diversity from taxonomic similarity

Journal of Vegetation Science, 2007
AbstractQuestion: The utility of beta (β‐) diversity measures that incorporate information about the degree of taxonomic (dis)similarity between species plots is becoming increasingly recognized. In this framework, the question for this study is: can we define an ecologically meaningful index of β‐diversity that, besides indicating simple species ...
Giovanni Bacaro, RICOTTA, Carlo, Stefano Mazzoleni   +2 more
openaire   +4 more sources

An Information-Theoretical Measure of Taxonomic Diversity

Acta Biotheoretica, 2003
Traditional diversity indices are computed from the abundances of species present and are insensitive to taxonomic differences between species. However, a community in which most species belong to the same genus is intuitively less diverse than another community with a similar number of species distributed more evenly between genera.
RICOTTA, Carlo, AVENA, Giancarlo
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Taxonomic Structure: Species Diversity

1984
Terrestrial ecologists long ago remarked on the richness of the floras and faunas of tropical environments relative to colder climates. The diversification within many specific taxonomic groups is clearly greater in the tropics than in temperate latitudes, both in terrestrial and in marine environments (Fig. 12–1).
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Taxonomic diversity estimation using rarefaction

Paleobiology, 1975
Benthic ecologists have successfully applied rarefaction techniques to the problem of compensating for the effect of sample size on apparent species diversity (= species richness). The same method can be used in studies of diversity at higher taxonomic levels (families and orders) in the fossil record where samples represent world-wide distributions of
openaire   +1 more source