Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat

Morphometric parameters of olfactory brain components show species-dependent variations. However, the association of these parameters with olfactory function vis-à-vis ecological and evolutionary behaviors is poorly understood. In this study, a morphometric analysis of the olfactory bulb, tract and...

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Autores principales:	Kavoi,Boniface M, Jameela,Hassanali
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2011
Materias:	Morphometry Olfactory brain Human Dog Goat
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300047
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spelling	oai:scielo:S0717-950220110003000472012-06-11Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and GoatKavoi,Boniface MJameela,Hassanali Morphometry Olfactory brain Human Dog Goat Morphometric parameters of olfactory brain components show species-dependent variations. However, the association of these parameters with olfactory function vis-à-vis ecological and evolutionary behaviors is poorly understood. In this study, a morphometric analysis of the olfactory bulb, tract and stria was carried out in three ecologically diverse animals comprising humans (primate), dogs (carnivore) and goats (herbivore) to elucidate differences in morphometry in relation to olfactory function. Using formalin-fixed brains, volumes and linear measurements of the olfactory structures were determined and correlated with those of cerebrum and the whole brain. The volume of the olfactory bulb was greatest in dogs, followed by goats and humans and constituted 0.31%, 0.18% and 0.01%, respectively, of the brain volume. Similarly, the ratio of volume of the bulb, tract and stria to that of brain was 1.95% in the dog, 0.77% in the goat and 0.03% in the human. The width of the bulb was greatest (p< 0.05) in dogs (10.80± 1.64mm) compared to goats (8.25± 0.96mm) and humans (5.50± 0.71mm), and accounted for a hemisphere breadth of 42.91%, 29.73% and 8.94% respectively. Interestingly though, the total length of the olfactory bulb, tract and striae increased in the order of goat (34.5±1.30mm), human (36.25±1.70mm) and dog (48.20±1.92mm), and constituted 21.47%, 51.87% and 72.30%, respectively, of the hemisphere length. These results suggest that the morphometric adaptations of the olfactory components to olfactory function decline from the dog, to goat, to human, and this may be indicative of the varied olfactory functional needs in regard to the ecological diversity of these species.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.29 n.3 20112011-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300047en10.4067/S0717-95022011000300047
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Morphometry Olfactory brain Human Dog Goat
spellingShingle	Morphometry Olfactory brain Human Dog Goat Kavoi,Boniface M Jameela,Hassanali Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
description	Morphometric parameters of olfactory brain components show species-dependent variations. However, the association of these parameters with olfactory function vis-à-vis ecological and evolutionary behaviors is poorly understood. In this study, a morphometric analysis of the olfactory bulb, tract and stria was carried out in three ecologically diverse animals comprising humans (primate), dogs (carnivore) and goats (herbivore) to elucidate differences in morphometry in relation to olfactory function. Using formalin-fixed brains, volumes and linear measurements of the olfactory structures were determined and correlated with those of cerebrum and the whole brain. The volume of the olfactory bulb was greatest in dogs, followed by goats and humans and constituted 0.31%, 0.18% and 0.01%, respectively, of the brain volume. Similarly, the ratio of volume of the bulb, tract and stria to that of brain was 1.95% in the dog, 0.77% in the goat and 0.03% in the human. The width of the bulb was greatest (p< 0.05) in dogs (10.80± 1.64mm) compared to goats (8.25± 0.96mm) and humans (5.50± 0.71mm), and accounted for a hemisphere breadth of 42.91%, 29.73% and 8.94% respectively. Interestingly though, the total length of the olfactory bulb, tract and striae increased in the order of goat (34.5±1.30mm), human (36.25±1.70mm) and dog (48.20±1.92mm), and constituted 21.47%, 51.87% and 72.30%, respectively, of the hemisphere length. These results suggest that the morphometric adaptations of the olfactory components to olfactory function decline from the dog, to goat, to human, and this may be indicative of the varied olfactory functional needs in regard to the ecological diversity of these species.
author	Kavoi,Boniface M Jameela,Hassanali
author_facet	Kavoi,Boniface M Jameela,Hassanali
author_sort	Kavoi,Boniface M
title	Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
title_short	Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
title_full	Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
title_fullStr	Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
title_full_unstemmed	Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat
title_sort	comparative morphometry of the olfactory bulb, tract and stria in the human, dog and goat
publisher	Sociedad Chilena de Anatomía
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300047
work_keys_str_mv	AT kavoibonifacem comparativemorphometryoftheolfactorybulbtractandstriainthehumandogandgoat AT jameelahassanali comparativemorphometryoftheolfactorybulbtractandstriainthehumandogandgoat
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Comparative Morphometry of the Olfactory Bulb, Tract and Stria in the Human, Dog and Goat

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