Los análisis morfométricos conllevan sesgos en el nivel de precisión, y por ende, error.El desarr... more Los análisis morfométricos conllevan sesgos en el nivel de precisión, y por ende, error.El desarrollo de la morfometría geométrica ha permitido generar colecciones digitalesque albergan archivos procedentes de fuentes diversas. El uso combinado de digital-izaciones obtenidas a través de técnicas diferentes introduce un nuevo tipo de error,el error intermétodo. El uso de estas fuentes de digitalización de manera conjuntase producirá con un error bajo, siempre y cuando no existan diferencias significativas entre técnicas. Se realizaron análisis de la varianza Procustes, análisis de componentesprincipales sobre las coordenadas Procrustes y agrupamiento jerárquico para anali-zar el error intermétodo e intraobservador en ocho cráneos humanos originarios dePatagonia Austral, digitalizados mediante tomografía computarizada, escáner de su-perficie y fotogrametría, utilizando para ello 35 puntos homólogos, tipos I, II y III. Losresultados muestran que no hay diferencias significativas entre ...
Adaptations of the lower back to bipedalism are frequently discussed but infrequently demonstrate... more Adaptations of the lower back to bipedalism are frequently discussed but infrequently demonstrated in early fossil hominins. Newly discovered lumbar vertebrae contribute to a near-complete lower back of Malapa Hominin 2 (MH2), offering additional insights into posture and locomotion in Australopithecus sediba. We show that MH2 possessed a lower back consistent with lumbar lordosis and other adaptations to bipedalism, including an increase in the width of intervertebral articular facets from the upper to lower lumbar column (‘pyramidal configuration’). These results contrast with some recent work on lordosis in fossil hominins, where MH2 was argued to demonstrate no appreciable lordosis (‘hypolordosis’) similar to Neandertals. Our three-dimensional geometric morphometric (3D GM) analyses show that MH2’s nearly complete middle lumbar vertebra is human-like in overall shape but its vertebral body is somewhat intermediate in shape between modern humans and great apes. Additionally, it b...
Presentacion de una comunicacion dada en: II Iberian Symposium on geometric morphometrics, celebr... more Presentacion de una comunicacion dada en: II Iberian Symposium on geometric morphometrics, celebrado los dias 9 y 10 de junio de 2016 en Madrid
Consejeria de Educacion, Cultura y Deporte de la Ciudad Autonoma de Ceuta. Universidad Espanola d... more Consejeria de Educacion, Cultura y Deporte de la Ciudad Autonoma de Ceuta. Universidad Espanola de Educacion a Distancia. Universidad de Cadiz.
Neanderthal infants had a short and deep ribcage that was genetically determined and able to sust... more Neanderthal infants had a short and deep ribcage that was genetically determined and able to sustain the high metabolism of their massive bodies.
Los análisis morfométricos conllevan sesgos en el nivel de precisión, y por ende, error.El desarr... more Los análisis morfométricos conllevan sesgos en el nivel de precisión, y por ende, error.El desarrollo de la morfometría geométrica ha permitido generar colecciones digitalesque albergan archivos procedentes de fuentes diversas. El uso combinado de digital-izaciones obtenidas a través de técnicas diferentes introduce un nuevo tipo de error,el error intermétodo. El uso de estas fuentes de digitalización de manera conjuntase producirá con un error bajo, siempre y cuando no existan diferencias significativas entre técnicas. Se realizaron análisis de la varianza Procustes, análisis de componentesprincipales sobre las coordenadas Procrustes y agrupamiento jerárquico para anali-zar el error intermétodo e intraobservador en ocho cráneos humanos originarios dePatagonia Austral, digitalizados mediante tomografía computarizada, escáner de su-perficie y fotogrametría, utilizando para ello 35 puntos homólogos, tipos I, II y III. Losresultados muestran que no hay diferencias significativas entre ...
Adaptations of the lower back to bipedalism are frequently discussed but infrequently demonstrate... more Adaptations of the lower back to bipedalism are frequently discussed but infrequently demonstrated in early fossil hominins. Newly discovered lumbar vertebrae contribute to a near-complete lower back of Malapa Hominin 2 (MH2), offering additional insights into posture and locomotion in Australopithecus sediba. We show that MH2 possessed a lower back consistent with lumbar lordosis and other adaptations to bipedalism, including an increase in the width of intervertebral articular facets from the upper to lower lumbar column (‘pyramidal configuration’). These results contrast with some recent work on lordosis in fossil hominins, where MH2 was argued to demonstrate no appreciable lordosis (‘hypolordosis’) similar to Neandertals. Our three-dimensional geometric morphometric (3D GM) analyses show that MH2’s nearly complete middle lumbar vertebra is human-like in overall shape but its vertebral body is somewhat intermediate in shape between modern humans and great apes. Additionally, it b...
Presentacion de una comunicacion dada en: II Iberian Symposium on geometric morphometrics, celebr... more Presentacion de una comunicacion dada en: II Iberian Symposium on geometric morphometrics, celebrado los dias 9 y 10 de junio de 2016 en Madrid
Consejeria de Educacion, Cultura y Deporte de la Ciudad Autonoma de Ceuta. Universidad Espanola d... more Consejeria de Educacion, Cultura y Deporte de la Ciudad Autonoma de Ceuta. Universidad Espanola de Educacion a Distancia. Universidad de Cadiz.
Neanderthal infants had a short and deep ribcage that was genetically determined and able to sust... more Neanderthal infants had a short and deep ribcage that was genetically determined and able to sustain the high metabolism of their massive bodies.
Ramos, J., Bernal, D., Vijande, E. y Cantillo, J.J. (Eds.): El abrigo y la cueva de Benzú: memoria de los trabajos arqueológicos de una decáda en Ceuta (2002-2012): 691-701. Servicio de Publicaciones Universidad de Cádiz y Ciudad Autónoma de Ceuta, 2013
The thorax and pelvis are integrated systems,
important for understanding human body shape
and ev... more The thorax and pelvis are integrated systems, important for understanding human body shape and evolution. Research has shown that in the lower thorax, sexual dimorphism and allometry produce wider ribcages in larger males and narrower ones in smaller females. If the pelvis and thorax are integrated, we would expect that the upper pelvis would similarly be wider in larger males and narrower in smaller females. Within this framework of torso integration, we explore allometry and sexual dimorphism in ossa coxae. From a human sample with variation in body size (25 males, 25 females, Bass Collection; N=3 small-bodied humans, AMNH), we measured 142 (semi)landmarks on coxal bones and analyzed them using Geometric morphometrics. These results explore how sexual dimorphism and allometry affect torso width measured from pelvis morphology compared to previous studies of the ribcage. Males and females differ both allometrically and non-allometrically. Allometrically, smaller individuals have wider ossa coxae than larger individuals, regardless of sex; non-allometrically, females have a wider pelvic inlet than males, presumably due to obstetric adaptations. Both findings contradict previous results on lower ribcage dimensions. Our results show that while allometry and sexual dimorphism are important factors explaining ossa coxae morphology, they affect the pelvis and thorax differently, challenging the torso integration model. Morphological and positional relations between both hip bones and the sacrum could account for this. However, interactions between 3D-pelvis shape and size and stature are likely important in the context of pelvis reconstructions and body shape in small-bodied humans and hominins.
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important for understanding human body shape
and evolution. Research has shown that in the
lower thorax, sexual dimorphism and allometry
produce wider ribcages in larger males and
narrower ones in smaller females. If the pelvis
and thorax are integrated, we would expect that
the upper pelvis would similarly be wider in larger
males and narrower in smaller females. Within
this framework of torso integration, we explore
allometry and sexual dimorphism in ossa coxae.
From a human sample with variation in body
size (25 males, 25 females, Bass Collection;
N=3 small-bodied humans, AMNH), we measured
142 (semi)landmarks on coxal bones and
analyzed them using Geometric morphometrics.
These results explore how sexual dimorphism
and allometry affect torso width measured from
pelvis morphology compared to previous studies
of the ribcage. Males and females differ both allometrically
and non-allometrically. Allometrically,
smaller individuals have wider ossa coxae than
larger individuals, regardless of sex; non-allometrically,
females have a wider pelvic inlet than
males, presumably due to obstetric adaptations.
Both findings contradict previous results on lower
ribcage dimensions. Our results show that while
allometry and sexual dimorphism are important
factors explaining ossa coxae morphology, they affect the pelvis and thorax differently, challenging
the torso integration model. Morphological and
positional relations between both hip bones and
the sacrum could account for this. However, interactions
between 3D-pelvis shape and size and
stature are likely important in the context of pelvis
reconstructions and body shape in small-bodied
humans and hominins.