Publicaties
Gekozen filters:
Gekozen filters:
How Pendulum-Like Are Siamangs? Energy Exchange During Brachiation Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Gent Universiteit Antwerpen
Hylobatidae (gibbons and siamangs) are known for their brachiation skills. The comparison of brachiation with a pendulum is made several times in the literature, and the costs and benefits of being pendulum-like are well described. However, the amount of energy exchange during brachiation of gibbons has rarely been determined. In this study, the amount of energy recovery (ER) during brachiation is assessed for three siamangs in a seminatural ...
Muscle moment arms and function of the siamang forelimb during brachiation Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Antwerpen Universiteit Gent
Moment arms have an important modulating impact on muscle function, as they represent the capacity of the muscle to convert muscle action into limb movements. In the current paper, we provide muscle moment arm data of the forelimb of four siamangs, collected by detailed dissections on unfixed cadavers. The aim of this study is to assess the role of different forelimb muscles during brachiation. Moment arm data are compared with similar published ...
The forearm and hand musculature of semi-terrestrial rhesus macaques (Macaca mulatta) and arboreal gibbons (fam.Hylobatidae). Part II. Quantitative analysis KU Leuven
Nonhuman primates have a highly diverse locomotor repertoire defined by an equally diverse hand use. Based on how primates use their hands during locomotion, we can distinguish between terrestrial and arboreal taxa. The 'arboreal' hand is likely adapted towards high wrist mobility and grasping, whereas the 'terrestrial' hand will show adaptations to loading. While the morphology of the forearm and hand bones have been studied extensively, ...
The forearm and hand musculature of terrestrial rhesus macaques (Macaca mulatta) and arboreal gibbons (fam. Hylobatidae). Part I. Description and comparison of the muscle configuration. KU Leuven
Primates live in very diverse environments and, as a consequence, show an equally diverse locomotor behaviour. During locomotion, the primate hand interacts with the superstrate and/or substrate and will therefore probably show adaptive signals linked with this locomotor behaviour. Whereas the morphology of the forearm and hand bones have been studied extensively, the functional adaptations in the hand musculature have been documented only ...
Segmental morphometrics of the southern yellow-cheeked crested gibbon (**Nomascus gabriellae**) Universiteit Antwerpen
Gibbon species are highly specialized for brachiation. Nevertheless, as with all primates, they are capable of various posturo-locomotor modes as part of a larger overall positional repertoire. In this context, the study of their locomotor apparatus is very relevant to better understand their evolution toward such specialization for brachiation on the one hand, and the degree to which their body may reflect compromises on the other hand. Indeed, ...
Mechanical constraints on the functional morphology of the gibbon hind limb. Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Antwerpen
Gibbons utilize a number of locomotor modes in the wild, including bipedalism, leaping and, most of all, brachiation. Each locomotor mode puts specific constraints on the morphology of the animal; in some cases these may be complementary, whereas in others they may conflict. Despite several studies of the locomotor biomechanics of gibbons, very little is known about the musculoskeletal architecture of the limbs. In this study, we present ...
Further delineation of facioaudiosymphalangism syndrome Universiteit Antwerpen Universiteit Gent
Mutations in the NOG gene give rise to a wide range of clinical phenotypes. Noggin, the protein encoded by this gene is a secreted modulator of multiple pathways involved in both bone and joint development. Proximal symphalangism is commonly observed in patients bearing mutations in this gene, however secondary symptomes are often found including typical facies with hemicylindrical nose with bulbous tip, hyperopia, reduced mobility of multiple ...
Negative mutation screening of the NOG, BMPR1B, GDF5, and FGF9 genes indicates further genetic heterogeneity of the facioaudiosymphalangism syndrome Universiteit Antwerpen
We report on a patient with a clinical phenotype showing all the features of the multiple synostoses syndrome or the facioaudiosymphalangism syndrome, including symphalangism, condunction deafness, and the typical facies. Previously, it was shown that this condition is genetically heterogeneous with initially mutations described in the NOG gene, coding for Noggin, an extracellular antagonist of bone morphogenetic proteins. Noggin also interacts ...
Focal growth disturbances Universiteit Gent
Focal growth disturbances of the limbs include bone deficiency, supernumerary bones, segmentation anomalies, bowing deformities, or hypertrophy of bones. They may be associated with abnormalities of other organ systems in the direct surroundings of the abnormal bone, such as the skin, heart, abdominal viscera, or central nervous system. This chapter focuses on the value of imaging with emphasis on conventional radiography in the diagnosis of ...