How Aging Affects Grasping Behavior and Pull Strength in Captive Gray Mouse Lemurs (Microcebus murinus)

Brazidec, Marie Le; Herrel, Anthony; Zablocki‐Thomas, Pauline; Boulinguez-Ambroise, Grégoire; Aujard, Fabienne; Pouydebat, Emmanuelle

doi:10.1007/s10764-017-0001-y

Cited by 11 publications

(14 citation statements)

References 34 publications

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“…While counter to the findings of Hämäläinen et al . (), this ontogenetic trend in forelimb strength is supported by previous in vivo data on hand and foot grip strength within M. murinus , in which senescent individuals (7–8 years) showed no decline in forearm force relative to prime age (2–3 years) individuals (Le Brazidec et al ., ). These experimental data were interpreted to reflect a delay in the onset of sarcopenia within the muscles of the forelimb.…”

Section: Discussionmentioning

confidence: 97%

“…Conversely, no differences are reported between males and females, nor between younger and older adult individuals by Le Brazidec et al . ().…”

Section: Introductionmentioning

confidence: 97%

“…While ontogenetic patterns of forearm strength and flexibility are not widely reported either for M. murinus or for primates more generally, what little data exist would seem to suggest interesting developmental trends within this region. Immature mouse lemurs are reported to show relatively high grasping strength when adjusted for body mass (Boulinguez‐Ambroise et al ., ), while data on hand usage during food acquisition suggest that younger adults practice unimanual grasps more frequently than senescent individuals, suggesting some variation in forelimb use associated with aging (Le Brazidec et al ., ). However, as only experimentally derived in vivo measurements of grip strength are reported for this species, the myological changes which drive potential variation in forearm strength and flexibility during development remain unknown.…”

Section: Introductionmentioning

confidence: 97%

“…On the basis of these data (and in light of the expected effects of sarcopenia upon muscle strength in senescent individuals), we predict that forearm PCSA will exhibit a decline with the onset of senescence. However, as a more recent in vivo study (albeit on a reduced captive sample) demonstrated no significant differences in strength between young and old adult individuals (Le Brazidec et al ., ), such a relationship might instead characterize our sample. In light of the conflicting nature of this literature, we evaluate both possibilities when testing this prediction.…”

Section: Introductionmentioning

confidence: 99%

“…As such, patterns of grip strength and overall hand and wrist flexibility within strepsirrhines are of importance to our understanding of the evolution of arboreal locomotor patterns. To this end, three recent studies (Hämäläinen et al ., ; Thomas et al ., ; Le Brazidec et al ., ) have sought to examine grasping and pulling strength within the model Lemuroid taxon Microcebus murinus : a small‐bodied, highly arboreal taxon that favors narrow substrates (Martin, ; Tattersall, ). While overall pulling strength appears strongly correlated with body mass and forearm length in this species, older individuals appear relatively weaker (Thomas et al ., ).…”

Section: Introductionmentioning

confidence: 99%

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The Forearm Musculature of the Gray Mouse Lemur (Microcebus murinus): An Ontogenetic Study

Boettcher

Leonard

Dickinson

et al. 2019

The Anatomical Record

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Although studies have sought to characterize variation in forearm muscular anatomy across the primate order, none have attempted to quantify ontogenetic changes in forearm myology within a single taxon. Herein, we present muscle architecture data for the forearm musculature (flexors and extensors of the wrist and digits) of Microcebus murinus, a small Lemuroid that has been the focus of several developmental studies. A quadratic curvilinear model described ontogenetic changes in muscle mass and fascicle length; however, fascicle lengths reached peak levels at an earlier age and showed a stronger decline during senescence. Conversely, physiological cross-sectional area followed a more linear trend, increasing steadily throughout life. As previous studies into the functional role of the primate forelimb emphasize the importance of long muscle fascicles within arboreal taxa in order to maximize mobility and flexibility, the early attainment of peak fascicle lengths may consequently reflect the importance of agility within this mobile and highly arboreal species. Similarly, observed myological trends in forearm strength are supported by previous in vivo data on grip strength within M. murinus in which senescent individuals showed no decline in forearm force relative to prime age individuals. This trend is interpreted to reflect compensation for the previously reported decline in hind limb grip strength in the hind limb with age, such that older individuals are able to maintain arboreal stability. Interestingly, the ontogenetic trajectory of each architectural variable mirrored previous observations of the masticatory musculature in M. murinus, suggesting that ontogenetic trends are relatively conserved between anatomical regions.

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Section: Discussionmentioning

confidence: 97%

“…Conversely, no differences are reported between males and females, nor between younger and older adult individuals by Le Brazidec et al . ().…”

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Forearm Musculature of the Gray Mouse Lemur (Microcebus murinus): An Ontogenetic Study

Boettcher

Leonard

Dickinson

et al. 2019

The Anatomical Record

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Increased performance in juvenile baboons is consistent with ontogenetic changes in morphology

Boulinguez-Ambroise

Herrel

Bérillon

et al. 2021

American J Phys Anthropol

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Objectives: In many primates, the greater proportion of climbing and suspensory behaviors in the juvenile repertoire likely necessitates good grasping capacities. Here, we tested whether very young individuals show near-maximal levels of grasping strength, and whether such an early onset of grasping performance could be explained by ontogenetic variability in the morphology of the limbs in baboons.Material and methods: We quantified a performance trait, hand pull strength, at the juvenile and adult stages in a cross-sectional sample of 15 olive baboons (Papio anubis). We also quantified bone dimensions (i.e., lengths, widths, and heights) of the fore-(n = 25) and hind limb (n = 21) elements based on osteological collections covering the whole development of olive baboons.Results: One-year old individuals demonstrated very high pull strengths (i.e., 200% of the adult performance, relative to body mass), that are consistent with relatively wider phalanges and digit joints in juveniles. The mature proportions and shape of the forelimb elements appeared only at full adulthood (i.e., ≥4.5 years), whereas the mature hind limb proportions and shape were observed much earlier during development.Discussion: These changes in limb performance and morphology across ontogeny may be explained with regard to behavioral transitions that olive baboons experience during their development. Our findings highlight the effect of infant clinging to mother, an often-neglected feature when discussing the origins of grasping in primates. The differences in growth patterns, we found between the forelimb and the hind limb further illustrate their different functional roles, having likely evolved under different ecological pressures (manipulation and locomotion, respectively).

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Aging in nonhuman primates

Tardif

Ross

2021

Handbook of the Biology of Aging

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How Aging Affects Grasping Behavior and Pull Strength in Captive Gray Mouse Lemurs (Microcebus murinus)

Cited by 11 publications

References 34 publications

The Forearm Musculature of the Gray Mouse Lemur (Microcebus murinus): An Ontogenetic Study

The Forearm Musculature of the Gray Mouse Lemur (Microcebus murinus): An Ontogenetic Study

Increased performance in juvenile baboons is consistent with ontogenetic changes in morphology

Aging in nonhuman primates

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