Results 161 to 170 of about 255,919 (307)

Human evolution and the obstetrical dilemma: The pelvic floor hypothesis

The Anatomical Record, EarlyView.
Abstract Human childbirth is mechanically difficult because a large‐headed, broad‐shouldered fetus must pass through a comparatively narrow, twisted bony birth canal. Traditional explanations of this “obstetrical dilemma” emphasize the role of bipedal locomotion in inhibiting the evolution of a wider, more spacious pelvis.
Barbara Fischer, Ekaterina Stansfield
wiley   +1 more source

Safety Pharmacology, Toxicokinetics and Pharmacodynamics of VMX-C001, an Intravenous Bypassing Agent for Factor Xa Inhibitors, in Animal Models. [PDF]

Pharmaceutics
Verhoef D, Short G, Gomes T, Groen K, Spronk H, Ohrstrom J, Reitsma PH.   +6 more
europepmc   +1 more source

Variable grouping patterns in primates: A test of the better competitor hypothesis in male Verreaux's sifaka (Propithecus verreauxi)

The Anatomical Record, EarlyView.
Abstract Intraspecific variation in social organization (IVSO) within primate populations can arise due to male mating competition. Verreaux's sifaka (Propithecus verreauxi) populations exhibit both single‐male and multi‐male groups, providing an opportunity to examine the relationship between male competitive ability and social organization.
Lemeng Li, Stacey R. Tecot, Rebecca J. Lewis   +2 more
wiley   +1 more source

Yellow Fever Outbreaks Are Not Associated With Long-Term Negative Human Perceptions of Wild Primates in Brazil. [PDF]

Am J Primatol
Caparrós-Vallcorba C, de Abreu FVS, Simonini-Teixeira D, Pereira-Martins W, Veloso-Ramos AV, Bernal-Valle S, Martins-Carvalho M, Aquino-Teixeira SM, Jardim N, Senario T, Almeida HP, Azat C, Benavides JA.   +12 more
europepmc   +1 more source

Humans and platyrrhines share a pattern of articular variance

The Anatomical Record, EarlyView.
Abstract Previous work has identified a pattern of articular shape variation in modern human limb joints, in which convex joint surfaces exhibit constrained variance relative to their more variable concave conarticulars. This pattern is notable given that joint morphogenesis is influenced by local biomechanical environments, which vary substantially ...
Haley Horbaly, Liam Zachary
wiley   +1 more source

Linking social attention to reproductive state and future reproduction in female monkeys. [PDF]

Behav Ecol Sociobiol
Hernández-Pacheco R, Diaz AA, Aiempichitkijkarn N, Peña NC, Yahyazadehmoghaddam S, Weber J, Maldonado E, Tuljapurkar S, Rosati AG.   +8 more
europepmc   +1 more source

The “costly son” hypothesis: Sons exacerbate obstetrical dilemmas in humans and other mammals

The Anatomical Record, EarlyView.
Abstract Human childbirth has often been considered uniquely difficult among mammals, yet recent evidence suggests that obstructed labor and fetopelvic disproportion are widespread across placental mammals. Here, we propose the “costly son” hypothesis: because male offspring are typically larger at birth, they impose greater obstetric risk on mothers ...
Nicole D. S. Grunstra, Jonathan C. K. Wells   +1 more
wiley   +1 more source

Osteohistological evidence for terrestrial adaptation and an extended growth period in mekosuchine crocodylians and its potential role in their extinction

The Anatomical Record, EarlyView.
Abstract The Australasian crocodylian fossil record is dominated by the extinct endemic clade Mekosuchinae, with known members spanning the Eocene‐to‐Holocene. This diverse clade exhibited high morphological disparity, from early members superficially similar to Crocodylus, to more terrestrial forms later in the clade's evolutionary history.
Devin K. Hoffman, Cecily S. C. Nicholl, Oliver Bradley, Sreya Magar, Marie Sofia Sebaratnam, Alexandra Houssaye, Ryan N. Felice, Adam M. Yates, Stephen F. Poropat, Philip D. Mannion   +9 more
wiley   +1 more source

α-Synuclein aggregation and brain atrophy in SNCA-A53T transgenic monkeys are correlated with parkinsonism. [PDF]

Brain
Wei J, Li S, Duan D, Wu K, Liu X, Zhu R, Wang L, Wu Z, Kang Y, Si C, Zhang H, Wang H, Chen Y, Dai S, Ji W, Li G, Zhao L, Niu Y.   +17 more
europepmc   +1 more source

Regional variability in skull sexual dimorphism: Olive baboons, blue monkeys, and vervets confirm the posterior region of the skull and the snout as opposite extremes of sex differences in Old World monkeys

The Anatomical Record, EarlyView.
Abstract This study, alongside prior work on crab‐eating macaques with O'Higgins, investigates regional variation in skull sexual dimorphism across different species of Old World monkeys. Findings reveal consistent patterns: the posterior skull regions (mandibular vertical ramus, chondrocranium and, possibly, the cranial vault) exhibit lower dimorphism,
Andrea Cardini
wiley   +1 more source