Results 181 to 190 of about 308,349 (254)

The mechanism of labor in nonhuman primates: A look inside

The Anatomical Record, EarlyView.
Abstract While in humans, the flexed position of the fetus and its rotating course down the birth canal are well documented, in other primates the mechanism of labor is unknown. Despite the lack of comparative data, it is commonly assumed that the human obstetric mechanism is unique, and anthropologists have disputed when and why the transition to the ...
Melissa K. Stoller
wiley   +1 more source

Postcranial anatomy and osteohistology of an early prozostrodont cynodont from the Upper Triassic of Brazil

The Anatomical Record, EarlyView.
Abstract Prozostrodon brasiliensis, a probainognathian cynodont of the clade Prozostrodontia, is recognized as a key taxon for understanding the origin of Mammaliaformes and mammals. Despite detailed investigations of its cranial anatomy, the postcranial skeleton has received comparatively less attention.
Iasmim M. Michelotti, Lívia Roese‐Miron, Brodsky Dantas Macedo Farias, Marina Bento Soares, Leonardo Kerber   +4 more
wiley   +1 more source

Developmental differences in cortical bone structure in chimpanzee and human femora reflect early locomotor independence in humans

The Anatomical Record, EarlyView.
Abstract The cortical bone structure of long bone diaphyses changes throughout growth via skeletal modeling and has important implications for bone strength and structural integrity. Ontogenetic trends in diaphyseal structure have been identified in both chimpanzees and humans but it is not yet clear how these trends compare given notable differences ...
Karen R. Swan, Rachel Ives, Zewdi J. Tsegai, Louise T. Humphrey   +3 more
wiley   +1 more source

Scaling and ecomorphology of lagomorph body shape and appendicular skeleton

The Anatomical Record, EarlyView.
Abstract Body shape is one of the most prominent features of phenotypic variation. Yet, mammalian body shapes are poorly quantified and the underlying components contributing to its diversity and its relationship to other skeletal components are rarely tested.
Nia Brice, Coby Huizenga, Chris J. Law
wiley   +1 more source

Bite force estimates and morphological correlations of jaw muscles in parrots

The Anatomical Record, EarlyView.
Abstract Parrots (Order: Psittaciformes) are renowned for their high bite force (BF) and morphological correlates thereof, including a highly mobile skull and two unique mandibular adductor muscles—m. pseudomasseter and m. ethmomandibularis, with the former being hypothesized to increase force output.
Ana Carolina L. Faillace, Arin Berger, Marcelo Ismar S. Santana, Adam Hartstone‐Rose   +3 more
wiley   +1 more source

Fascicle measurement methods do result in lengths that are significantly different

The Anatomical Record, EarlyView.
A recent comparison of the most prevalent methods for measuring fascicles, in situ measurement versus chemical digestion, concluded that the measurements are indistinguishable based on data from different conspecific individuals. However, our study of contralateral muscles of the same individuals shows that the methods clearly result in statistically ...
Katherine M. Clark, Reece A. Brown, Maggie Funderburk, Elise S. Bush, Anthony Herrel, Adam Hartstone‐Rose   +5 more
wiley   +1 more source

Comparative analysis of cytoarchitectonic and neurochemical aspects of the globus pallidus in the rock cavy (Kerodon rupestris) and the common marmoset (Callithrix jacchus)

The Anatomical Record, EarlyView.
Abstract The globus pallidus (GP), a subcortical structure within the basal ganglia, plays a crucial role in modulating cortico‐subcortical circuits related to motor control and associative/limbic functions. However, the cytoarchitectonic and neurochemical organization of this structure remains poorly characterized in naturally existing wild‐type ...
Lavínnya Yáskara de Aquino Matoso, Yasmin Pinto Fernandes Albuquerque, Karina Maia Paiva, Rodrigo Freire Oliveira, Nelyane Nayara Martins de Santana, Expedito Silva do Nascimento‐Júnior, Rovena Clara G. J. Engelberth, Jeferson de Souza Cavalcante, Adhil Bhagwandin, Paulo Leonardo Araújo de Góis Morais, José Rodolfo Lopes de Paiva Cavalcanti   +10 more
wiley   +1 more source

Pelvic breadth and juvenile locomotor energetics: Implications for the obstetrical dilemma hypothesis across human growth in past and present humans

The Anatomical Record, EarlyView.
Abstract The obstetrical dilemma hypothesis (ODH) proposes an evolutionary trade‐off between obstetric requirements and locomotor performance. However, whether external pelvic breadth measures influence walking energetics during human growth remains poorly understood.
Guillermo Zorrilla‐Revilla, Olalla Prado‐Nóvoa, Kevin P. Davy, José Miguel Carretero, Rebeca García‐González   +4 more
wiley   +1 more source

First Record of Tasmanian Devils in the Pilbara: Late Quaternary Subfossils From Juukan Gorge, Puutu Kunti Kurrama Country, and Insights Into Human—Faunal Relationships and Extinction

Archaeology in Oceania, EarlyView.
ABSTRACT This study presents the first unequivocal evidence for the presence of Tasmanian devils (Sarcophilus harrisii) in the Pilbara region of northwestern Australia, based on material recovered from archaeological excavations at Juukan Gorge on Puutu Kunti Kurrama and Pinikura country.
Timothy J. Churchill, Michael Slack, Elise Matheson, Liam Neill, Wanchese M. Saktura, Gavin Ashburton   +5 more
wiley   +1 more source

Preoperative Sagittal Tibial Tubercle‐Trochlear Groove Distance Predicts Postoperative Outcome in Patients Undergoing Combined Trochleoplasty and Medial Patellofemoral Ligament Reconstruction

Arthroscopy, EarlyView.
Purpose To evaluate the association between the preoperative sagittal tibial tubercle‐trochlear groove (sTTTG) distance and postoperative patient‐reported outcomes after combined patellofemoral ligament reconstruction and deepening trochleoplasty in patients with recurrent lateral patellar instability and high‐grade trochlear dysplasia.
Sebastian Schmidt, Luis Navas, Felix Zimmermann, Abd El Nasser Oudeh, Christian Lattermann, Peter Balcarek   +5 more
wiley   +1 more source