Results 131 to 140 of about 338,930 (234)

Scratching beneath the surface: Quantification of muscle architecture and myosin heavy chain content in the forelimbs of black‐tailed prairie dogs (Cynomys, Rodentia)

Journal of Anatomy, EarlyView.
Black‐tailed prairie dogs are highly social ground squirrels that excavate communal burrow systems, most often in medium‐textured soils. Their forelimbs demonstrate morphofunctional trade‐offs for scratch‐digging and terrestrial ecology, including well‐developed and fast‐contracting proximal musculature with large mechanical advantage paired with ...
Luke A. Scheetz, Carter A. Burnett, Benjamin R. Kimble, David A. Eads, Michael T. Butcher   +4 more
wiley   +1 more source

Comparative histological analysis of vertebrates reveals Triassic climate variability across southern Pangea

Journal of Anatomy, EarlyView.
Bone tissues of Triassic taxa reveal life history signals consistent with climatic variation across southern Pangea, spanning present‐day Brazil, Argentina, Zimbabwe, and India. Slower growth patterns within the Zimbabwean assemblage suggest a comparatively more arid intracontinental environment than those closer to the coast. Artwork by Andrey Atuchin.
Valerie Trinidad, Darlington Munyikwa, Michel Zondo, Timothy J. Broderick, Sterling J. Nesbitt, Stephen Tolan, Christopher Griffin   +6 more
wiley   +1 more source

How do forelimb long bones adapt in rhinoceroses? An in‐depth examination of their microanatomy

Journal of Anatomy, EarlyView.
Here, we study the bone structure in the forelimb long bones of the five extant species of rhinoceroses. By combining traditional description of virtual sections made on the bones (A) with in‐depth cartographies of the variation of bone compactness and anisotropy (B), we show how bone tissue can adapt to extreme forces and constraints in the second ...
Cyril Etienne, Axel de Jesus, Vincent Fernandez, Alexandra Houssaye   +3 more
wiley   +1 more source

Functional morphology and biomechanics of the locomotor apparatus in the large Late Triassic carnivore Postosuchus kirkpatricki (Archosauria: Rauisuchidae)

Journal of Anatomy, EarlyView.
A three‐dimensional model is used to analyze the locomotor biomechanics of the large Late Triassic archosaurian reptile Postosuchus kirkpatricki. The study finds that it is more uncertain than previously concluded whether it was quadrupedal or bipedal, and plantigrade or digitigrade, but it clearly had locomotor specializations including large hindlimb
John R. Hutchinson, Emily Faughey, Matthew Humpage, Tristan Dupuis, Oliver E. Demuth, Romain Pintore, Francois Clarac   +6 more
wiley   +1 more source

The pectoralis muscle orientation as an indicator of the modes of wing‐propelled locomotion in birds

Journal of Anatomy, EarlyView.
The pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Takumi Akeda, Shin‐ichi Fujiwara
wiley   +1 more source

Cumulative effects of lifelong systemic excess growth hormone on postcranial skeletal morphology in adult mice

Journal of Anatomy, EarlyView.
Our μCT‐based pilot study reveals size and shape disparity in the adult postcranial skeleton of growth‐hormone model (bGH) mice relative to wild‐type mice. bGH mice have larger and more sexually dimorphic bones, with a systemic radiodensity increase in bony sesamoids and associated, but typically uncalcified, soft tissues.
Joseph R. Groenke, Huanhuan Liu, Grace Lach, Abhishek Wajpe, Darlene Berryman, John J. Kopchick, Shouan Zhu, Patrick M. O'Connor   +7 more
wiley   +1 more source

From sagittal to sprawled: Clavicular co‐option and the evolution of forelimb mechanics in talpines

Journal of Anatomy, EarlyView.
Forelimb posture in Eulipotyphla divides into sagittal and sprawled groups with distinct scapular and clavicular orientations. First true rib strength scales with body mass, reflecting vertical ground reaction forces, whereas clavicular strength reflects differences in medially directed forces on the pectoral girdle, especially pronounced in highly ...
Shin‐ichi Fujiwara, Hiroaki Saito
wiley   +1 more source

Olecranon flip osteotomy for distal humerus fractures. [PDF]

Oper Orthop Traumatol
van Veelen NM, Victor K, Lambert S, Beeres FJP, Babst R.   +4 more
europepmc   +1 more source

Human dissection and comparative anatomy: Archaeological evidence for nineteenth‐century anatomical practice at University College London

Journal of Anatomy, EarlyView.
Excavation at University College London revealed more than 8700 human skeletal fragments representing at least 38 individuals, alongside over 800 animal remains. Features consistent with dissection, specimen preparation and curation provide evidence for the use of human and animal material in nineteenth‐century anatomical education, offering rare ...
Wendy Birch, Tania Kausmally
wiley   +1 more source

Transphyseal Separation of the Distal Humerus in a 5-Year-Old Child: A Rare Case Report. [PDF]

Case Rep Orthop
Pokhrel S, Karki S, Sah S, Tiwari G.
europepmc   +1 more source