Results 41 to 50 of about 13,908 (249)

Quantitative assessment of masticatory muscles based on skull muscle attachment areas in Carnivora

The Anatomical Record, EarlyView.
Abstract Masticatory muscles are composed of the temporalis, masseter, and pterygoid muscles in mammals. Each muscle has a different origin on the skull and insertion on the mandible; thus, all masticatory muscles contract in different directions. Collecting in vivo data and directly measuring the masticatory muscles anatomically in various Carnivora ...
Kai Ito, Mugino O. Kubo, Ryo Kodera, Sei‐ichiro Takeda, Hideki Endo   +4 more
wiley   +1 more source

Efficiency of small mammal trapping in an Atlantic Forest fragmented landscape: the effects of trap type and position, seasonality and habitat

Brazilian Journal of Biology
Trapping methods can strongly influence the sampling of mammal communities. This study compared the efficiency of the capture of small mammals in Sherman traps in two positions (at ground level and in trees) and pitfall traps in a fragmented landscape ...
ALM Vieira, AS Pires, AF Nunes-Freitas, NM Oliveira, AS Resende, EFC Campello   +5 more
doaj   +1 more source

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

The Anatomical Record, EarlyView.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source

Characterization of extracellular spike waveforms recorded in wallaby primary visual cortex

Frontiers in Neuroscience, 2023
Extracellular recordings were made from 642 units in the primary visual cortex (V1) of a highly visual marsupial, the Tammar wallaby. The receptive field (RF) characteristics of the cells were objectively estimated using the non-linear input model (NIM),
Young Jun Jung, Young Jun Jung, Young Jun Jung, Shi H. Sun, Ali Almasi, Molis Yunzab, Hamish Meffin, Michael R. Ibbotson, Michael R. Ibbotson, Michael R. Ibbotson   +9 more
doaj   +1 more source

Comparative and functional anatomy of masticatory muscles and bite force in opossums (Didelphimorphia, Didelphidae)

The Anatomical Record, EarlyView.
We describe the functional anatomy of masticatory muscles in nine opossums, finding a generalized anatomical pattern with differences related to skull morphology. Variation in quantitative myological data and estimated bite force was mostly related to size, and the increase in bite force supports dietary diversification associated with size increase ...
Juann A. F. H. Abreu, Diego Astúa
wiley   +1 more source

Assessing the potential for intraguild predation among taxonomically disparate micro-carnivores: marsupials and arthropods [PDF]

Royal Society Open Science, 2018
Interspecific competition may occur when resources are limited, and is often most intense between animals in the same ecological guild. Intraguild predation (IGP) is a distinctive form of interference competition, where a dominant predator selectively ...
Tamara I. Potter, Aaron C. Greenville, Christopher R. Dickman   +2 more
doaj   +1 more source

Presence of trypanosomatids, with emphasis on Leishmania, in Rodentia and Didelphimorphia mammals of a rural settlement in the central Amazon region

Memorias do Instituto Oswaldo Cruz, 2021
BACKGROUND Trypanosomatids are widespread and cause diseases - such as trypanosomiasis, sleeping sickness, Chagas disease, and cutaneous and visceral leishmaniasis - in animals and humans.
Genevere Reis Achilles, Rafael Pinto Kautzmann, Haile Dean Figueiredo Chagas, Jordam William Pereira-Silva, Jéssica Feijó Almeida, Fernanda Rodrigues Fonseca, Maria Nazareth Ferreira da Silva, Felipe Arley Costa Pessoa, Alessandra Ferreira Dales Nava, Claudia María Ríos-Velásquez   +9 more
doaj   +1 more source

Ontogeny of murine bony semicircular canal form

The Anatomical Record, EarlyView.
Abstract The labyrinthine geometry and functional anatomy of the semicircular canals have intrigued scientists for decades, and there has been considerable interest in understanding how these complex structures grow and develop with evidence emerging from human studies that size maturation occurs exceptionally early by comparison with other systems ...
Marcela Cárdenas‐Serna, Nathan Jeffery   +1 more
wiley   +1 more source

Population structure and vertical stratification of Micoureus paraguayanus (Didelphimorphia, Didelphidae) in lowland atlantic coastal forest fragments, southern Brazil [PDF]

Biotemas, 2006
In order to analyze Micoureus paraguayanus population structure in function of the seasonality and habitats in disturbed forest fragments, a study was carried out on three forest fragments with differences in size, isolation and degrees of deforestation ...
Helena B. Pavese, Fernando L. Souza, Fernando V. B. Goulart, Maurício E. Graipel   +3 more
doaj  

From armadillos to sloths: Patterns and variations in xenarthran coronary anatomy

The Anatomical Record, EarlyView.
Abstract Species of the superorder Xenarthra play a vital ecological role in the Neotropics. Despite their evolutionary significance, anatomical studies on their coronary circulation remain scarce. This study investigated the coronary anatomy of 82 hearts from nine Xenarthra species across the Dasypodidae, Myrmecophagidae, and Bradypodidae.
Wilson Viotto‐Souza, André Luiz Quagliatto Santos, Marcelo Abidu‐Figueiredo, Thaís Aparecida Silva, Rodrigo Ananias Barreiros Silva, Paulo de Souza‐Junior   +5 more
wiley   +1 more source