Results 111 to 120 of about 24,699 (303)

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

Tracing the evolutionary history of the morpho‐anatomy of baculum in primates

The Anatomical Record, EarlyView.
Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani, Maria Pia Morigi, Matteo Bettuzzi, Monica Carosi   +3 more
wiley   +1 more source

Hopf bifurcation analysis in a predator–prey model with time delay and food subsidies

Advances in Difference Equations, 2019
We analyze the stability of positive equilibrium in a predator-prey model with time delay τ and subsidies. The sufficient conditions of the local Hopf bifurcations at the positive equilibrium are obtained.
Yuxiao Guo, Nannan Ji, Ben Niu
doaj   +1 more source

Bifurcation from intervals for Sturm-Liouville problems and its applications

Electronic Journal of Differential Equations, 2014
Summary: We study the unilateral global bifurcation for the nonlinear Sturm-Liouville problem \[ \displaylines{ -(pu')'+qu=\lambda au+af(x,u,u',\lambda)+g(x,u,u',\lambda) \text{ for }x\in(0,1),\cr b_0u(0)+c_0u'(0)=0,\quad b_1u(1)+c_1u'(1)=0, } \] where \(a\in C([0, 1], [0,+\infty))\) and \(a(x)\not\equiv 0\) on any subinterval of \([0, 1], f,g\in C([0 ...
Guowei Dai, Ruyun Ma
openaire   +2 more sources

Animal empathy reconsidered: a multidimensional profile account

Biological Reviews, EarlyView.
ABSTRACT Empathy is the glue that holds societies together and yet several fundamental questions about empathy persist. What is empathy (the definitional question)? Is it uniquely human and, if not, which nonhuman animals possess empathy (the distribution question)? Which type or quality of empathy is realized in different species (the quality question)
Albert Newen, Maja Griem, Ludwig Huber, Thomas Bugnyar, Aaron Blaisdell, Simone Pika   +5 more
wiley   +1 more source

BIFURCATION ANALYSIS IN A PWM CURRENT-CONTROLLED H-BRIDGE INVERTER

, 2011
This paper introduces the complete bifurcation analysis in a PWM current-controlled H-Bridge inverter in a wide parameter space. First, we briefly explain the behavior of the waveform in the circuit in terms of the switched dynamical system.
HIROYUKI ASAHARA, TAKUJI KOUSAKA
core   +1 more source

Bilateral Symmetry and Variation of Recurrent Laryngeal Nerve and Inferior Thyroid Artery Patterns: An Intraoperative Study of 150 Nerves

Clinical Anatomy, EarlyView.
ABSTRACT The anatomical relationship of the inferior thyroid artery (ITA) and the recurrent laryngeal nerve (RLN) is highly variable. This study aims to evaluate bilateral RLN branching patterns and their relationship to the ITA within the same patient, predicting contralateral anatomical variations and ultimately reducing intraoperative risk of RLN ...
Mark Yanni, Stavroula Mouratidou, Aleix Rovira, Ricard Simo   +3 more
wiley   +1 more source

A Systematic Review and Meta-analysis of Prevalence of Common Carotid Artery Branching Variations at Different Vertebral Levels and Methodological Approaches

National Journal of Clinical Anatomy
Background and Objectives: Considerable variability exist in common carotid artery branching (CAB) level. The objective of this review and meta-analysis was to determine the overall prevalence of CAB in relation thyroid cartilage or in relation to ...
S. Viveka, S. Raghu, Sreenidhi Sediguli, C. Shivaleela, B. Srinivasa Sagar, P. Bhavana, U. H. Aisiri, N. Manoj, V. Apoorva, Ayesha Arfa, N. Arun Kumar   +10 more
doaj   +1 more source

One Anatomy, Multiple Valve Choices: Interobserver Agreement in Selecting Transcatheter Pulmonary Valve

Catheterization and Cardiovascular Interventions, EarlyView.
Methodological framework among international observers to understand clinical decision‐making and interobserver agreement in TPVR planning. ABSTRACT Background Transcatheter pulmonary valve replacement (TPVR) requires selecting the optimal device type, size, and position. Variability in anatomical shape may affect procedural planning.
Camilo E. Pérez‐Cualtán, Jaime Cabrales, Francisco Garay, Carlos Eduardo Guerrero‐Chalela, Marcelo Rivarola, Juan P. Rozo, Juan Carlos Samayoa, Jenny Zablah, Javier Navarro‐Rueda, Juan C. Briceño Triana, Luis Felipe Giraldo   +10 more
wiley   +1 more source

Microsurgical clipping of unruptured middle cerebral artery bifurcation aneurysms: incidence of and risk factors for procedure-related complications.

, 2015
OBJECTIVE: To report our experiences in microsurgical clipping of unruptured middle cerebral artery (MCA) bifurcation aneurysms and to evaluate the incidence of and risk factors for procedure-related complications.
Hong, CK, Shin, YS, Lim, YC, Chung, J, Kim, YB, Joo, JY, Shim, YS   +6 more
core   +2 more sources