Cardiovascular control during whole body exercise

It has been considered whether during whole body exercise the increase in cardiac output is large enough to support skeletal muscle blood flow. This review addresses four lines of evidence for a flow limitation to skeletal muscles during whole body exercise. First, even though during exercise the blood flow achieved by the arms is lower than that achieved by the legs (~160 vs. ~385 ml/min/100 g) the muscle mass that can be perfused with such flow is limited by the capacity to increase cardiac output (42 l/min, highest recorded value). Secondly, activation of the exercise pressor reflex during fatiguing work with one muscle group limits flow to other muscle groups. Another line of evidence comes from evaluation of regional blood flow during exercise where there is a discrepancy between flow to a muscle group when it is working exclusively and when it works together with other muscles. Finally, regulation of peripheral resistance by sympathetic vasoconstriction in active muscles by the arterial baroreflex is critical for blood pressure regulation during exercise. Together, these findings indicate that during whole body exercise muscle blood flow is subordinate to the control of blood pressure.</p

Representation, Objectivity and the Ethics of Images

This volume features more than 25 papers that were presented at the 2014 Conference of the International Association for the Study of Controversies, IASC, held at the University of Salento, Lecce, Italy. It looks at conflict and conflict resolution from diverse perspectives, including philosophy, psychology, law, and history. Coverage explores the paradox of conflict and examines how discord, whether large or small, international or internal, can be both a source of chaos as well as a foundation for unity, a limitation of potential as well as an entryway to a greater depth of living. Inside, readers will discover thought-provoking answers to such questions as: What are the conditions to ensure that a conflict can be converted into cooperation? If the conflict between interests can be solved by a compromise, what happens when a conflict involves non-negotiable values​​? In the management of a conflict, what role is played by argumentation? What are the latest perspectives in conflict management? How does the theory of controversies allows us to recognize and resolve conflicts? By the end of the book, readers will have a better understanding of how conflict can be transcended and how it's possible to redefine the conflicting situation so that what seemed incompatible and locked may, in fact, open a new perspective