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Vestibular Function and Anatomy

The vestibular system, defined as the peripheral vestibular motion detectors and related central nervous system structures, senses motion in space and converts that motion into information that the remainder of the central nervous system can use to generate appropriate motor reflexes or facilitate complex processes such as the coordination of head, eye, and trunk movements or updating one's perception of his or her orientation in the world. The vestibular system, like the auditory system, converts physical stimuli into neural signals, but the vestibular system detects angular and linear acceleration, rather than sound. The vestibular system is present in all vertebrates and many invertebrates. Yet, despite the importance of spatial orientation in all mobile animals, the vestibular system is largely underappreciated until a malfunction occurs, at which point patients present to a physician, often an otolaryngologist, for treatment and education. This chapter discusses the anatomy of...
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Blood Supply of the Heart

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Heart Structure and Blood Supply It seems odd that the tissues making up the heart must have their own separate blood supply. You might think that the torrent of blood rushing through the heart every minute would more than adequately meet the needs of the organ. The walls of the heart, however, consist of layers of specialized muscle. These walls are quite thick—the wall of the left ventricle is often over 1 inch thick. Since the lining of the heart is watertight, the blood cannot seep through the layers of muscle to provide the nourishment essential to these constantly working masses. Blood is carried through the muscle layers that form the heart wall by means of the two coronary arteries. These two small vessels branch off the aorta just after it leaves the heart and curl back across the surface of the chambers, sending twigs through the walls (Fig. 4-1). The coronary arteries are so named because of the supposed resemblance to a crown or “corona” of the little arteries as they...
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Pathophysiology of Disease An Introduction to Clinical Medicine, Sixth Edition (Lange Medical Books) (Paperback)

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download link : please click here Review "The book does an excellent job of integrating basic science concepts with clinical medicine. Each of the organ system chapters reviews the normal anatomy, physiology and histology, then follows with the pathophysiology, clinical findings, and pathology of the more commonly encountered disorders. Additionally there are chapters on genetic diseases, immune diseases and neoplasia which similarly link basic science principles with clinical disease entities. Each chapter contains periodic "checkpoint" questions which guide the reader to the most important concepts. Each chapter also ends with several case studies with questions and discussions, similar to those encountered on board examinations." Product Description A complete case-based review of the essentials of pathophysiology – covering all major organs and systems This trusted text introduces you to clinical medicine by reviewing the pathophysiologic basis of the signs and ...
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