Abstract: Concussion is a type of mild traumatic brain injury, is common, and occurs both in sport and as a result of falls or accidents. Concussion has become an increasingly recognized public health concern, largely driven by prominent media coverage of athletes who have sustained concussion. Although much has been written about this condition, we still do not understand its natural history, and we are only now beginning to recognize that concussion often manifests in different clinical domains. These may require targeted treatment in and of themselves; otherwise, persistent postconcussive symptoms may develop. Although most individuals who sustain a concussion recover, and although concussion is a treatable condition, it is important that concussion be managed early and comprehensively to avoid a more prolonged clinical trajectory. A relatively recent term often used in the setting of concussion is repetitive head impact exposure-a biomechanical force applied to the head that does not generate a clinical manifestation of concussion, but may result in structural brain changes. Although it is often assumed that repetitive head impact exposure leads to long-term neurological sequelae, the science to document this assumption is in its infancy. Repeated concussions may lead to depression or cognitive impairment later in life, and there is an emerging literature that repeated concussion and repetitive head impact exposure are associated with chronic traumatic encephalopathy or other neurodegenerative diseases. Currently there is no known causal connection between concussion, repetitive head impact exposure, and neurodegeneration, although this research is also still in its infancy. What is clear is that (a) concussion prevention and safety should be paramount in sport and in society, (b) concussion management should begin immediately and should include clinical domains, and (c) research on concussion and repetitive head impact exposure must continue to move forward. Keywords: concussion; mild traumatic brain injury; clinical domains; repetitive head impact exposure; chronic traumatic encephalopathy; safety"--
A pathophysiologic model for Stage 4 DLK that challenges current dogma in refractive surgery and simultaneously refutes four (4) broadly held paradigms in Ophthalmology including: - The etiology and pathophysiology of DLK - The etiology and pathophysiology of CTK - The mechanism that defines control of interstitial fluid pressures in the cornea - The primary etiology and control of corneal biomechanics. The profoundly revolutionary concepts articulated in this textbook redefine nearly everything we 'know' about control of fluid dynamics and the biomechanical forces that shape in the cornea. This is particularly true with respect to understanding how and why the cornea responds to laser refractive surgery, collagen crosslinking and femtosecond laser photodisruption and the etiology of disorders such as keratoconus.
How might the entire citizenry of a country make the decisions that affect them? Carson and Martin provide the first accessible and comprehensive overview of random selection as a possible process for transforming our modern political systems. Building on the theoretical work of the likes of John Burnheim and Fred Emery and drawing on their own work with social action groups, they outline a set of methods that go beyond the mere tapping of community opinion to reveal not only preferences but a more active role in creating the community. Random selection, as Carson and Martin show, has been used in community participation in short-term decision making and long-term planning. It can be a powerful tool in the development of local, federal, and international policy. An important and innovative look at government decision making, this will be of primary interest to scholars and researchers in political theory and electoral systems, as well as political activists and reformers.
The three-volume work Perceiving in Depth is a sequel to Binocular Vision and Stereopsis and to Seeing in Depth, both by Ian P. Howard and Brian J. Rogers. This work is much broader in scope than the previous books and includes mechanisms of depth perception by all senses, including aural, electrosensory organs, and the somatosensory system. Volume 1 reviews sensory coding, psychophysical and analytic procedures, and basic visual mechanisms. Volume 2 reviews stereoscopic vision. Volume 3 reviews all mechanisms of depth perception other than stereoscopic vision. The three volumes are extensively illustrated and referenced and provide the most detailed review of all aspects of perceiving the three-dimensional world.Volume 1 starts with a review of the history of visual science from the ancient Greeks to the early 20th century with special attention devoted to the discovery of the principles of perspective and stereoscopic vision. The first chapter also contains an account of early visual display systems, such as panoramas and peepshows, and the development of stereoscopes and stereophotography. A chapter on the psychophysical and analytic procedures used in investigations of depth perception is followed by a chapter on sensory coding and the geometry of visual space. An account of the structure and physiology of the primate visual system proceeds from the eye through the LGN to the visual cortex and higher visual centers. This is followed by a review of the evolution of visual systems and of the development of the mammalian visual system in the embryonic and post-natal periods, with an emphasis on experience-dependent neural plasticity. An account of the development of perceptual functions, especially depth perception, is followed by a review of the effects of early visual deprivation during the critical period of neural plasticity on amblyopia and other defects in depth perception. Volume 1 ends with accounts of the accommodation mechanism of the human eye and vergence eye movements.
This book is a survey of knowledge about binocular vision, with an emphasis on its role in the perception of a three-dimensional world. The primary interest is biological vision. In each chapter, physiological, behavioral, and computational approaches are reviewed in some detail, discussed, and interrelated. The authors describe experiments required to answer specific questions and relates them to new terminologies and current theoretical schemes.
Abstract: Concussion is a type of mild traumatic brain injury, is common, and occurs both in sport and as a result of falls or accidents. Concussion has become an increasingly recognized public health concern, largely driven by prominent media coverage of athletes who have sustained concussion. Although much has been written about this condition, we still do not understand its natural history, and we are only now beginning to recognize that concussion often manifests in different clinical domains. These may require targeted treatment in and of themselves; otherwise, persistent postconcussive symptoms may develop. Although most individuals who sustain a concussion recover, and although concussion is a treatable condition, it is important that concussion be managed early and comprehensively to avoid a more prolonged clinical trajectory. A relatively recent term often used in the setting of concussion is repetitive head impact exposure-a biomechanical force applied to the head that does not generate a clinical manifestation of concussion, but may result in structural brain changes. Although it is often assumed that repetitive head impact exposure leads to long-term neurological sequelae, the science to document this assumption is in its infancy. Repeated concussions may lead to depression or cognitive impairment later in life, and there is an emerging literature that repeated concussion and repetitive head impact exposure are associated with chronic traumatic encephalopathy or other neurodegenerative diseases. Currently there is no known causal connection between concussion, repetitive head impact exposure, and neurodegeneration, although this research is also still in its infancy. What is clear is that (a) concussion prevention and safety should be paramount in sport and in society, (b) concussion management should begin immediately and should include clinical domains, and (c) research on concussion and repetitive head impact exposure must continue to move forward. Keywords: concussion; mild traumatic brain injury; clinical domains; repetitive head impact exposure; chronic traumatic encephalopathy; safety"--
Back Pain Understood: A Cutting-Edge Approach to Healing Your Back In our quick-fix society, we often search for easy medical fixes. We make a diagnosis, put it in a box, and provide a medication, manipulation or surgical intervention to treat the diagnosis. Sixty million Americans who suffer with chronic pain tell us that this approach does not work. Back pain is a major manifestation of chronic suffering, and effective treatment is based on understanding both the body and the mind. The science of medicine explores the mind-body interface. The art of medicine transforms this exploration into practical solutions. Back Pain Understood provides an easy-to-follow format that provides practical solutions for the healthcare practitioner and patient. Explore for yourself what Back Pain Understood can offer you: bull;An understanding of chronic pain bull;An understanding of the anatomy and function of the back bull;An understanding of the mind-body connection bull;An understanding of the many types of back pain presentations bull;An understanding of multi-disciplinary treatment options bull;Wonderful illustrations and photographs that complement the text bull;Numerous real-life patient stories of healing
The author, a champion discus thrower, discusses how he and other elite athletes have obtained and used performance-enhancing drugs, and the way in which officials have reacted. Describes the effect of these drugs on him and his performances and explains how athletes beat the drug tests. Also provides information about his international career, and the reasons behind his decision not to compete in the Sydney Olympic Games.
“We are not worth more, they are not worth less.” This is the mantra of S. Brian Willson and the theme that runs throughout his compelling psycho-historical memoir. Willson’s story begins in small-town, rural America, where he grew up as a “Commie-hating, baseball-loving Baptist,” moves through life-changing experiences in Viet Nam, Nicaragua and elsewhere, and culminates with his commitment to a localized, sustainable lifestyle. In telling his story, Willson provides numerous examples of the types of personal, risk-taking, nonviolent actions he and others have taken in attempts to educate and effect political change: tax refusal—which requires simplification of one’s lifestyle; fasting—done publicly in strategic political and/or therapeutic spiritual contexts; and obstruction tactics—strategically placing one’s body in the way of “business as usual.” It was such actions that thrust Brian Willson into the public eye in the mid-’80s, first as a participant in a high-profile, water-only “Veterans Fast for Life” against the Contra war being waged by his government in Nicaragua. Then, on a fateful day in September 1987, the world watched in horror as Willson was run over by a U.S. government munitions train during a nonviolent blocking action in which he expected to be removed from the tracks and arrested. Losing his legs only strengthened Willson’s identity with millions of unnamed victims of U.S. policy around the world. He provides details of his travels to countries in Latin America and the Middle East and bears witness to the harm done to poor people as well as to the environment by the steamroller of U.S. imperialism. These heart-rending accounts are offered side by side with inspirational stories of nonviolent struggle and the survival of resilient communities Willson’s expanding consciousness also uncovers injustices within his own country, including insights gained through his study and service within the U.S. criminal justice system and personal experiences addressing racial injustices. He discusses coming to terms with his identity as a Viet Nam veteran and the subsequent service he provides to others as director of a veterans outreach center in New England. He draws much inspiration from friends he encounters along the way as he finds himself continually drawn to the path leading to a simpler life that seeks to “do no harm.&rdquo Throughout his personal journey Willson struggles with the question, “Why was it so easy for me, a ’good’ man, to follow orders to travel 9,000 miles from home to participate in killing people who clearly were not a threat to me or any of my fellow citizens?” He eventually comes to the realization that the “American Way of Life” is AWOL from humanity, and that the only way to recover our humanity is by changing our consciousness, one individual at a time, while striving for collective cultural changes toward “less and local.” Thus, Willson offers up his personal story as a metaphorical map for anyone who feels the need to be liberated from the American Way of Life—a guidebook for anyone called by conscience to question continued obedience to vertical power structures while longing to reconnect with the human archetypes of cooperation, equity, mutual respect and empathy.
After serving in the Vietnam War, S. Brian Willson became a radical, nonviolent peace protester and pacifist, and this memoir details the drastic governmental and social change he has spent his life fighting for. Chronicling his personal struggle with a government he believes to be unjust, Willson sheds light on the various incarnations of his protests of the U.S. government, including the refusal to pay taxes, public fasting, and, most famously, public obstruction. On September 1, 1987, Willson was run over by a U.S. government munitions train during a nonviolent blocking action in which he expected to be removed from the tracks. Providing a full look into the tragic event, Willson, who lost his legs in the incident, discusses how the subsequent publicity propelled his cause toward the national consciousness. Now, 23 years later, Willson tells his story of social injustice, nonviolent struggle, and the so-called American way of life.
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