We seek to change the conversation about brain death by highlighting the distinction between brain death as a biological concept versus brain death as a legal status. The fact that brain death does not cohere with any biologically plausible definition of death has been known for decades. Nevertheless, this fact has not threatened the acceptance of brain death as a legal status that permits individuals to be treated as if they are dead. The similarities between “legally dead” and “legally blind” (...) demonstrate how we may legitimately choose bright-line legal definitions that do not cohere with biological reality. Not only does this distinction bring conceptual coherence to the conversation about brain death, but it has practical implications as well. Once brain death is recognized as a social construction not grounded in biological reality, we create the possibility of changing the social construction in ways that may better serve both organ donors and recipients alike. (shrink)

Conventional medical ethics and the law draw a bright line distinguishing the permitted practice of withdrawing life-sustaining treatment from the forbidden practice of active euthanasia by means of a lethal injection. When clinicians justifiably withdraw life-sustaining treatment, they allow patients to die but do not cause, intend, or have moral responsibility for, the patient's death. In contrast, physicians unjustifiably kill patients whenever they intentionally administer a lethal dose of medication. We argue that the differential moral assessment of these two practices (...) is based on a series of moral fictions – motivated false beliefs that erroneously characterize withdrawing life-sustaining treatment in order to bring accepted end-of-life practices in line with the prevailing moral norm that doctors must never kill patients. When these moral fictions are exposed, it becomes apparent that conventional medical ethics relating to end-of-life decisions is radically mistaken. (shrink)

Controversies about the diagnosis and meaning of brain death have existed as long as the concept itself. Here we review the historical development of brain death, and then evaluate the various attempts to justify the claim that patients who are diagnosed as brain dead can be considered dead for all legal and social purposes, and especially with regard to procuring their vital organs for transplantation. While we agree with most commentators that death should be defined as the loss of integration (...) of the functioning of the organism as a whole, we conclude that patients diagnosed as brain dead have not, in fact, lost this integrated functioning. We close with reflections on the implications of this conclusion generally and particularly with regard to organ transplantation, and briefly make reference to alternative approaches to justifying the procurement of transplantable organs that do not depend upon a flawed approach to the diagnosis of death. (shrink)

The American Journal of Bioethics, Volume 12, Issue 6, Page 10-11, June 2012.

Accepted medical practice already violates the dead donor rule. Explicitly jettisoning the rule—allowing vital organs to be extracted, under certain conditions, from living patients—is a radical change only at the conceptual level. But it would expand the pools of eligible organ donors.

Drawing on a recent case report of a pregnant, brain‐dead woman who gave birth to a healthy child after over seven months of intensive care treatment, this essay rejects the established doctrine in medicine that brain death constitutes the biological death of the human being. The essay describes three policy options with respect to determination of death and vital organ transplantation in the case of patients who are irreversibly comatose but remain biologically alive.

This book challenges fundamental doctrines of established medical ethics. It is argued that the routine practice of stopping life support technology causes the death of patients and that donors of vital organs (hearts, liver, lungs, and both kidneys) are not really dead at the time that their organs are removed for life-saving transplantation. Although these practices are ethically legitimate, they are not compatible with traditional medical ethics: they conflict with the norms that doctors must not intentionally cause the death of (...) their patients and that vital organs can be obtained only from dead donors. The aim of this book is to undertake an ethical examination that aims to honestly face the reality of medical practices at the end of life. This involves exposing the misconception that stopping life support merely allows patients to die from their medical conditions, that there is an ethical bright line separating withdrawal of life support from active euthanasia, and that determination of death of hospitalized patients prior to vital organ donation is consistent with the established biological conception of death. A novel ethical justification is required for procuring vital organs from still-living donors. It is contended that in the context of plans to withdraw life support, donors of vital organs are not harmed or wronged by organ procurement prior to death, provided that valid consent is obtained for stopping treatment and organ donation. In view of serious practical difficulties in facing the truth regarding organ donation, an alternative pragmatic account is developed for justifying current practices that relies on the concept of transparent legal fictions. In sum, it is the thesis of this book that to preserve the legitimacy of end-of-life practices, we need to reconstruct medical ethics. (shrink)

Bioethics is a hybrid discipline. As a theoretical enterprise it stands for untrammeled inquiry and argument. Yet it aims to influence medical practice and policy. In this article we explore tensions between these two dimensions of bioethics and examine the merits and perils of a “Socratic” approach to bioethics that challenges “the conventional wisdom.”.

In lieu of an abstract, here is a brief excerpt of the content:The Incoherence of Determining Death by Neurological Criteria: A Commentary on Controversies in the Determination of Death, A White Paper by the President’s Council on Bioethics*Franklin G. Miller** (bio) and Robert D. Truog (bio)Traditionally the cessation of breathing and heart beat has marked the passage from life to death. Shortly after death was determined, the body became a cold corpse, suitable for burial or cremation. Two technological (...) changes in the second half of the twentieth century prompted calls for a new, or at least expanded, definition of death: the development of intensive care medicine, especially the use of mechanical ventilators, and the advent of successful transplantation of vital organs. Patients with profound neurological damage, leaving them incapable of breathing on their own and in an irreversible coma, could be maintained for some period of time with the aid of mechanical ventilation. The situation of these patients posed two ethical questions. Is it appropriate to stop life-sustaining treatment? If so, is it acceptable to retrieve vital organs for transplantation to save the lives of others before stopping treatment?In 1968, the Ad Hoc Committee of the Harvard Medical School to Examine the Definition of Brain Death proposed that death could be determined on the basis of neurological criteria, thus providing a positive answer to these two questions (Ad Hoc Committee 1968). According to the position of this committee, patients diagnosed with the cessation of brain function are dead, despite the fact that they breathe and circulate blood with the aid of mechanical ventilation. [End Page 185] Because they are dead, it is appropriate, indeed imperative, to stop mechanical ventilation. And because they are dead, it becomes ethical to procure vital organs for transplantation before stopping what otherwise would be life-sustaining treatment. Remarkably, this innovative neurological determination of death became, with little debate or controversy, the established position in medical ethics and the law throughout the United States.The Harvard Committee articulated the diagnosis of “irreversible coma,” but merely asserted that this condition constituted death. No explanatory rationale was provided. It fell to the President’s Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research to provide an authoritative rationale in its 1981 report, Defining Death. The second paragraph of the report set the stage as follows: “The question addressed here is not inherently difficult or complicated. Simply, it is whether the law ought to recognize new means for establishing that the death of a human being has occurred” (President’s Commission 1981, p. 3). The Commission claimed that “death is a unitary phenomenon” (p. 7) and that the determination of death by neurological criteria, in terms of the absence of all brain function, is consistent with the traditional conception of death as the cessation of vital functioning of the organism as a whole. The key issue is the integrative functioning of the human organism, which ceases to exist, according to the Commission, when the whole brain, including higher cortical areas and the brain stem, fails to function. Although “brain-dead” patients do not appear to be dead—i.e., the reality of their death is “masked” by the activity of mechanical ventilation—the patient’s body has irreversibly lost all capacity for integrative functioning. In the words of the Commission: “When artificial means of support mask this loss of integration as measured by the old methods [cessation of respiration and heart beat], brain-oriented criteria and tests provide a new window on the same phenomenon” (p. 33). The President’s Commission was instrumental in developing and establishing “The Uniform Definition of Death Act”: “An individual who has sustained either (1) irreversible cessation of circulatory and respiratory functions, or (2) irreversible cessation of all functions of the entire brain, including the brain stem, is dead” (p. 2).Although the question posed by the President’s Commission was easy to articulate, the answer, over time, has proved complicated and controversial. The coherence and cogency of determining death by neurological criteria has been challenged. Various experts have demonstrated that “brain-dead” patients maintained on mechanical ventilation display a range of vital, integrative, functioning, which conflicts with the judgment that they are dead (Truog and... (shrink)

The EEG and MEG studies cited in the target article found reduced gamma band power following pseudowords in comparison with words. Pulvermüller interprets this power difference in terms of reverberating lexical cell assemblies. An alternative interpretation in terms of latency jitter in the gamma band following pseudowords is proposed that does not appeal to lexical cell assemblies.

A starting point for this paper is that there is at least one concept of probability, call it epistemic probability, which can be identified with belief or some sort of idealised belief. If this identification is to be of any significance, then it needs to be shown that epistemic probability is a ‘true’ probability concept and is subject to those restrictions and requirements which relate and govern probabilities, which we call the probability calculus.The most rehearsed argument to establish the probability (...) calculus for epistemic probabilities is the Dutch Book Argument. There are two intuitions behind the DBA. The first is that if we can find some fine-grained behavioural measure of epistemic probability, then we may be able to show that epistemic probabilities obey the probability calculus by showing that the behaviour is of a kind which is, as a matter of necessity, subject to certain limitations and restrictions. (shrink)

Human life and death should be defined biologically. It is important not to conflate the definition of death with the criteria for when it has occurred. What is distinctively "human" from a scientific or normative perspective has nothing to do with what makes humans alive or dead. We are biological organisms, despite the fact that what is meaningful about human life is not defined in biological terms. Consequently, as in the rest of the realm of living beings, human beings die (...) when they no longer function biologically as organisms. In contrast, a determination of exactly when death has occurred, required to serve various social purposes, combines social and normative considerations with biological facts. (shrink)

ABSTRACTConventional medical ethics and the law draw a bright line distinguishing the permitted practice of withdrawing life‐sustaining treatment from the forbidden practice of active euthanasia by means of a lethal injection. When clinicians justifiably withdraw life‐sustaining treatment, they allow patients to die but do not cause, intend, or have moral responsibility for, the patient's death. In contrast, physicians unjustifiably kill patients whenever they intentionally administer a lethal dose of medication. We argue that the differential moral assessment of these two practices (...) is based on a series of moral fictions – motivated false beliefs that erroneously characterize withdrawing life‐sustaining treatment in order to bring accepted end‐of‐life practices in line with the prevailing moral norm that doctors must never kill patients. When these moral fictions are exposed, it becomes apparent that conventional medical ethics relating to end‐of‐life decisions is radically mistaken. (shrink)

Some metabolic pathways are nearly ubiquitous among organisms: the genes encoding the enzymes for such pathways must therefore be ancient and essential. De novo pyrimidine biosynthesis is an example of one such metabolic pathway. In animals a single protein called CADAbbreviations: CAD, trifunctional protein catalyzing the first three steps of de novo pyrimidine biosynthesis in higher eukaryotes; CPS, carbamyl phosphate synthetase domain; CPSase, carbamyl phosphate synthetase activity; ATC, aspartate transcarbamylase domain; ATCase, aspartate transcarbamylase activity; DHO, dihydroorotase domain; DHOase, dihydroorotase activity; (...) GLN, glutaminase subdomain or subunit of carbamyl phosphate synthetase, GL Nase, glutaminase activity; SYN, synthetase subdomain or subunit of carbamyl phosphate synthetase; SYNase, synthetase activity. carries the first three steps of this pathway. The same three enzymes in prokaryotes are associated with separate proteins. The CAD gene appears to have evolved through a process of gene duplication and DNA rearrangement, leading to an in‐frame gene fusion encoding a chimeric protein. A driving force for the creation of eukaryotic genes encoding multienzymatic proteins such as CAD may be the advantage of coordinate expression of enzymes catalyzing steps in a biosynthetic pathway. The analogous structure in bacteria is the operon. Differences in the translational mechanisms of eukaryotes and prokaryotes may have dictated the different strategies used by organisms to evolve coordinately regulated genes. (shrink)

According to many commentators, Davidson’s earlier work on philosophy of action and truth-theoretic semantics is the basis for his reputation, and his later forays into broader metaphysical and epistemological issues, and eventually into what became known as the triangulation argument, are much less successful. This book by two of his former students aims to change that perception. In Part One, Verheggen begins by providing an explanation and defense of the triangulation argument, then explores its implications for questions concerning semantic (...) normativity and reductionism, the social character of language and thought, and skepticism about the external world. In Part Two, Myers considers what the argument can tell us about reasons for action, and whether it can overcome skeptical worries based on claims about the nature of motivation, the sources of normativity and the demands of morality. The book reveals Davidson’s later writings to be full of innovative and important ideas that deserve much more attention than they are currently receiving. (shrink)