Response to human head transplant proposal and pertinent personal identity questions.

A surgical head-transplant technique, HEAVEN, promises to offer significantly improved quality of life for quadriplegics and others whose minds are functional, but whose bodies require artificial support to continue living. HEAVEN putatively actualizes a thought-experiment long debated by philosophers concerning the definition of personhood and criterion of personal identity through time and change. HEAVEN’s advocates presume to preserve the identity of the person whose head is transplanted onto another’s living body, leaving one’s previous body behind as one would their corpse. (...) Various classical and contemporary theories of personhood and personal identity would support this presumption, while others would contest it as providing an accurate or complete view of what is essential for a human person to persist through this procedure. This paper brings such theories to bear in analyzing whether HEAVEN can indeed deliver on its promise of complete ontological survival for the person whose head is transplanted. (shrink)

Plans to attempt what has been called a head transplant, a body transplant, and a head-to-body transplant in human beings raise numerous ethical, social, and legal questions, including the circumstances, if any, under which it would be ethically permissible to attempt whole-body transplantation (WBT) in human beings, the possible effect of WBT on family relationships, and how families should shape WBT decisions. Our assessment of many of these questions depends partially on how we respond to sometimes centuries-old philosophical thought experiments (...) about personal identity. As with so much in bioethics, it is impossible to escape, or at least inadvisable to try to bypass, the relevant foundational philosophical concerns. (shrink)

Brain transplants have long been no more than the subject of science fiction and engaging thought experiments. That is no longer true. Neuroscientists have announced their intention to transplant the head of a volunteer onto a donated body. Response has been decidedly mixed. How should we think about the moral permissibility of head transplants? Is it a life-saving/life-enhancing opportunity that appropriately expands the boundaries of medical practice? Or, is it a bioethical morass that ought not to be attempted? For the (...) purposes of this paper, I set aside questions regarding the surgical operation’s technological plausibility so as to focus on very basic questions regarding personal identity and the morality of head transplantation. The analysis begins with an exploration of the embodiment of persons. It considers whether persons can be conceptually distinguished from all parts of their body, even if they cannot be physically separated from some parts without loss of personhood. It argues that in most cases replacing body parts with reasonably similar parts will not destroy the conditions for sustaining personhood. However, as I explore, the phenomenology of personhood is such that some physical changes may prove to be too significant to maintain personal identity successfully over time. Given such complexity and the significance of the costs involved, the moral permissibility of head transplantation likely depends on recognizing that persons may give permission to collaborate in common activities, including projects with which others deeply disagree, provided that they only utilize the services and resources of free and consenting others. (shrink)

The primary intention of Ren and Canavero's article (2017) is to respond to various criticisms raised by their proposal of the head anastomosis venture (HEAVEN) procedure. Before we launch a deeper analysis of Ren and Canavero's article, I would like to draw attention to a sentence, “Unfortunately, humility is not a part of medical lore,” where they refer to the arrogance and unsuccessfulness of medical science to recognize the importance and breakthrough of the HEAVEN procedure. Interestingly, with this repeated citation, (...) they acknowledge a familiar criticism of medical lore, so that we would expect that they provide a good example of the appreciation of humility in their present article. (shrink)

Canavero and Ren (2017) suggest that both public and bioethical objections to head/body transplantation will subside after patient outcomes prove successful in an analogous way to how similar objec...

In this article, we consider three metaphysical theories of personal identity: the soul theory, the body theory, and the psychological theory. Clinical cases are discussed as they present conceptual problems for each of these theories. For the soul theory, the case of Phineas Gage, and cases of pedophilic behavior due to a brain tumor are discussed. For the body theory, hypothetical cases of cephalosomatic anastomosis and actual cases of dicephalic parapagus and craniopagus parasiticus are discussed. For the psychological theory, cases (...) of delusions and memory impairments are discussed. After a discussion of all these cases, we conclude that it is very difficult to unequivocally favor one of these theories, yet we argue that this discussion must be based not on abstract armchair speculation, but rather, consideration of real clinical cases. (shrink)

Media carry the message of the scientific community into the wider world, though sometimes it would be more appropriate to say: of a certain scientific group. For the field of bioethics, this is particularly true. From films such as Gattaca to TV series like Black Mirror, the relationship between science and science fiction appears evidently bidirectional. This relationship is not new of course, but this paper discusses quasi-science-fictional experiments such as that of Sergio Canavero and the recent TV series Altered (...) Carbon through the lenses of the philosophical background they both rely on: immortality is achievable—and it should be sought with vehemence. At least by the rich. (shrink)