Nanotechnology, the Brain, and Personal Identity

Author(s):  
Stephanie Naufel
Keyword(s):  
Author(s):  
Vadim V. Vasilyev ◽  

In this paper I discuss some aspects of the problem of carriers of human mind and person. The main emphasis is placed on the origin of our idea of the identi­cal self in the stream of perceptions, the need for a physical carrier of our self and person, and on possibility of replacing the biological carriers of self and per­son with artificial analogues. I argue that the idea of identical self is constructed by reflection on memories, that its truth is guaranteed by continuous stream of perceptions kept in memories, and that the stream of perceptions presupposes the presence of a normally functioning brain, which can be considered as a car­rier of our mind and person. Therefore, personal identity turns out to be depen­dent on the identity of the brain in time. An attempt to copy the structures of mind and person onto other possible carriers can thus only lead to creation of duplicates of the original person, but not to the continuation of its existence on another carrier. I argue that the gradual replacement of their components with artificial analogues is a more promising way of transforming the biological carri­ers of human person. To access the possible consequences of such a replacement I analyze arguments of John Searle and David Chalmers, designed to show, re­spectively, the disappearance of consciousness and person with such a replace­ment and, on the contrary, their preservation in a previous state. I explain why Searle’s arguments are unconvincing, and demonstrate that Chalmers’ arguments are based on a hidden premise, the confirmation of which is possible in the con­text of dubious theories of mind-body identity, epiphenomenalism or panpsy­chism only. I conclude that in the current situation it is impossible to predict which consequences for our person would follow such a replacement.


2006 ◽  
Vol 34 (1) ◽  
pp. 249-268
Author(s):  
Linda M. Austin

THE IDEA OF THE SELFin its various constructions–political, economic, psychological–has always been shadowed by an English tradition of skepticism about the persistence of a conscious and stable identity. Voiced most disconcertingly by David Hume in his section, “Of personal identity” fromA Treatise of Human Nature(1739–40; I.iv.vi), this attitude was significantly advanced during the second half of the nineteenth century by a group of physiological psychologists who argued for the corporeal basis of mental functions, including memory. Henry Maudsley and George Henry Lewes, among others, challenged the metaphysical notion of a mind and drew instead from controversial and often suppressed theories of neuroscience to describe the physiological operation of memory. These theories, which located impressions and sensations in the brain or spinal chord, produced a form of identity that could endure alterations of consciousness. They offered, in addition, a new understanding of an adult's physical connection to the personal past.


This chapter turns to philosophers and artists, seeking their views on the dilemma of consciousness and the self, as well as the related mind/body problem. Does consciousness – and personal experience – arise from the neurological functions of the brain (and if so, how), or is it but a shard of the flow of universal consciousness – and if so, is the mind only a channel of energy and should we forget about our cognitive functions, or train to use them in a different way? What does it mean to have a strong sense of personal identity – where does the ‘true self' lie? Having learnt from neuroscientists and most psychologists that our self seems to exceed the scope and depth of both body and mind, we hope that philosophy and art might guide us towards this ‘other' realm where our sense of identity emerges from.


2018 ◽  
Vol 66 (1) ◽  
pp. 48-61 ◽  
Author(s):  
Thomas Fuchs

Abstract Theories of personal identity in the tradition of John Locke and Derek Parfit emphasize the importance of psychological continuity and the abilities to think, to remember and to make rational choices as a basic criterion for personhood. These concepts, however, are situated within a dualistic framework, in which the body is regarded as a mere vehicle of the person, or a carrier of the brain as the organ of mental faculties. Based on the phenomenology of embodiment, this paper elaborates a different approach to personal identity. In this perspective, selfhood is primarily constituted by pre-reflective self-awareness and the body memory of an individual, which consists in the embodiment and enactment of familiar habits, practices and preferences. As can be shown, this understanding of personhood still applies to dementia patients even in the later stages of the disease.


Perichoresis ◽  
2017 ◽  
Vol 15 (2) ◽  
pp. 3-23
Author(s):  
Dmytro Sepetyi

AbstractThis paper re-evaluates Derek Parfit’s attack on the commonly held view that personal identity is necessarily determinate and that it is what matters. In the first part we first argue against the Humean view of personal identity; secondly, we classify the remaining alternatives into three kinds: the body theory and the brain theory, the quasi-Humean theory, and the soul theory, and thirdly we deploy Parfit’s arguments and related considerations to the point that none of the materialistic alternatives is consistent with the commonly held view. This leaves us with the alternative: either we accept the radical and highly implausible materialistic view Parfit calls ‘Reductionism’, or we accept the view that we are nonphysical indivisible entities—Cartesian egos, or souls. The second part of the paper discusses Parfit’s objections against the Cartesian view: that there is no reason to believe in the existence of such nonphysical entities; that if such entities exist, there is no evidence that they are enduring (to span a human life); that even if they exist and are enduring, they are irrelevant for the psychological profile and temporal continuity of a person; that experiments with ‘brain-splitted’ patients provide strong evidence against the Cartesian view. We argue that these objections are in part mistaken, and that the remaining (sound) part is not strong enough to make the Cartesian view less plausible than Reductionism.


2021 ◽  
pp. 196-216
Author(s):  
Thomas Fuchs

Theories of personal identity in the tradition of John Locke emphasize the importance of psychological continuity and the abilities to think, to remember and to make rational choices as basic criteria for personhood. As a consequence, persons with severe dementia are threatened to lose the status of persons. Such concepts, however, are situated within a dualistic framework, in which the body is regarded as a mere vehicle of the brain as the organ of mental faculties. The chapter elaborates a different approach to personal identity: according to this, selfhood is primarily constituted by pre-reflective self-awareness and the body memory. Dementia is then characterized as a loss of reflexivity and meta-perspective, which is contrasted with the preservation of individual forms of body memory even in the later stages of the illness. The ethical consequences of such an embodied approach to dementia are outlined.


Author(s):  
Davor Pećnjak

One aspect of the problem of personal identity is considered in this article. In the introduction, the main frame of die problem is stated. After the exposition of the logically possible case of (whole) brain transplantation and the exposition of psychological criterion of personal identity, we introduce the problem of neuron exchange, one by one. Neurons are pulled out from one brain of a certain person, one by one, and they are implemented into the another personYs brain. At the end of this operation, all the neurons which were constitutive of the brain of the person A are assembled again in the head of the person B. The question is who is the person who survives and retains its personal identity? Contrary to John Robinson, I argue that the person who survives and retains identity is the person whose brain received the neurons and not the person from whom the neurons were pulled out. The main reason is the very way in which the neuron change took place.


Diametros ◽  
2021 ◽  
pp. 1-28
Author(s):  
Przemysław Zawadzki

Deep Brain Stimulation (DBS) is an invasive therapeutic method involving the implantation of electrodes and the electrical stimulation of specific areas of the brain to modulate their activity. DBS brings therapeutic benefits, but can also have adverse side effects. Recently, neuroethicists have recognized that DBS poses a threat to the very fabric of human existence, namely, to the selves of patients. This article provides a review of the neuroethical literature examining this issue, and identifies the crucial dimensions related to the self which DBS may endanger—personal identity, authenticity, and autonomy. The most influential theories accounting for these dimensions are analyzed herein, and it is argued that most of these theories require further refinement. This paper also demonstrates the interrelation between personal identity, authenticity, and autonomy, and concludes that one can only fully understand the impact of DBS on the self when all of these factors are taken into account.


2020 ◽  
Vol 23 (4) ◽  
pp. 665-676
Author(s):  
Thomas Fuchs

Abstract Theories of personal identity in the tradition of John Locke and Derek Parfit emphasize the importance of psychological continuity and the abilities to think, to remember and to make rational choices as a basic criterion for personhood. As a consequence, persons with severe dementia are threatened to lose the status of persons. Such concepts, however, are situated within a dualistic framework, in which the body is regarded as a mere vehicle of the person, or a carrier of the brain as the organ of mental faculties. Based on the phenomenology of embodiment, this paper elaborates a different approach to personal identity in dementia. In this perspective, selfhood is primarily constituted by pre-reflective self-awareness and the body memory of an individual, which consists in the embodiment and enactment of familiar habits, practices and preferences. After describing the different types of body memory, the paper develops a phenomenology of dementia as a loss of reflexivity and meta-perspective. This is contrasted with the preservation of individual forms of body memory even in the later stages of the illness. The ethical consequences of an embodied approach to dementia are outlined. A final look is given to narrativistic and constructionist concepts of the self in dementia.


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