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There has been considerable optimism recently, among philosophers and neuroscientists, concerning the prospect for major discoveries about the. There has been considerable optimism recently, among philosophers and neuroscientists, concerning the prospect for major discoveries about. Nagel – Brain Bisection and the Unity of Consciousness Notes. Suggestion that the personal “mentalist” idea of a human being will be.

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We must, it seems, also be jointly conscious of the various elements to have unified consciousness of an object. However, this sense could be wrong. There are many more data. One of the most interesting ways to study psychological phenomena is to see what happens when they take an abnormal form or break down. He calls this the switch model Not only are most versions of EP built on some notion of co-consciousness; most notions of co-consciousness assume EP and are incompatible with NEP.

As James put it, contrasting the unified consciousness of the whole alphabet with the several states involved in consciousness of each letter taken singly, It is safer … to treat the consciousness of the alphabet as a twenty-seventh fact, the substitute and not the sum of the twenty-six simpler consciousnesses.

Earlier we mentioned Gestalt unity.

Implications of the Split Brain: A Consideration of Nagel – Inquiries Journal

Astore It is not often that one questions the nature of space, in fact, most people understand extension as independent of their mind as well as the objects that appear in their surrounding world. Unified consciousness of contents appears to be central to our kind of consciousness.

In thought insertion, the victim does not appear to himself to be either subject or agent of some of the experiences of which he is in fact the subject and agent Mylopoulos One could not answer questions such as, Is the car the same colour as the WordPerfect icon? Others who centre their analysis on the notion include Parfit and Hurley Suppose that one sees a stick immersed in water as being bent but feels it to be straight or knows that this is an illusion. Theorists who accept EP usually just assert or even assume it we saw some examples of this in Section 7.


Having been severed, the two bracelets of the handcuffs continue to be capable of handcuff-like things — they adjust to the size of the object they encircle, they lock at the smallest position they reach, they can be unlocked with the right key, etc. We would have unified consciousness of fewer of our conscious states than has been thought.

Without it, one could not hear any sequence as a sequence or so much as read a simple sentence. Hurley examines this question in detail, as does Bayne Unlike commissurotomy cases, it is not brin case that a conscious experience of the second item exists within another unified consciousness. Think of a concert pianist performing a complicated work.

Implications of the Split Brain: A Consideration of Nagel

Yet he can still invoke th. If the mind is not a fundamentally unified entity, why is it so difficult for the experiment to segregate the hemispheres when the corpus callosum has already been eliminated?

Brain bisection cases are putative examples of the number of centres of consciousness not lining up with the number of brains and bodies from one direction. In one group, however drastic the change in unified consciousness, unified consciousness remains in a largely complete form.

After giving some helpful background information on physiology and the techniques of experimenters, Nagel describes what happens to patients whose corpus callosum connecting the two hemispheres has been surgically severed, and who received segregated inputs to the two hemispheres.

Nor can he tell whether two lines meet at an angle, if the joint is in the middle. The main difference is that the breach seems to be at a time in brain bisection cases, but can be either across time or at a time in DID cases.


As we saw in Section 2. Now suppose that we flash the word TAXABLE on a screen in front of a brain bisected patient in such a way that the letters TAX hit the left side of the retina, the letters ABLE the right side, and we put measures in place to ensure that the information hitting each half of the retina goes only to one lobe and is not fed to the other.

Elizabeth Schechter – – European Journal of Philosophy 21 2: It has not been destroyed or even damaged. Indeed, it is not easy to specify any relation among unified contents or acts of experiencing beyond their being unified that is required for them to be unified.

This distinction seems to shed some interesting light on the three phenomena. Suppose that one is listening to a melody. Nothing, I submit … What is it like to be a brace of oxen?

The Unity of Consciousness (Stanford Encyclopedia of Philosophy)

Having lost the primary means of communication between the hemispheres, it adapts and finds new ways to relay information between them, making use of a wide range of cues to compensate for the change in the physical system. When separated by more than a few metres, they complained bitterly, each body reporting that it felt like a part of itself was being ripped out.

In fact, it would seem that there can be incompatibilities even within a perceptual modality. Blackmoreespecially ch. Consciousness is a thought-provoking phenomenon.