Michael S. Gazzaniga Quotes

I am not suggesting that single cells are conscious. I am suggesting that they may have some type of processing that is necessary or similar to the processing that results in conscious experience.

some types of neurons may be found only in specific species.

Possessing a theory of mind means that an individual ascribes mental states, such as purpose, intention, knowledge, beliefs, doubts, pretending, liking, and so forth, to himself and to others.

What if conscious experience is managed by each module? Lose a module to injury or stroke, and the consciousness that accompanies that module is gone, too. Remember: patients with hemi-neglect aren’t conscious of one-half of space because the module that processes that information is no longer working. Or, if the modules responsible for locating oneself in space are not being integrated properly, conscious experience is deeply affected, and one ends up with the feeling that someone else is there just over your shoulder. Or, take people with Urbach-Wiethe disease, which leads to deterioration of the amygdalae: they no longer experience the emotion of fear.

When you hear a good joke, this is the system that kicks in and produces the giggly face.

There were those, such as Karl Lashley, mentioned earlier, who thought that the corpus callosum was merely a structural element that supported the two hemispheres.

Hence at any moment only part of the visual elements of a scene is available for conscious perception.

Baruch Spinoza, who said, “There is no mind absolute or free will, but the mind is determined for willing this or that by a cause which is determined in its turn by another cause, and this one again by another, and so on to infinity.

We don't learn to talk, as most think. We start to talk when our brain is good and ready to say something.

Spontaneous smiles are different. They utilize a totally different neurologic hardware that is diffuse and arises mostly out of the subcortex and something called the extra-pyramidal system.

Mother Nature has figured out a way to get rid of the extra neurons through a process called “pruning.” With appropriate input from the environment, the unnecessary neurons die off, and an acceptable number connect the two structures at the end of the developmental period. But, of course, here comes the fragility. Frequently the pruning is overdone. Indeed, evidence has accumulated that developmental mistakes in pruning lead to autism11 and schizophrenia.12 “Robust yet fragile” is everywhere, and the concept is central to realizing how the brain is organized.

The tension felt in the modern world between those who look at the confluence of neuroscientific data, historical data, and other information illuminating our past and those who simply accept received wisdom as their guide in life is real and profound. Yet it may not be as divisive as one would think. It appears that all of us share the same moral networks and systems, and we all respond in similar ways to similar issues. The only thing different, then, is not our behavior but our theories about why we respond the way we do. It seems to me that understanding that our theories are the source of all our conflicts would go a long way in helping people with different belief systems to get along.

Pattee explains there is a basic and extremely important distinction between laws and rules in nature.11 Laws are inexorable, meaning they are unchangeable, inescapable, and inevitable. We can never alter or evade laws of nature. The laws of nature dictate that a car will stay in motion either until an equal and opposite force stops it or it runs out of energy. That is not something we can change. Laws are incorporeal, meaning they do not need embodiments or structures to execute them: there is not a physics policeman enforcing the car’s halt when it runs out of energy. Laws are also universal: they hold at all times in all places. The laws of motion apply whether you are in Scotland or in Spain. On the other hand, rules are arbitrary and can be changed. In the British Isles, the driving rule is to drive on the left side of the road. Continental Europe’s driving rule is to drive on the right side of the road. Rules are dependent on some sort of structure or constraint to execute them. In this case that structure is a police force that fines those who break the rules by driving on the wrong side. Rules are local, meaning that they can exist only when and where there are physical structures to enforce them. If you live out in the middle of the Australian outback, you are in charge. Drive on either side. There is no structure in place to restrain you! Rules are local and changeable and breakable. A rule-governed symbol is selected from a range of competitors for doing a better job constraining the function of the system it belongs to, leading to the production of a more successful phenotype. Selection is flexible; Newton’s laws are not. In their informational role, symbols aren’t dependent on the physical laws that govern energy, time, and rates of change. They follow none of Newton’s laws. They are lawless rule-followers! What this is telling us is that symbols are not locked to their meanings.

Amid great anticipation, Giacomo slowly lowered the electrode into the callosum. As is commonly done in neurophysiology, the recording system was hooked up to a loudspeaker so that the rat-tat-tat of the neurons firing could be heard. We were ready to hear the Morse code of the brain.
Then it happened. The electrode pierced the callosum. Instead of the rat-tat-tat we expected, the loudspeaker boomed with the excruciatingly clear voice of Ringo Starr singing, “We all live in a yellow submarine, a yellow submarine, a yellow submarine.” Giacomo looked up from the cat and calmly said, “Now that is what I call high-order information.” Some kind of electronic ground loop had been closed, and we were picking up the local radio station. We all laughed, though we knew this brain code thing was going to be a long haul.

A clearer picture of what is happening in the brain during non-REM sleep,14 during sleepwalking,15 and during confused arousals16 has been achieved through neuroimaging and EEG. It appears that the brain is half awake and half asleep: the cerebellum and brainstem are active, while the cerebrum and cerebral cortex have minimal activity. The pathways involved with control of complex motor behavior and emotion generation are buzzing, while those pathways projecting to the frontal lobe, involved in planning, attention, judgment, emotional face recognition, and emotional regulation are zoned out. Sleepwalkers don’t remember their escapades, nor can they be awakened by noise or shouts, because the parts of the cortex that contribute to sensory processing and the formation of new memories are snoozing, temporarily turned off, disconnected, and not contributing any input to the flow of consciousness.