Mind Matters Natural and Artificial Intelligence News and Analysis

TagRoger Sperry

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Models of two brain halves on black background

The Brain Can Be Split But the Mind Can’t

Neuroscientist Roger Sperry found that splitting the brain in half does not split consciousness in half. It just gives you a rather interesting, but very subtle set of perceptual disabilities

Neurosurgeon Michael Egnor did a recent podcast with Arjuna Das at Theology Unleashed, “where Eastern theology meets Western skepticism.” In this segment, they discuss the significance of the fact that there are aspects of the human mind that cannot be split into parts — as demonstrated by the work of Nobelist Roger Sperry (1913–1994). Here is a partial transcript and notes for the 57 minute mark to the 1 hour five minute mark: Michael Egnor: If one is to try to understand the mind in a coherent, consistent framework, one wants to have a metaphysical perspective that does the job, that makes sense. I think there are three different metaphysical perspectives that one could consider, materialist, idealist, and dualist… By…

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X-ray of the head and brain of a person

Bingecast: Michael Egnor on the Human Brain

In this Bingecast episode, Dr. Robert J. Marks and Dr. Michael Egnor explore the human brain and its relationship to the mind. Is the mind an emergent property of the brain? Is there neurological evidence for the soul? What have brain experiments taught us about free will and the human person? Can you still think in a coma? Show Notes…

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The War of Logic vs Creativity

Are You Left-Brained? Right-Brained? That’s Nice. Now Forget It.

The rise and fall of a really Cool myth about the brain

If you have a few minutes waiting in line, you can try various tests on the internet to help you “figure out the huge dilemma”: Are you left- or right-brained? Or, at least, “Which side of your brain is more dominant?” (in 30 seconds). Buzzfeed, more elaborately, offers a Triangle Test to reveal the dominant side. This stuff is fun (maybe). But should we take it seriously? No. Many of us have heard one version or another of the pop psych myth that the brain functions as two separate departments, logic (left) vs. creativity (right). The myth carries conversations and sells workshops, books and TV shows. In reality, the brain’s two hemispheres work together for most jobs, the degree of…

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Laboratory mice in the experiment test. Blue filter.

Has Neuroscience “Proved” That the Mind Is Just the Brain?

This is hardly the first time that bizarre claims have been made for minimal findings. In neuroscience, materialism is the answer only if you don’t understand the questions.

Last month, materialist neurologist Steven Novella made a rather astonishing claim in a post at his Neurologica blog: A recent open-access study of learning and decision-making in mice shows that the human mind is merely what the human brain does. That’s a lot for mice to prove. In the study, the mice were trained to choose holes from which food is provided. Their brain activity was measured as they learned and decided which holes were best. The research looks specifically at quick and intuitive decision-making vs. decision-making that is slower and involves analysis of the situation. The investigators found that analysis-based decisions in the mice involve brain activity in the anterior cingulate cortex, which is a region of the brain…

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split personality

Does Split-brain Surgery Show That We Have No Real Identity?

A prominent philosopher built his career arguing against the existence of personal identity

One of the most bizarre consequences of the modernist materialist conception of human beings is the notion that personal identity is not real or not continuous. This view is, of course, contrary in every way to the lived experience of each of us. Like everyone else, I am the same person I was as a child, and the same person I will be a moment before my death. I am me, and I am no other. Of course, at different times of my life I have had different memories, experiences, and perceptions, but it is the same I (the only I) that has them. This is so fundamental to reality that it seems beyond question. It is not even clear…

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If Your Brain Were Cut in Half, Would You Still Be One Person?

Yes, with minor disabilities. Roger Sperry’s split-brain research convinced him that the mind and free will are real

The true significance of the split-brain experiments goes far beyond the significance of the lateralization of the brain; your essential unity also points to the immaterial nature of the mind.

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Michael Egnor on Splitting the Brain and Staying You

If you lose all four of your limbs, are you still you? Most people would say yes. What if your brain were cut into two pieces? Would you still be you? Robert J. Marks and Dr. Michael Egnor discuss splitting the brain and the research of Roger Sperry. Show Notes 00:30 | Introducing Dr. Michael Egnor, Professor of Neurosurgery and…

Two Scientists in the Brain Research Laboratory work on a Project, Using Personal Computer with MRI Scans Show Brain Anomalies. Neuroscientists at Work.

Pioneer Neuroscientists Believed the Mind Is More Than the Brain

A number of them were Nobel Laureates and their views were informed by their work

In a podcast discussion with Walter Bradley Center director Robert J. Marks, neurosurgeon Michael Egnor talks about how many famous neuroscientist became dualists—that is, they concluded that there is something about human beings that goes beyond matter—based on observations they made during their work.

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Photo by Bret Kavanaugh

Yes, Split Brains Are Weird, But Not the Way You Think

Scientists who dismiss consciousness and free will ignore the fact that the higher faculties of the mind cannot be split even by splitting the brain in half

Patients after split-brain surgery are not split people. They feel the same, act the same, and think the same, for all intents and purposes. Materialists like Jerry Coyne focus on subtle differences and distort the big picture.

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Concept of brain surgery or neurosurgery. Neurosurgeon holding scalpel in hand over 3D anatomical model of human brain. Brain surgery operations for treatment of diseases - tumor, aneurysm, epilepsy
Scalpel on model of brain

Some People Think and Speak with Only Half a Brain

A new study sheds light on how they do it

A range of neuroscience research findings is more readily explained by assuming that some aspects of thought–– abstract intellectual thought and free will–– are immaterial.

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Man silhouette on rural landscape background. Psychiatry and psychology concept.

Four Researchers Whose Work Sheds Light on the Reality of the Mind

The brain can be cut in half, but the intellect and will cannot, says Michael Egnor. The intellect and will are metaphysically simple

Neurosurgeon Michael Egnor was featured in a short film as a supplement to the Science Uprising series. There, he mentions four researchers who have shed light on the non-material mind nature of our minds: Wilder Penfield (1891–1976): Some of the earliest evidence came from neurosurgeon Wilder Penfield, who was the pioneer in epilepsy surgery in the mid 20th century. Penfield operated on over a thousand epilepsy patients while they were awake (under local anesthesia), and he stimulated their brains with electrodes in order to identify epileptic regions for surgical resection. He carefully recorded their responses to stimulation. In his book Mystery of the Mind, (1975) Penfield noted: “When I have caused a conscious patient to move his hand by applying…