What if the person you believe yourself to be—your personality, your memories, your motivation, even your perception of reality—is far less fixed than you think? In this episode, I sit down with Oxford neurologist and cognitive neuroscientist Professor Masud Husain for one of the most fascinating explorations I've had into what actually makes us who we are. We unpack how the brain constructs our sense of self, why what we experience as "reality" is actually a representation created by the brain, and what patients with neurological disorders can teach us about just how fragile identity can be. Masud explains why dopamine is less about pleasure and more about our motivation to act, how a tiny change in the brain can dramatically alter personality and behavior, and why our memories aren't recordings of the past but reconstructions that can change over time. We also go deep into free will and whether our choices are ever truly free when every decision is influenced by previous experiences, memories, biology, and unconscious processes. From hallucinations and false memories to the voice inside your head, consciousness, attention, and the surprising amount of information influencing you without ever entering conscious awareness, this conversation ultimately raises a powerful question: if your brain is constantly constructing your experience of reality, how much of the person you believe yourself to be is actually capable of changing?
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00:00 – What Actually Makes You, You?
02:14 – Is the Brain Different From the Mind?
04:34 – Your Brain Is Creating a Simulation of Reality
08:56 – Is There Really a Singular "Self"?
12:02 – Confidence, Truth and How We Define Reality
16:18 – How Your Brain Makes Decisions
18:04 – How Brain Damage Can Completely Change Motivation
20:44 – The Neuroscience of Motivation and Apathy
23:25 – Dopamine's Real Role in Motivation
27:21 – Why Apathy May Require More Brain Activity
29:16 – How to Make Motivation Easier
31:10 – The Myth of Dopamine Hits and Dopamine Detoxes
34:18 – What Happens When Dopamine Gets Too High?
35:55 – Do We Lose Ourselves One Brain Function at a Time?
40:02 – Can Changing the Brain Change the Self?
44:20 – The Ethics of Altering the Brain
48:40 – The Treatments Transforming Neurological Disease
52:45 – Do We Actually Have Free Will?
55:20 – Can Your Choices Create Your Reality?
56:23 – How Experiences Shape the Choices We Make
57:55 – If You Lost Every Memory, Would You Still Be You?
60:17 – What Is a Memory, Really?
60:58 – Your Memories Are Reconstructions, Not Recordings
62:32 – False Memories and Confabulation
66:36 – Is Memory Constantly Recreating Your Identity?
68:03 – When an Experience Feels More Real Than Reality
68:48 – Delusions, Hallucinations and the Brain's Version of Truth
70:41 – The Terrifying Power of Belief
72:58 – Can We Think Without Language?
74:08 – What Is the Voice Inside Your Head?
75:33 – Are Thoughts Created or Received?
78:37 – Neglect Syndrome: How the Brain Can Ignore Half of Reality
83:39 – Can Neuroscience Explain Consciousness?
85:19 – Your Brain Processes Things You're Not Conscious Of
87:10 – Rapid Fire: Social Media, Dopamine, Loneliness and AI
89:25 – Can Purpose Be Measured in the Brain?
89:45 – What Does Ever Forward Mean to Masud?
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Episode resources:
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- Get Dr. Husain's book Our Brains, Our Selves
