Andrew Huberman|07. Mai
Essentials: Compulsive Behaviors & Deep Brain Stimulation | Dr. Casey Halpern
Introduction and Background
- Andrew Huberman welcomes Dr. Casey Halpern, a neurosurgeon from Stanford School of Medicine.
- Halpern specializes in stereotactic functional neurosurgery, performing deep brain stimulation (DBS) and focused ultrasound (MRgFUS).
- Obsessive-Compulsive Disorder (OCD) is described as a spectrum disorder – from useful control to severe, treatment-resistant cases.
- Affected brain regions: prefrontal cortex, orbitofrontal cortex, basal ganglia (caudate/putamen), and ventral striatum (nucleus accumbens).
- First-line therapies: SSRIs, tricyclic antidepressants, and exposure and response prevention (ERP).
- About 30% of patients do not respond adequately to standard treatments.
- Surgical options: DBS (electrical stimulation) and capsulotomy (thermal ablation). Response rate is about 50%, but patients still have symptoms.
- The nucleus accumbens is a key part of the reward system, involved in craving and compulsive behavior.
- Analogous to tremor in Parkinson’s: Halpern identified “craving cells” in the OR, whose activity correlates with the urge to act compulsively.
- The „urge despite risk“ principle connects OCD, eating disorders, and addiction.
- Transcranial magnetic stimulation (TMS): FDA-approved for depression, OCD, and nicotine addiction; still lacks spatial precision.
- MRgFUS (focused ultrasound): FDA-approved for essential tremor; enables non-invasive ablation.
- Challenge: For OCD, eating disorders, or addiction, precise targets are missing – invasive recordings (stereo-EEG) are needed to identify the right areas.
- Stereo-EEG (originally for epilepsy) is used to better understand psychiatric disorders (depression, OCD) and discover new targets for DBS or ultrasound.
- Lab studies with mood provocation and eye-tracking show: Even when aware, severe patients cannot control binge episodes.
- Artificial intelligence and wearables (voice analysis, breathing, sleep) could detect impulsive behavior early – scalable solutions for major public health problems (obesity, opioid crisis, depression).
- Halpern emphasizes: Neurosurgery can only help the most severe patients (about 200,000 DBS surgeries worldwide). The future lies in non-invasive, AI-driven methods based on real brain signals.
- The conversation highlights the bridge between neurosurgery and psychiatry and the need for precise, scalable therapies for common mental disorders.
