Dr. David Spiegel: Using Hypnosis to Enhance Health & Performance | Huberman Lab Podcast #60

Brain Activity

During hypnosis, specific brain regions exhibit unique activity patterns. David Spiegel explains that the dorsal anterior cingulate cortex (DACC) reduces its activity, which minimizes distractions and enhances focus 1. This is crucial for maintaining the hypnotic state. Additionally, the dorsolateral prefrontal cortex (DLPFC) shows increased connectivity with the insula, allowing for greater control over bodily functions, such as gastric acid secretion 2. This connection exemplifies the mind's ability to influence physical states.

The brain has this amazing ability to control what's going on in the body in ways that we don't think we have ability to control.

--- David Spiegel

Furthermore, the posterior cingulate cortex, part of the default mode network, decreases its activity, promoting cognitive flexibility and dissociation from self-reflection 2. This neural activity supports the therapeutic benefits of hypnosis, such as enhanced cognitive flexibility.

   

Hypnotizability

Hypnotizability, the capacity to enter a hypnotic state, varies among individuals and is assessed through specific tests. David Spiegel describes the Spiegel Eye-Roll Test, which evaluates this ability by observing the coordination of eye and eyelid movements 3. This test highlights the unique state of inward focus achieved during hypnosis. Interestingly, hypnotizability peaks during childhood and becomes stable by early adulthood, as shown in longitudinal studies at Stanford 4.

Normally, when we close our eyes, also we're going to sleep. You're not worried about what's going on in the world anymore here, you're maintaining resting alertness, so you're focusing, but you're turning inward.

--- David Spiegel

Approximately two-thirds of people can be hypnotized, with 15% being highly hypnotizable. While repeated hypnosis may slightly enhance this ability, the focus should be on utilizing one's existing capacity to address specific issues 3.