Ketamine causes a temporary surge of a crucial neurotransmitter called glutamate. This surge acts like an electrical restart for stressed-out neural networks. The surge of glutamate triggers the release of BDNF (Brain-Derived Neurotrophic Factor). BDNF is often referred to as a “Fertilizer” for the brain. It tells the neuron to start building physical structures again.
Chronic stress literally "prunes" or withers the neural architecture in your brain—specifically the dendritic spines, which are the tiny, branch-like connection points that neurons use to talk to each other. Studies have shown that ketamine supports the regrowth of these withered dendritic spines and restores communication in areas like the prefrontal cortex.
When you are deeply stressed or burnt out, your brain loses its structural flexibility, making you feel emotionally "stuck," cynical, and unable to see a way out. By physically building new connection points, ketamine provides a "neuroplastic window." It creates a period where your brain is structurally more capable of learning new habits, processing stress, and breaking out of negative thought loops. This is one theory as to why it may be helpful with treating depression, ptsd, anxiety, OCD, and burn out.
How is it used in the therapeutic setting?
Ketamine-Assisted Therapy combines psychotherapy and ketamine. Routes of administration include IV, IM, and oral forms. A psychedelic approach entails a high dose of ketamine evoking a deep, non-verbal, internal and possibly psychedelic experience; a person wears an eye-mask, listens to a curated playlist, and is guided by a trusted therapist. The journey itself lasts about an hour, quite shorter than other psychedelic experiences. Before the medicine journey, the client engages in a certain number of preparation sessions, and afterwards during the neuroplasticity window the client engages in the essential integration process.
A psycholytic approach entails a low-to-moderate dose to relax psychological defenses while keeping the client conscious, grounded, and able to talk. The goal is to enhance emotional openness, reduce anxiety, and expand the window of tolerance, making it easier to work through difficult material in session. Therapists like myself are blending ketamine with EMDR and parts work to support trauma work.