Adult Child · Andrea Ashley

211: Nate Postlethwait - Building a Life Your Nervous System Can Handle

December 24, 2025·1 hr 17 min·6 clips

Nate Postlethwait announces he's leaving social media in January to build a work life his nervous system can handle.

The opening is messy and familiar. After ad copy and a Christmas Eve check-in, the host places the episode in recovery from dysfunctional family systems, alcoholism, anxious attachment, and the emotional strain of getting through the end of the year. Then the room gets quieter. The strongest part follows the guest trying to explain what changed after they understood long-standing overwhelm as autism, not only CPTSD. It is not a neat point, which is part of why it works. The guest talks about reading theories of autistic brain development, including faster amygdala growth from birth to age 12 and heightened stimulation, while being plain about the limits of their own knowledge. They are not trying to sound like a neurology expert. They are trying to explain why ordinary rooms could feel like emergencies. The story stays in the body. The guest describes realizing, two years ago, that not everyone feels a siren in their stomach when multiple sounds fill a room. That realization hurts. It means some coping tools were aimed at the wrong problem, because breath work and meditation were never going to erase those sound and stimulation thresholds. The reframe changes the tools. Noise-canceling headphones stop being a comfort item and become real support for getting separation from stimulation. Silence becomes necessary, not indulgent. Even the hum of a refrigerator is described as relief, because it can cover other sounds and help the body settle. The conversation still feels like Adult Child. A simple question opens into a small detail, and the detail shows how much the body had been carrying. Nobody tries to polish it. The guest forgets the question, circles back, and still gives the clearest answer: managing symptoms starts with making space for autism in daily life. What looked like being difficult, sensitive, or unable to cope may have been an overloaded body asking for conditions it could actually handle.

As heard by us

When a catchall stress story stops working, autism and sensory overload start making sharper sense.

The episode traces a move from a broad stress story to a more exact understanding of autism and sensory overload. Andrea describes what changes when the feeling finally has a name: the way the body is read, the pull of stimulation, the sense of a siren in the stomach, and the…

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Why you'd press play

When trauma language stops fitting, this episode gives your overload a different name.

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