Embodying Autism: Make Sense of Sensory Surplus and Embrace Who You Are with Neuroscience and Internal Family Systems

A neuroscience-informed guide to understanding your autistic brain, body, and mind.

“A must-read for anyone seeking a deeper, kinder understanding of neurodiversity―from the inside out.”
―Elizabeth Gilbert, author of Eat, Pray, Love

Autism is not simply a difference in thinking―it is an embodied experience shaped by heightened sensory awareness, nervous system sensitivity, and perceptual intensity. For many autistic adults, this can lead to sensory overwhelm, shutdowns, difficulty with social expectations, and challenges navigating a world designed for neurotypical minds.

In this groundbreaking guide, autistic psychologist Sarah Bergenfield offers a new way of understanding autism as a condition of sensory surplus, supported by both personal insight and emerging scientific research. Psychotherapist Martha Sweezy joins Bergenfield in adapting internal family systems (IFS) therapy alongside principles from neuroscience and polyvagal theory to help autistic readers better understand their internal experiences and nervous system responses.

With this neuroaffirming guide, you’ll learn how to:

• Understand autism as an embodied sensory experience rooted in the brain, body, and nervous system
• Recognize patterns of sensory overwhelm, shutdown, and emotional dysregulation
• Use adapted IFS tools to build inner understanding and compassion
• Apply insights from neuroscience and polyvagal theory to regulate stress and sensory overload
• Advocate for your needs in relationships, work, and daily life
• Cultivate lasting self-acceptance as an autistic person

Through compassionate guidance and evidence-informed tools, this book helps you make sense of sensory disorganization, social expectations, and internal conflict―so you can navigate the world with greater confidence and self-trust.

Rather than viewing autism as a deficit, this empowering guide reframes it as perceptual diversity, helping you move beyond stigma, shame, and marginalization toward a life of authenticity, resilience, and flourishing.

Sarah Bergenfield, MA, is a certified Internal Family Systems (IFS) practitioner. Sarah specializes in supporting autistic clients in various stages of their diagnostic journey. A speaker and presenter, Sarah teaches about autism and how IFS can be used to increase understanding and self-acceptance. She lives in New Jersey.

Martha Sweezy, PhD, is an assistant professor in psychiatry part-time at Harvard Medical School, a research and training consultant at the Center for Mindfulness and Compassion at the Cambridge Health Alliance, and a psychotherapist in private practice. She teaches IFS therapy nationally and internationally, and has authored, coauthored, and coedited numerous books on various applications of IFS.

Foreword writer Beth Ann Malow, MD, is a neurologist whose clinical and research interests focus on improving health and quality of life for individuals on the autism spectrum. Malow has carried out foundation, industry, and federally funded trials of melatonin and behavioral sleep education in autism and other populations, including in community settings.