A landscape-style, painterly image shows two people standing on opposite sides of a glowing, winding boundary line. One side is bathed in warm sunlight and rolling fields; the other is set beneath a swirling, star-filled night sky. The figures face one another across the boundary, suggesting different ways of perceiving and maintaining connection rather than separation.

Boundaries by Neurology in Neurodiverse Relationships

February 07, 20264 min read

Boundaries by Neurology in Neurodiverse Relationships

Once boundaries are understood as a neurologically shaped process rather than a set of rules, the next question becomes clearer: how do different brains actually experience and maintain boundaries? In neurodiverse relationships, boundary dynamics are rarely symmetrical. They emerge from distinct perceptual systems interacting in real time, each using different kinds of information to determine where self ends and other begins.

Understanding these differences does not require ranking one style as healthier than another. It requires recognizing that boundaries are formed, perceived, and repaired through different pathways depending on neurology.


How Non-Autistic Nervous Systems Experience Boundaries

For many non-autistic individuals, boundaries are supported by immediate social awareness. Facial expressions, body language, tone shifts, and subtle emotional cues provide constant feedback about how others are experiencing an interaction. This feedback helps regulate interpersonal distance moment by moment, often without conscious effort.

Because this awareness happens quickly and continuously, non-autistic boundaries often feel implicit. There is an internal sense of what belongs to the self and what belongs to the other, shaped by ongoing perspective-taking. This can create a flexible buffer between people—one that allows for adjustment, grace, and restraint without the need for explicit discussion.

In neurodiverse relationships, this implicit boundary system can become a source of confusion. Non-autistic individuals may assume that boundaries are mutually felt and understood, even when they are not. When their internal signals are not mirrored or responded to in expected ways, they may experience discomfort, erosion, or overextension without immediately recognizing why.


How Autistic Nervous Systems Experience Boundaries

Autistic individuals often experience boundaries through a different process. Without immediate body-based access to others’ perspectives, boundaries are more likely to be constructed through cognition, memory, and learned patterns rather than through real-time embodied feedback. Awareness of another person’s internal experience may arrive later, after reflection or explicit communication.

This does not mean that autistic individuals lack boundaries. Rather, their boundaries may be clearer internally than interpersonally. When one’s own perspective is held with intensity and consistency, it can be difficult to register where another person’s perspective diverges—especially if that divergence is communicated subtly or indirectly.

In some contexts, especially between two autistic individuals, this can result in unusually clear boundaries because communication is more direct and verbal. In other contexts, particularly neurodiverse ones, it can lead to unintentional boundary crossings—not out of disregard, but out of delayed or incomplete access to social feedback.


Where Misalignment Commonly Occurs

Boundary challenges in neurodiverse relationships often arise not because either person lacks care or respect, but because each nervous system is relying on different information to guide behavior. One person may be tracking emotional shifts in real time. The other may be tracking consistency, logic, or previously established rules. When these systems interact without shared language, misunderstandings multiply.

Common points of friction include:

  • assuming awareness that is not present

  • expecting implicit signals to be sufficient

  • mistaking delayed insight for indifference

  • interpreting accommodation as mutual agreement

Over time, these mismatches can harden into patterns. Non-autistic individuals may begin to over-accommodate, absorbing discomfort in order to preserve connection. Autistic individuals may become more entrenched in their perspective, especially if they do not receive clear feedback that boundaries have been crossed.


Why Explicit Boundaries Matter in Neurodiverse Relationships

In neurodiverse contexts, boundaries often need to be made more explicit—not because one person is failing, but because the relationship requires translation between different perceptual systems. Clear boundaries provide structure where implicit signals fall short. They offer information that some nervous systems cannot reliably infer without direct input.

Importantly, explicit boundaries support both people. They reduce the likelihood that non-autistic partners will erode their own sense of self through silent accommodation. They also give autistic partners the concrete feedback they need to understand where relational lines exist, rather than having to guess based on incomplete data.

Explicit boundaries are not a demand for conformity. They are a form of shared orientation.


Boundaries as an Ongoing Process, Not a One-Time Skill

Boundaries in neurodiverse relationships are not established once and then maintained automatically. They are renegotiated as relationships deepen, roles change, and contexts shift. What works in friendship may not work in parenting. What feels manageable early in a relationship may become unsustainable over time.

Understanding how boundaries differ by neurology allows these shifts to be approached with clarity rather than blame. It creates room for adjustment without requiring either person to abandon their natural way of perceiving the world.

In the next posts, we will explore what happens when boundary misalignment goes unaddressed—and how patterns of accommodation, withdrawal, and escalation can emerge from systems that lack shared boundary language. But before any repair is possible, boundaries must first be seen for what they are: neurologically mediated, relationally consequential, and foundational to Neurodiverse Relationship Dynamics™.

Next Post In This Series: Non-Autistic Accommodation and Autistic Masking Both Lead to Escalation in Neurodiverse Relationships

Previous Post In This Series: Boundaries as a Core Element of Neurodiverse Relationship Dynamics™

Anne MacMillan, MLA is the founder of R.E.A.L. Neurodiverse 10-Step Family Systems Approach, designed to support Level 1 autistic adults and their neurodivergent and neurotypical family members as they come to understand what makes them different, work to improve their relationships, and take action to improve their lives. MacMillan has over 50 years of personal life experience with neurodiverse family systems, over 20 years of personal life experience in a neurodiverse intimate life partnership, and has been professionally supporting autistics and non-autistic adults in neurodiverse close family relationships since 2017.  She has a master's in psychology from Harvard University where she did some of the world's first quantitative research on autism and intimate life partnerships. She self-identifies as a high body empathetic, or a non-autistic neurodivergent with a high level of body empathy.

Anne MacMillan, MLA

Anne MacMillan, MLA is the founder of R.E.A.L. Neurodiverse 10-Step Family Systems Approach, designed to support Level 1 autistic adults and their neurodivergent and neurotypical family members as they come to understand what makes them different, work to improve their relationships, and take action to improve their lives. MacMillan has over 50 years of personal life experience with neurodiverse family systems, over 20 years of personal life experience in a neurodiverse intimate life partnership, and has been professionally supporting autistics and non-autistic adults in neurodiverse close family relationships since 2017. She has a master's in psychology from Harvard University where she did some of the world's first quantitative research on autism and intimate life partnerships. She self-identifies as a high body empathetic, or a non-autistic neurodivergent with a high level of body empathy.

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