Understanding Neurodivergent Nervous Systems - What is Happening Beneath Labels and Behaviour?

This blog supports Charlotte's Neurodiversity Support webinar, available inside Whole Health membership.

Neurodiversity describes the natural variation in how human brains and nervous systems process information, regulate emotions, and respond to sensory and social environments.

Rather than representing deficits alone, neurodivergence reflects a spectrum of neurological diversity within human populations, including autism spectrum conditions, ADHD, dyslexia, dyspraxia and overlapping presentations.

The March 2026 Natural Health Webinar inside Whole Health explores how these differences arise not just cognitively, but through the entire nervous system — from neurotransmitters and sensory pathways to metabolism and stress physiology. Here we give a flavour of how we can support the often more sensitive needs expressing in those who do not feel that fit into boxes of expected societal ‘norms’.

Sensory processing as a core feature

A central theme of neurodivergence is sensory processing difference. Neurodivergent individuals may experience hypersensitivity (intense responses) or hyposensitivity (reduced awareness) to sound, light, touch, movement, social stimuli or internal body signals.

These sensory differences influence concentration, emotional regulation and social comfort, and they are neurological in origin rather than behavioural choice.

When sensory input exceeds the nervous system’s capacity to regulate and integrate stimuli, sensory overwhelm can occur. This may show up as anxiety, irritability, withdrawal, shutdown or attempts to escape the environment – either by physically moving away, or retreating inwardly and shutting down.
Importantly, overwhelm is often misinterpreted as behavioural difficulty, when it is actually a protective neurological response. Reducing sensory load can have a relieving effect (like a pressure valve) and help support wellbeing and cognitive functioning.

Neurotransmitters and regulation

Neurotransmitters are chemical messengers in the brain that play a critical role in how sensory information is filtered and interpreted. Several are known to often be affected in those with neurodiversity; most notably dopamine, serotonin, GABA and glutamate. Some understanding of these helps navigate a path to regulate tendencies to overwhelm or cognitive overload.

Dopamine

Dopamine influences motivation, reward processing, movement control, curiosity, pleasure, and attention regulation. Altered dopamine signalling is strongly associated with ADHD and can affect executive functioning, task initiation, and impulse regulation.

Reduced dopamine activity may make sustained attention and motivation more difficult, while novelty, interest, movement, and stimulation may temporarily enhance focus and energy.

How to support dopamine levels:

• Joy, creativity, play, and meaningful connection
• Novelty and achievable reward (“small wins”)
• Regular movement, especially rhythmic or stimulating exercise
• Protein intake (dopamine is made from amino acids such as tyrosine)
• Blood sugar balance for stable brain energy
• Nature exposure and sunlight
• Cold exposure or contrast showers (for some individuals)
• Music, dancing, laughter, and pleasurable sensory experiences
• Somatic practices that increase vitality and embodiment
• Reducing chronic stress and burnout, which deplete dopamine reserves
• Nutrients involved in dopamine production: iron, magnesium, vitamin B6, zinc, omega 3 oils

Serotonin

Serotonin contributes to mood stability, emotional regulation, sensory processing and gastrointestinal function.

Around 90% of serotonin is produced in the gut, highlighting the importance of gut health in nervous system regulation.

Dysregulation may contribute to anxiety, low mood, rigid thinking patterns, sleep disruption, or sensory hypersensitivity.

How to support serotonin levels:

• Morning sunlight exposure to regulate circadian rhythms
• Consistent, restorative sleep
• Regular movement, especially walking and aerobic exercise
• Protein intake (particularly tryptophan-containing foods)
• Healthy gut microbiome and digestive function
• Social connection and feelings of safety
• Relaxation and parasympathetic activation
• Breathwork with longer exhales to calm the nervous system
• Gentle rhythmic movement: walking, swimming, rocking motions, mindful yoga, somatics
• Reducing inflammation
• Blood sugar regulation
• Nutrients involved in serotonin production: magnesium, vitamin B6, folic acid, omega 3 oils

GABA

GABA is the brain’s primary inhibitory neurotransmitter, meaning it helps bring activity and reactivity levels down after stimulation or stress. It acts like the nervous system’s “brake pedal,” helping the body shift into calm, recovery, and safety.

Reduced inhibitory signalling and lower GABA activity have been proposed as contributors to sensory hypersensitivity, anxiety, overwhelm, hypervigilance, and difficulty winding down.

How to support GABA levels:

• Magnesium-rich foods and supplementation
• Allowing breath to slow and focus on the exhale
• Meditation and mindfulness practices
• Physical touch, massage, and safe connection
• Gentle pressure and grounding sensory input
• Yoga, stretching, and slow rhythmic movement
• Somatic regulation practices: orienting, grounding, body scanning, shaking/tremoring to discharge stress activation
• Humming, singing, and vagus nerve stimulation
• Reducing overstimulation and excessive screen exposure
• Consistent sleep and nervous system recovery
• Herbal support (where appropriate): lemon balm, passionflower, chamomile

Glutamate

Glutamate is the brain’s primary excitatory neurotransmitter. It plays an essential role in learning, memory, cognition, and neural activation. However, excessive glutamate activity may contribute to sensory overload, hyperexcitability, anxiety, cognitive fatigue, migraines, and nervous system burnout.

Healthy nervous system regulation depends on balance between glutamate (activation) and GABA (calming/inhibition).

How to support glutamate levels:

• Support GABA production and nervous system regulation
• Reduce chronic stress and sympathetic overactivation
• Prioritise sleep and recovery
• Stabilise blood sugar and avoid excessive stimulants
• Magnesium to help regulate excitatory signalling
• Omega-3 fatty acids for neuronal membrane stability
• Gentle aerobic movement to metabolise stress chemistry
• Somatic practices that discharge excess activation
• Time in nature and sensory down-regulation
• Reduce inflammatory load where possible
• Avoid constant multitasking and cognitive overstimulation
• Create cycles of activation followed by recovery/rest

Overall neurotransmitter regulation

Healthy nervous system regulation depends on balance between activation and calming systems. Supporting neurotransmitters is not simply about increasing or decreasing one chemical messenger, but about creating the conditions in which the nervous system feels safe, nourished, regulated, and resilient.

A whole‑system perspective

Neurodivergent traits frequently overlap and co occur, rather than appearing in isolation.

Metabolism, sleep, gut brain communication, immune signalling and stress physiology all influence how neurological traits are expressed day to day. Recognising this complexity helps move away from rigid diagnostic thinking and toward personalised, compassionate support.

The full March 2026 webinar, which explores neurodivergent nervous systems, sensory processing and regulation strategies in depth, is available to watch inside the Whole Health membership.