When the Gut, Brain and Nervous System Are Out of Balance

Understanding the Hidden Drivers Behind Behaviour, Learning and Development

One of the biggest misconceptions in child development is that behaviours exist in isolation.

Parents often seek help because their child is experiencing:

• Emotional outbursts

• Anxiety

• Poor sleep

• Speech delays

• Sensory sensitivities

• Poor balance

• Learning difficulties

• Attention challenges

• Aggression

• Social difficulties

But what if these symptoms are not the problem?

What if they are clues pointing us towards underlying systems that have not fully developed or are under stress?

At Brain Development UK, we look beyond labels and focus on the foundations of development. Often, when we assess a child, we find a combination of retained primitive reflexes, sensory processing difficulties, balance problems, nervous system dysregulation and physiological stress identified through laboratory testing.

When these systems overlap, they can create a very recognisable pattern.

The Brainstem: The Foundation of Development

The brainstem is one of the most important areas of the nervous system.

It controls:

• Survival responses

• Regulation

• Sleep

• Balance

• Breathing

• Heart rate

• Sensory filtering

• Primitive reflexes

The brainstem develops first and forms the foundation upon which higher brain functions are built.

When the brainstem is immature or under stress, children often remain stuck in lower-level brain networks.

Common signs include:

• Fight-or-flight responses

• Emotional dysregulation

• Anxiety

• Poor sleep

• Sensory sensitivities

• Difficulty coping with change

• Poor attention

• Delayed speech and language

Many parents describe their child as being "constantly on alert" or moving quickly from calm to overwhelmed.

Primitive Reflexes: The Body's Early Survival Programs

Primitive reflexes are automatic movements that help babies survive and develop.

These reflexes should integrate during infancy.

However, when they remain active, they continue to influence how the brain and body function.

Common retained reflexes include:

Moro Reflex

Children may show:

• Anxiety

• Emotional outbursts

• Hypervigilance

• Difficulty with transitions

• Sensitivity to sound

• Poor stress tolerance

Palmar Reflex

Children may show:

• Speech delays

• Fine motor difficulties

• Poor handwriting

• Hand fidgeting

• Oral motor challenges

Rooting Reflex

Children may show:

• Speech difficulties

• Dribbling

• Oral sensory seeking

• Picky eating

ATNR

Children may show:

• Poor coordination

• Difficulties crossing the midline

• Reading difficulties

• Poor eye tracking

• Problems using both sides of the body together

STNR

Children may show:

• Poor posture

• Fidgeting

• Weak core strength

• Difficulty sitting still

• Poor balance

Retained primitive reflexes often indicate that the brainstem and sensory systems have not fully matured.

The Vestibular System: The Hidden Sense Behind Balance and Regulation

The vestibular system sits within the inner ear and acts as the body's movement and balance system.

It helps us understand:

• Where our body is in space

• Which way is up

• How to coordinate movement

• How to stabilise our eyes while moving

When the vestibular system is immature, children may struggle with:

• Poor balance

• Clumsiness

• Fear of movement

• Constant movement seeking

• Difficulty sitting still

• Motion sickness

• Delayed motor skills

The vestibular system is also closely connected to attention, emotional regulation and learning.

Many children who struggle with focus and sensory processing also show vestibular immaturity.

The Cerebellum: More Than Coordination

Traditionally, the cerebellum has been viewed as a movement centre.

We now know it is involved in far more than that.

The cerebellum helps regulate:

• Balance

• Coordination

• Eye movements

• Speech timing

• Attention

• Social engagement

• Emotional regulation

• Learning

When cerebellar function is weak, children may show:

• Poor balance

• Delayed motor skills

• Speech delays

• Eye tracking difficulties

• Attention challenges

• Emotional dysregulation

• Poor body awareness

Many children who struggle with communication and social interaction also have underlying cerebellar weaknesses.

Eye Tracking and Visual Processing

Eye movements are controlled by multiple cranial nerves and brainstem pathways.

When these systems are immature, children may struggle with:

• Reading

• Attention

• Tracking moving objects

• Hand-eye coordination

• Ball skills

• Copying from a board

• Visual attention

Poor eye tracking is often one of the most overlooked developmental signs.

Yet it can have a significant impact on learning and communication.

What Does an Organic Acids Test (OAT) Tell Us?

An Organic Acids Test can provide valuable information about what is happening inside the body.

In some children, we see patterns such as:

Mold and Fungal Markers

Elevated fungal markers may indicate:

• Mold exposure

• Yeast overgrowth

• Increased inflammation

• Oxidative stress

Children may present with:

• Brain fog

• Mood swings

• Anxiety

• Emotional dysregulation

• Sleep difficulties

• Sensory sensitivities

Parents often report:

"He goes from zero to one hundred in seconds."

High Oxalates

Oxalates are naturally occurring compounds found in certain foods and can also be produced by fungal overgrowth.

When elevated, they may contribute to:

• Irritability

• Hyperactivity

• Sensory sensitivity

• Poor sleep

• Emotional reactivity

• Anxiety

• Pain and discomfort

Children can appear far more emotionally reactive than expected because their nervous system is under constant physiological stress.

Mitochondrial Stress and Energy Production

The brain is one of the most energy-demanding organs in the body.

When energy production is impaired, children may struggle with:

• Emotional regulation

• Attention

• Learning

• Physical endurance

• Recovery after stress

Many parents describe these children as having good days and bad days, often depending on how much energy their nervous system has available.

Why Symptoms Often Come in Clusters

A child with:

• Retained primitive reflexes

• Poor balance

• Vestibular immaturity

• Weak cerebellar function

• Eye tracking difficulties

• Mold exposure

• Elevated oxalates

may present with:

• Speech delays

• Emotional outbursts

• Anxiety

• Poor sleep

• Sensory sensitivities

• Attention difficulties

• Learning challenges

• Aggression

• Social difficulties

These symptoms are not separate problems.

They are often different expressions of the same underlying developmental and physiological stress.

Building the Brain From the Foundation Up

At Brain Development UK, our approach is to strengthen the systems that support development.

This may include:

• Primitive reflex integration

• Vestibular development

• Balance training

• Eye tracking exercises

• Brainstem stimulation

• Cranial nerve activation

• Trigeminal nerve stimulation

• Vagus nerve regulation

• Nutritional support

• Addressing gut health

• Investigating environmental factors such as mold exposure

When we strengthen the foundations, we often see improvements in:

• Speech

• Attention

• Learning

• Emotional regulation

• Coordination

• Confidence

• Social engagement

Because children do not learn, communicate and regulate from the top down.

They develop from the bottom up.

When the foundation becomes stronger, everything built on top of it has the opportunity to grow.

Building Better Brains... One Foundation at a Time

At Brain Development UK, we believe every child deserves the opportunity to reach their potential. By understanding the connections between the brain, body, nervous system and environment, we can help children move beyond symptoms and build stronger foundations for learning, communication and life.