# How Cross-Crawl Movements Change Brain Function
There is a simple movement that children do naturally when crawling, athletes know it from warm-ups, and neurologists study it as a key to better brain function. It is called the cross-lateral movement, or cross-crawl, and although it looks unassuming, its influence on concentration, memory, and overall mental performance is surprisingly profound. At a time when people struggle with chronic distraction, information overload, and an inability to maintain attention for more than a few minutes, it is worth taking a closer look at this phenomenon.
The brain is not a monolithic structure. It consists of two hemispheres – left and right – connected by a dense bundle of nerve fibers called the corpus callosum. The left hemisphere controls logical thinking, speech, and analysis, while the right handles creativity, spatial perception, and intuition. For the brain to function truly effectively, both halves need to cooperate and exchange information with each other. And this is precisely where cross-lateral body movements come into play.
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What happens in the brain during cross-lateral movement
A cross-lateral movement is essentially any movement in which one part of the body crosses the midline and engages the opposite side. The classic example is alternately raising the right knee to the left elbow and vice versa – a movement that resembles walking or crawling. A seemingly simple exercise, but what happens inside the skull during it is fascinating.
Each hemisphere of the brain controls the opposite side of the body. The left hemisphere controls the right hand and right leg, while the right hemisphere controls the left side of the body. When a person performs a cross-lateral movement – that is, simultaneously engaging the right leg and left arm or vice versa – they force both hemispheres to communicate. Signals must pass through the corpus callosum, and the more we train this crossing, the more efficient and faster this neural communication becomes. Neurologists call this increasing inter-hemispheric connectivity, and research shows that this connectivity is directly related to cognitive abilities such as attention, working memory, and the ability to switch between different tasks.
Studies published in the peer-reviewed journal Frontiers in Human Neuroscience repeatedly confirm that people with a better-connected corpus callosum show better results in tests focused on attention and information processing speed. This is not merely theory – it is a measurable neurological phenomenon.
To be clear: hemispheric connectivity is not a static trait one is born with and that never changes. The brain is plastic, meaning capable of changing and adapting throughout life. This principle, known as neuroplasticity, means that through regular training – including physical training – it is genuinely possible to influence how efficiently the hemispheres communicate with each other.
Cross-lateral movements in practice: from the nursery to the office
The idea that movement influences the brain is not new. As early as the 1980s, it was systematically developed by American educator Paul Dennison, who created a method called Brain Gym – a set of simple movement exercises designed to improve learning and concentration. Dennison drew on insights from kinesiology and neuroscience, and his approach quickly gained followers not only in schools but also in the corporate world and sports. As he himself said: "Movement is the door to learning." And although the academic community had mixed views on the Brain Gym method, the fundamental principle – that cross-lateral movements activate inter-hemispheric communication – is supported by solid neurological research.
A practical example from everyday life might look something like this: Jana, an accountant from Brno, complained of chronic concentration problems when working with numbers. In the afternoons she was unable to maintain attention for more than twenty minutes, and the error rate in her reports was increasing. On the recommendation of her physiotherapist, she began incorporating short breaks with cross-lateral movements into her working day – just three to five minutes of alternately raising her knees to the opposite elbows, touching the opposite knee with her hand. After three weeks, she noticed that she was better able to maintain focus even in the late afternoon hours and that she was making fewer errors. Of course, this is a personal experience, not a clinical study, but thousands of similar testimonials exist – and neuroscience offers a logical explanation for why it works.
Cross-lateral movements do not only connect the hemispheres. They also activate the vestibular system – the inner ear and balance organs – which plays a key role in regulating attention. Studies from Harvard Medical School show that physical activity in general increases levels of the neurotrophic factor BDNF (brain-derived neurotrophic factor), a substance that supports the growth of new neural connections and improves cognitive function. Cross-lateral movements are particularly effective in this regard, because they engage the entire body in a coordinated manner while also requiring a certain degree of attention and coordination – thus training the brain and body simultaneously.
It is also interesting how much inter-hemispheric connectivity matters in specific everyday situations. Reading, writing, playing a musical instrument, driving a car – all of these are activities that require cooperation between both sides of the brain. If this cooperation falters, it manifests precisely as mental fatigue, an inability to concentrate, or the so-called "brain fog" that so many people working sedentary jobs know today.
A sedentary lifestyle is one of the greatest enemies of inter-hemispheric communication. When a person sits at a computer for hours, they move minimally and symmetrically – both hands rest on the keyboard, the body is in a resting position, no crossing of the midline takes place. The brain receives only a limited number of proprioceptive signals (signals from the musculoskeletal system) and its activity decreases. It is no wonder that after four hours of sitting at a monitor, thoughts begin to blur.
How to incorporate cross-lateral movements into everyday life
The good news is that improving hemispheric connectivity requires no expensive equipment or hours of exercise. Cross-lateral movements can be incorporated into the day in various ways, and their effect comes fairly quickly – sometimes after just one short session, a greater sense of mental alertness can be felt.
Among the simplest and most effective are:
- Alternately raising the knees to the opposite elbows while standing or sitting – the classic cross-crawl movement, ideal as a morning warm-up or work break
- Walking with conscious attention to the alternation of opposite limbs – left leg, right arm and vice versa
- Crossing the arms over the chest and slowly rotating the torso – a simple movement that can be done even at a desk
- Crawling on all fours – a movement that children do instinctively and which is one of the most natural cross-lateral patterns of all
- Tapping – alternately tapping the hands on opposite knees in a rhythmic tempo
The key is not intensity, but regularity and conscious attention during movement. If a person performs cross-lateral movements automatically, without concentration, the effect is lesser. When one focuses on coordination and is aware of what the body is doing, the brain is forced to process proprioceptive information more actively and inter-hemispheric communication intensifies.
For children, cross-lateral movements are particularly important. The crawling phase – that is, movement on all fours, in which the child alternates a hand with the opposite knee – is a key developmental milestone that helps build the foundations for later reading, writing, and concentration abilities. Children who skipped this phase or passed through it too quickly may have difficulties with coordination or learning in later life. This of course does not mean that every child with dyslexia did not crawl – but it does show how deeply movement patterns are connected to cognitive development.
Adults are no different. Research in the field of neuroscience consistently shows that physical activity involving complex movement patterns – such as dance, martial arts, or cross-crawl exercises – brings more pronounced cognitive benefits than simple aerobic activity without a coordination component. The brain is simply more stimulated when it must solve movement tasks that require inter-hemispheric cooperation.
It is also worth mentioning that cross-lateral movements have a positive effect on emotional regulation. The prefrontal cortex, which is responsible for managing emotions, planning, and decision-making, works better when both hemispheres are well connected. People who regularly incorporate cross-lateral movements into their day therefore often report not only better concentration, but also a greater sense of calm and emotional stability – qualities that virtually everyone longs for in today's hectic world.
The mind-body connection is not merely a trendy phrase from the wellness industry. It is a neurological reality that science is increasingly understanding and documenting. Cross-lateral movements are one of the most elegant examples of how a simple physical intervention can have a profound impact on mental functioning – without pills, without expensive devices, without complex protocols. All it takes is to stand up, raise the right knee to the left elbow, and then repeat on the other side. And to do it again and again, day after day.
The brain changes with every movement we make. And if these movements are cross-lateral, connecting the left and right sides of both body and mind, then this change is heading in the right direction – toward greater concentration, better memory, and an overall fresher head. At a time when concentration has become a scarce commodity, this is a message that deserves attention.
