THE REAL BRAIN: No Hype, No “Go All In”
- Marcela Emilia Silva do Valle Pereira Ma Emilia
- há 1 dia
- 6 min de leitura
🧠 The real brain
We are living through a curious moment: never has the brain been talked about so much, and at the same time, rarely has it been so misunderstood.
Today, everything seems to fit under the “neuro” prefix: neuro-sales, neuroleadership, neurobranding, neuroperformance. At the same time, a culture of ready-made phrases, productivity hacks and quick slogans continues to grow, as if understanding the brain were simply about learning a few catchy terms and applying them to the market, personal life or high performance.
But the real brain is not “hype”, nor does it function through slogans.
🚨 It does not respond to shouting, frustration, shortcuts or the idea that we can simply sleep less, drink more coffee and demand infinite performance from it.
The brain is a biologically demanding, chemically delicate and deeply balanced organ. Although it represents around 2% of body weight, it consumes approximately 20% of the body’s energy at rest, precisely because it sustains continuous processes of perception, memory, decision-making, emotional regulation, motor coordination, scenario prediction and the maintenance of consciousness, among others.
This activity depends on a fine balance between excitatory neurotransmitters, such as glutamate, and inhibitory ones, such as GABA. In addition to modulatory systems such as dopamine, serotonin and noradrenaline, which directly influence motivation, mood, vigilance, cognitive flexibility and learning.
Reducing all of this, which has only just been introduced, to ready-made phrases or to the belief that it is enough to simply “want it more” is to underestimate the complexity of the organ that literally sustains our experience of the world.
✨ Perhaps this is the post that brings one of the most important messages in neuroscience today:
The brain is not a symbol of performance — it is the biological basis of our humanity.
☕ Coffee, sleep and the myth of the invincible brain
There is also a modern fantasy that the brain is almost unbeatable.
We sleep too little, increase our caffeine intake, push emotions aside for later, ignore signs of exhaustion and continue believing that, somehow, we will keep functioning at our maximum capacity.
But neuroscience shows the opposite.
Insufficient sleep alters memory consolidation, decision-making, emotional regulation and cognitive flexibility;
Chronic stress modifies circuits linked to attention and mood;
Excessive stimulation reduces depth of processing and increases mental fatigue.
Throughout the day, adenosine accumulates in the brain as a by-product of energy metabolism, increasing what is known as the homeostatic sleep pressure. In practical terms, this is physical and mental fatigue building up in brain circuits responsible for alertness.
This biological signal is essential to induce rest and allow restorative processes. These metabolic “residues” are dissipated during sleep, making our brain a self-recharging battery.
☕ When caffeine is introduced, it acts by blocking adenosine receptors, especially A1 (involved in synaptic inhibition and reduced cardiac excitability) and A2A (regulation of blood flow and dopamine release), temporarily reducing the sensation of fatigue.
⚠️The problem is that caffeine masks the signal—it does not solve the biological need.
Structures such as the hippocampus, which are fundamental for consolidating new memories, depend on N-REM and REM sleep to stabilise memory traces, integrate learning and reorganise information. But in this sequence of “self-deception”, all these processes and learnings are lost.
In other words, staying awake with coffee does not mean preserving cognitive performance. Very often, it simply means reducing the subjective perception of tiredness while executive functions, sustained attention and memory are already compromised.
🧠 The brain can compensate for a while.
But compensating is not the same as being well.
⚡ Brain chemistry is not a detail
Another common mistake is to treat the brain as if it were merely a matter of mindset.
But the brain is also chemistry — and dynamic chemistry.
🟣 Dopamine
Far more than “pleasure”, it is linked to salience, motivation, reward anticipation and the direction of behaviour. Alterations in this system appear, for example, in addiction, ADHD and Parkinson’s disease.
🔵 Noradrenaline
It is involved in alertness, vigilance, readiness and response to the unexpected, being crucial for sustained attention and rapid adaptation to the environment.
🟡 Serotonin
It acts in the regulation of mood, impulsivity, sleep and appetite. Although a large proportion is produced in the gastrointestinal tract, the effects on mood depend mainly on central circuits.
🔴 Cortisol
It is not a neurotransmitter, but an essential hormone in the stress response. In chronic excess, it can affect memory, immunity, metabolism and cardiovascular health.
Individually, each has its function, but these systems do not operate in isolation. They form integrated neurochemical networks that sustain our ability to decide, persist, learn, regulate emotions and adapt behaviour to context.
When these systems become imbalanced, they may contribute to conditions such as depression, anxiety, ADHD, substance dependence, insomnia, neurodegenerative diseases and even processes of neuronal excitotoxicity.
That is why sleep, nutrition, physical activity, chronic exposure to stress and even social relationships directly influence brain physiology.
🚨 Underestimating this is a frequent mistake of high-performance culture.
🧠 Mental health is also brain health
Another dangerous misconception is to treat psychological suffering as if it were separate from the brain.
As if depression, anxiety, burnout or cognitive alterations were merely matters of posture, willpower or discipline.
They are not.
As already discussed in a previous post, mood changes, loss of energy, difficulty focusing, rumination, impulsivity and sleep disturbances have real neurobiological correlations, involving neurotransmitters, cortico-limbic circuits, hormonal axes and even inflammatory mechanisms.
In examples such as the most common one, depression, alterations can be observed in circuits involving the prefrontal cortex, hippocampus, amygdala and networks linked to self-reference and rumination. Chronic stress, or burnout, can hyperactivate the HPA axis, increase cortisol release and compromise neuroplasticity mechanisms mediated by factors such as BDNF (brain-derived neurotrophic factor).
Fibromyalgia, which still suffers prejudice, is characterised by neurotransmitter imbalance (low serotonin, noradrenaline, dopamine – inhibitory neurotransmitters – and elevated substance P and glutamate – excitatory neurotransmitters) that causes central sensitisation and widespread chronic pain.
Unfortunately, the generalisation of a concept and the current level of misinformation are so high that mental health conditions become “common”. Another dangerous effect of this trivialisation is that the clinical concept stops serving understanding and care and starts being used almost as a form of belonging.
In some cases, the desire to be part of a group seems to come even before the willingness to understand what is really happening with the brain and mental health, and the issue no longer falls on the real diagnosis, but on the legitimate recognition or support of those who truly live with that condition.
The problem lies in turning serious themes from neuroscience and mental health into quick labels, ready-made identities or even social symbols, without depth and leaving, very often, people without proper treatment.
This helps explain why prolonged states of psychological suffering affect memory, energy, attention, decision-making and adaptive capacity, which also prolongs the individual’s emotional and physical suffering.
The human experience is never only biology.
But ignoring biology also impoverishes understanding.
💭 To impoverish understanding is to hide another person’s pain.
Taking care of mental health is also taking care of the real brain.
🌍 CONCLUSION: Less hype, more real brain
Perhaps the greatest challenge of our time is precisely this: talking about the brain without turning it into fashion, slogan or an empty performance tool. It is accepting that the media does not dictate our habits.
Because the brain is not hype.
It is not branding.
And it certainly no longer accepts a simple “go all in” without question.
🧠 The brain needs to be individualised, cared for, treated and nurtured.
It responds to neurochemical balance, sleep, context, experience, repetition, rest, emotion and care.
Our nervous system and the brain remain the same; there is no new way of interpreting them, but there is, indeed, a more responsible way of accepting them.
✨ Take care of yourself, treat yourself, nurture yourself, return to your roots.
⏳ The brain can indeed fall silent for minutes.
But, in some cases, minutes are enough to change an entire life.
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