Understanding Your Brain: Why We Sometimes Flip Our Lid
Dr Dan Siegel's Hand Model of the Brain
Have you ever reacted to something in the heat of the moment, only to wonder afterwards, "Why did I say that?" or "Why did I get so upset over something so small?"
Perhaps you've found yourself becoming defensive, snapping at someone you love, withdrawing from a conversation, or feeling so overwhelmed that you simply couldn't think clearly.
These experiences are part of being human. Understanding what happens in our brain during moments of emotional distress can help us develop greater awareness, patience and emotional regulation.
Psychiatrist Dr Dan Siegel developed a wonderfully simple way of explaining this through his Hand Model of the Brain.
When we're emotionally overwhelmed, our brain may become more focused on detecting and responding to a perceived threat.
We might notice ourselves:
• Becoming defensive or argumentative.
• Reacting with anger, frustration or anxiety.
• Saying things we later regret.
• Shutting down or withdrawing emotionally.
• Struggling to listen or understand another person's perspective.
• Finding it difficult to think clearly or solve problems.
Our capacity for thoughtful decision-making hasn't disappeared, but it can become much harder to access.
And importantly, a threat doesn't always mean physical danger. Feeling criticised, rejected, misunderstood, dismissed or disconnected can also activate powerful emotional responses.
Watch Dr Dan Siegel Explain the Hand Model of the Brain
In this short video, Dr Siegel demonstrates how the different parts of our brain work together and what happens when we become emotionally overwhelmed.
As you watch, consider whether you recognise moments when you've "flipped your lid" and how that may have affected your interactions with others.
Why This Matters in Our Relationships
One of the most helpful things about understanding the Hand Model is recognising that emotional reactions often happen before we've had time to think things through.
Imagine your partner says something that you interpret as criticism.
You might immediately feel hurt, inadequate or misunderstood. Before you've had time to explore those feelings, you respond defensively.
Your partner then feels unheard and becomes frustrated.
Within moments, you're both caught in an argument that neither of you intended.
This is where understanding our emotional responses becomes particularly valuable.
We can begin to recognise that beneath our reactions are often emotions, needs and vulnerabilities that deserve our attention.
Rather than focusing only on what someone said or did, we can become curious about what was happening emotionally.
Learning to Recognise Your Warning Signs
Emotional regulation doesn't mean suppressing feelings or never becoming upset.
It means developing the awareness and skills to recognise what we're experiencing and respond in ways that are helpful rather than harmful.
Start by noticing the early signs that you're becoming overwhelmed.
You might experience a tightening in your chest, tension in your shoulders, a racing heart, an urge to defend yourself, or a strong desire to escape a conversation.
These physical sensations can be valuable signals.
Ask yourself:
• What am I feeling right now?
• What happened just before I started feeling this way?
• Am I feeling hurt, frightened, rejected, frustrated or misunderstood?
• What might I need in this moment?
• What would help me respond rather than react?
Sometimes, simply learning to name an emotion can create a little space between what we're feeling and what we do next.
How Do We Bring Our Lid Back Down?
When emotions become intense, trying to reason our way through them isn't always the most helpful first step.
We may need to settle our nervous system before returning to the conversation or problem.
A few helpful strategies include:
Pause: Give yourself permission to stop before responding.
Slow your breathing: Gentle, comfortable breathing can help your body begin to settle.
Name the emotion: Try identifying what you're actually feeling beneath the immediate reaction.
Take a break: If a conversation becomes overwhelming, agree to return to it when you're both calmer.
Practise self-compassion: Recognise that having strong emotions is human, while still taking responsibility for how you express them.
Reconnect: When you're calmer, return to the conversation with curiosity and a willingness to listen.
The aim isn't to avoid difficult emotions. It's to learn how to experience them without allowing them to dictate our behaviour.
Building Emotional Awareness, One Moment at a Time
One of the most encouraging things about our brain is its capacity to learn and change.
Through repeated practice, we can strengthen our ability to recognise emotional triggers, manage distress, communicate our needs and respond more thoughtfully.
We won't always get it right.
There will still be moments when we become overwhelmed, defensive or reactive.
But each moment of awareness creates an opportunity to learn something about ourselves.
The goal isn't to never flip our lid. It's to recognise when it's happening, understand what we need, and learn how to find our way back.
And in our relationships, that awareness can make a meaningful difference.
Understanding ourselves is often the first step towards understanding each other.
Reference
Dr Daniel J. Siegel, psychiatrist, author and developer of the Hand Model of the Brain.
The Hand Model of the Brain is an educational metaphor designed to help explain emotional regulation. It simplifies complex brain processes rather than representing a literal account of how the brain operates.
