Grief is a universal yet deeply personal experience. When we lose someone dear, our entire world feels shaken. To better understand why this experience is so profoundly affecting, researcher Mary-Frances O’Connor, PhD, a psychologist and neuroscientist, dedicated her career to studying the science of grief. In her book The Grieving Brain: The Surprising Science of How We Learn from Love and Loss, she explores how the brain processes love, loss, and adaptation. Her research offers valuable insights into what happens inside the brain during grief — why it’s such a demanding process, yet one that gradually helps us heal.
This blog aims to translate her findings into accessible language and remind readers that, even in pain, grief is a natural process that requires patience and compassion.
Grief as the Brain’s Way of Learning
According to Dr. O’Connor, grief is not just emotional pain — it’s a learning process. The brain must literally relearn how to live without the person who has died.
In daily life, this can appear through automatic habits that are hard to unlearn: reaching for the phone to call a loved one, preparing two cups of coffee out of habit, or looking for a familiar face in a crowd. These reflexes show that the relationship still exists in the brain, even though reality has changed.
Dr. O’Connor uses a powerful metaphor — that of the phantom limb. Just as an amputee can still feel sensations in a missing arm, our minds continue to “feel” our relationship with the person who has passed away. Grief is the brain’s long process of integrating this absence into everyday life.
Grief and Depression: Two Different Realities
One of Dr. O’Connor’s key distinctions is between grief and depression.
- Grief is a reaction to a specific loss — the loss of a person. The pain is centered around that relationship.
- Depression, on the other hand, affects all areas of life. It alters how we see ourselves, the future, and the world around us.
Understanding this difference is crucial. It reminds us that deep sadness during grief is not necessarily a sign of illness — it’s part of a natural adaptation process.
The Brain and Emotional Bonds
Our relationships are encoded in the brain as a “we”, not just a “you” and a “me.”
When someone dies, that “we” is broken, and the brain — which was structured around that relationship — becomes destabilized.
The grieving process is the brain’s way of reorganizing this internal map: learning to live without the physical presence while keeping the emotional bond alive within.
When Grief Becomes Prolonged
Dr. O’Connor reminds us that most people eventually adapt to loss, even if the pain never fully disappears. However, for some, grief becomes prolonged and overwhelming.
This condition, known as Prolonged Grief Disorder, is marked by an inability to resume normal life, intrusive thoughts, and persistent pain months or even years after the loss.
There are validated therapies to help, including gradual exposure to memories and acceptance-based approaches.
Dr. O’Connor emphasizes that seeking help is not a sign of weakness — it’s a courageous step toward restarting the brain’s natural healing process.
Beyond the “Five Stages of Grief”
Many are familiar with Elisabeth Kübler-Ross’s model — denial, anger, bargaining, depression, acceptance. Dr. O’Connor warns against viewing these stages too rigidly.
Grief is not linear. It comes in waves: some days feel calm, others bring pain back to the surface, especially around anniversaries, holidays, or meaningful dates.
You might be interested in: How to grieve during the holiday season.
These emotional surges don’t mean we’re regressing — they’re simply part of how the brain continues to process loss.
Other Forms of Grief
Grief is not always tied to death. Dr. O’Connor identifies several variations that show its complexity:
- Ambiguous grief: when someone is physically or mentally absent (e.g., dementia, disappearance).
- Parasocial grief: sadness felt after the death of a celebrity or public figure who held personal meaning.
These examples remind us that grief, in all its forms, is a universal human experience.
How to Support Someone Who Is Grieving
Dr. O’Connor’s research also offers practical ways to comfort someone who is grieving:
- Be present — even in silence.
- Avoid clichés such as “time heals all wounds” or “stay strong.”
- Offer authenticity: listen, validate their pain, and show simple acts of kindness.
Grief is not something to go through alone. Often, it’s the quiet, genuine presences that make the greatest difference.
You might be interested in: How to Support Someone Who Is Grieving.
A Collective Experience
Dr. O’Connor also reminds us that grief is not only an individual experience. Some communities face greater losses — through war, pandemics, or social inequalities.
Recognizing grief as a collective and public health issue helps us better support those affected and create safe spaces to speak openly about loss.
Understanding to Heal
Grief is both a universal human experience and a complex neurological process.
Thanks to Dr. Mary-Frances O’Connor’s research, we now understand why the brain needs time to integrate absence — and why emotions can feel so overwhelming.
Even when the pain seems unbearable, it’s important to remember: the brain gradually learns to rebuild life around loss. And throughout that journey, every gesture of kindness and every human presence helps restore balance and hope.
