The science of dreams, lucid dreaming and nightmares

We spend roughly a third of our lives dreaming, and according to neurosurgeon and neuroscientist Dr. Rahul Jandial, that time is anything but wasted. In a conversation on the Mel Robbins podcast, he explains that dreaming is essential to the human mind, not an accidental byproduct. With a few simple practices you can remember your dreams, shape their direction, and use your dreaming brain to think, create and heal in ways your waking brain cannot. None of it requires special equipment, only attention and a little patience.

Why dreaming matters

During the day your brain activates only the concepts and neural circuits you need to get to work, get the kids to school and navigate ordinary life. At night, the neurons and ideas you did not use get rehearsed and kept warm. Jandial suggests that without this nightly activation, some of those connections may become harder to access as you age, both as individuals and as a species. Dreaming, in other words, helps maintain the richness and reach of your mind over a lifetime.

The dreaming brain versus the executive brain

When you sleep, the executive brain, the inner CEO that keeps your day on track, steps back, and the imagination network comes online together with deep emotional structures. This is why dreams can process grief and loss that the waking mind pushes away. Jandial describes how lost loved ones often return in dreams in a pattern that mirrors how you are coping in real life. If you are the kind of person who refuses to break down during the day, the dreaming brain takes up the work your busy daytime self avoids, giving the emotional brain space to catch up.

Five kinds of dreams

Not every dream needs interpretation. Jandial sorts them into broad categories:

• Obvious dreams, where daytime anxiety rolls straight into the dream, such as showing up unprepared
• End of life dreams, which tend toward reconciliation rather than doom
• Pregnancy dreams, which show recurring themes in surveys of expectant mothers
• Random dreams that carry no message and do not need decoding

He also notes that as the brain ages or declines, dreams can shift toward animals and beasts, oddly mirroring the dreams young children report, as if the dreaming mind returns to an earlier, more primal state.

Nightmares as a signal

A nightmare is not simply a bad dream. By definition it is terrifying and it wakes you up. Jandial frames recurring nightmares as a wellness signal, a reminder that something may be off with your mental health. Rather than dreading them, you can rework them. Before bed, picture a kinder, happier ending to the nightmare and journal it. Rehearsing a better outcome while awake helps steer the dream itself, a gentle but powerful use of suggestion.

How to incubate a dream

One of the most exciting ideas is dream incubation at sleep entry. As you fall asleep, you can give your dreaming brain an assignment: a problem to solve, a decision to weigh, or a creative question to explore. Instead of digging for meaning after the fact, you use the third of your life spent dreaming proactively. Be patient, because it can take several nights before clear results appear, and resist the urge to force an answer.

Capture ideas on waking

The exit from sleep is just as valuable. In the 5 to 15 minutes when you drift between asleep and awake, the imagination network is still active before the executive brain takes over. Jandial keeps notes on his phone for exactly this window, because many of his best ideas arrive there. Keep a way to record thoughts within reach of your bed so you do not lose them.

A simple guide to lucid dreaming

Lucid dreaming means becoming aware that you are dreaming while still inside the dream. Jandial outlines an approachable method:

• Set an alarm for about 5 to 6 hours after you fall asleep
• Let it wake you a touch earlier than you naturally would, without waking fully
• Look for dream signs, such as clocks or hands that are imprecise or an extra finger
• Use the power of suggestion, repeating that you will fall back asleep and wake up inside the dream
• Drift back to sleep while holding that intention

How to remember your dreams

Recall is a trainable skill. Keep a dream journal by your bed and write down whatever you can as soon as you wake, staying still for a moment before the details fade. The more you practice, the more vivid and detailed your dream memory becomes, and the easier it is to spot the patterns worth paying attention to.

The bottom line

Your dreaming hours are a resource, not downtime. Use sleep entry to set an intention, use sleep exit to capture ideas, rework nightmares into kinder endings, and journal to sharpen recall. Treated with curiosity, the third of life you spend dreaming can add clarity, creativity and meaning to the two thirds you spend awake.