Researchers at the University of California, San Diego, have discovered that every human breath generates a unique electrical waveform in the brain that mirrors inhalation and exhale shapes. Published in The Journal of Neuroscience, the study reveals a precise, breath-by-breath coupling between respiration and neural activity.
Tracking Respiration Waveforms in the Brain
Scientists have long known that breathing influences mental states, but traditional research usually measured only basic breathing rate — how fast or slow a person inhales and exhales. A new approach changes that baseline. Researchers represented each breath as a wave-like pattern, mapping the rises and falls of airflow directly against electrical brain activity.
“Every single breath is different,” first author Eena Kosik-Rose, a PhD student in the University of California San Diego’s department of cognitive science, said. “You can pause your breathing for several seconds, take a super deep breath or have a shallow exhale. What we’re showing is that those differences in the shape of each breath are reflected in the shape of brain activity,” Kosik-Rose said.
Unlike simple volume or frequency metrics, this waveform technique captures subtle differences in timing, volume and shape from one breath to the next, the researchers said. The resulting respiratory curves correspond directly to widespread neural activity in brain areas that support emotion, motivation, pleasure, thinking, attention, and memory.
To uncover this level of detail, the research team relied on highly precise intracranial recordings from people undergoing epilepsy monitoring. Eena Kosik-Rose and Bradley Voytek, from the University of California, San Diego, led a study exploring this relationship by assessing how individual breaths at rest influence brain waves.
The study, titled Cycle-by-cycle respiration waveforms are coupled with the shape of neural oscillations, was published in the Journal of Neuroscience (DOI: 10.1523/JNEUROSCI.0731-26.2026). Bradley Voytek is a Professor and Department Chair of Cognitive Science and Professor in the Halıcıoğlu Data Science Institute and the Neurosciences Graduate Program at UC San Diego.
“Now that we know that there is this incredibly tight and rich coupling between the shape of each breath and the shape of each brainwave, there’s a whole new world of options that we can explore,” Voytek said.
Describing the nuance of this interaction, Kosik-Rose noted: Each breath you take has a fingerprint, so to speak, of impact on brain activity and mental state.
The Broader Rhythm of Brain and Body
The findings relate to an emerging body of research expanding the view that conscious experience is shaped through a continuous, rhythmic dialogue between the brain and body. In a new paper published in Neuroscience of Consciousness, a UCSB-led team gets to the heart of an enduring question: are you your brain or your body? Their answer points to what happens between them.
“The brain is not simply receiving messages from the body,” said Asa Young, the paper’s first author and a doctoral student in psychological and brain sciences professor Jonathan Schooler’s lab. “The heartbeat, breath and gastric rhythm are regular, predictable signals around which groups of neurons can organize, determining when they become more or less receptive to information. They are the drumbeats that keep our proverbial orchestra together.”
Photo: UC Santa Barbara
The heartbeat, lungs breathe and brain produce waves. Just as musicians coordinate while playing different parts, brain rhythms can become organized by slower bodily cycles, Young explained. People tend to inhale just before beginning the next trial of a cognitive task and exhale as they prepare to respond. Memory can also fluctuate with the breath: People are better at recognizing previously seen pictures when those pictures reappear during an inhale rather than an exhale. Frightening images can gain faster access to awareness while the heart is contracting, whereas neutral stimuli — including sights, sounds, touch and even pain — may be processed less strongly during that same phase.
What matters, then, may not be any one signal alone, but the relationship between them. Two people could have similar heart rates, for example, while differing substantially in how strongly cardiac signals influence brain activity. Measuring this relationship may reveal differences that neither signal shows on its own. The researchers note that the value of this coordination does not follow a simple “more is better” rule, as both unusually weak and unusually strong bodily influences on brain activity have been associated with adverse states. Healthy functioning may instead depend on the brain and body remaining coordinated within a Goldilocks zone.
Clinical Implications and Unresolved Questions
According to the researchers, this work suggests that beyond brain mechanisms, brain–body interactions may be important to consider when assessing and treating neuropsychiatric patient populations. However, the researchers emphasize that the current study does not establish a method for predicting SUDEP or SIDS. Instead, it provides a potential framework for future studies aimed at determining whether disruption of the normal breathing-brain relationship plays a role in these conditions.
Photo: UC San Diego Today
Because the current study relied on highly precise intracranial recordings from people undergoing epilepsy monitoring, the findings will also need to be tested using noninvasive methods and in broader populations. Speaking on future experimental plans, Voytek noted: “Humans have an incredible degree of voluntary control over breathing, allowing the normally automatic breathing rhythm to be consciously modified for things like talking and singing. We plan to assess whether controlling the shape of our breathing influences cognition and mental health.”
Sophie is a tech innovator and acclaimed tech writer recognized by the Online News Association. She translates the fast-paced world of technology, AI, and digital trends into compelling stories for readers of all backgrounds.
