Research shows that the heart actually sends signals to the brain, and these signals have a significant effect on brain function as it also influences emotional processing that leads to higher cognitive performance in attention, perception, memory, and problem-solving.
It has been demonstrated that the patterns of the heart activity have distinct effects on the emotional and cognitive functions.
When someone is stressed or have negative emotions, the heart rhythm pattern is erratic, which leads to limited ability to think clearly, remember, learn, reason, and make effective decisions.
The more ordered and stable the pattern of the heart's rhythm, the more the brain has cognitive order and it reinforces emotional stability and positive feelings.
In short, by increasing the heart rhythm coherence and sustaining positive emotions, it benefits the entire body, affecting how we think, feel, perceive, and perform.