Document Type : Review Article
Authors
1
Mobility Impairment Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
2
Student Research Committee, Babol University of Medical Sciences, Babol, Iran.
Abstract
The intricate bidirectional communication between the heart and brain, mediated by
autonomic, neural, and hemodynamic pathways, plays a pivotal role in neurovisceral
integration (NVI) and the regulation of cognitive and emotional processes in the brain. This
review synthesizes key mechanisms underlying this interaction, including cross-frequency
coupling (CFC), heart rate variability (HRV), and heartbeat-evoked responses (HERs). CFC
facilitates the synchronization of low-frequency cardiac rhythms with higher-frequency
brain oscillations, supporting cognitive functions such as memory, decision-making, and
emotional regulation. HERs, cortical responses synchronized with heartbeats, reflect the
brain’s integration of cardiac signals into interoceptive awareness and self-consciousness.
HRV emerges as a critical marker of autonomic balance, with higher HRV associated with
enhanced emotional resilience and cognitive performance. Additionally, pressure pulsatility
from each heartbeat influences brain activity via mechanosensitive channels like Piezo2,
linking cardiovascular dynamics to sensory processing and cognition. These mechanisms
collectively underscore the heart’s active role in shaping brain function and consciousness.
Abnormalities in these interactions are implicated in neuropsychiatric and
neurodegenerative disorders, including Alzheimer’s disease, anxiety, and depression,
highlighting their clinical relevance. Therapeutic interventions such as vagus nerve
stimulation (VNS), biofeedback, and mindfulness practices show promise in modulating
heart-brain coherence to improve mental and cardiovascular health. Despite significant
advances, limitations remain, including reliance on animal models, incomplete
understanding of precise mechanisms, and challenges in isolating heart-brain dynamics
from other influencing factors. Future research should focus on bridging these gaps to
unlock the full potential of heart-brain coupling for innovative healthcare solutions.
Keywords