A single, complete cycle of contraction and relaxation.
The frequency of these beats over a specific period, typically measured in beats per minute (BPM) . heartbeat 1
For a healthy adult at rest, a normal heart rate typically ranges between . This rate is dynamic and adjusts based on factors such as physical activity, stress, and emotions like fear, which triggers the release of adrenaline . Interoception: Perceiving the Pulse A single, complete cycle of contraction and relaxation
This "heart-brain" connection is vital for mental health and emotional processing. For instance, a mismatch between the brain's predicted heartbeat and the actual sensation—often occurring during irregular beats or extrasystoles —can trigger feelings of anxiety. Modern Monitoring and Clinical Significance This rate is dynamic and adjusts based on
The ability to sense one's own heartbeat is a key dimension of , the sensing of internal bodily signals. Recent research has shown that heartbeat perception is causally linked to frontal brain activity, specifically delta oscillations. Studies from Nature suggest that enhancing these brain oscillations can actually suppress the accuracy of heartbeat detection.
The familiar "lub-dub" sound heard through a stethoscope is produced by the closing of the heart valves during these phases. Heartbeat vs. Heart Rate