Aivosignaaleilla

Aivosignaaleilla, also known as brainwaves or electroencephalography (EEG) signals, are electrical signals generated by the brain. These signals are recorded using EEG, a non-invasive method that measures voltage fluctuations resulting from ionic current flows within the neurons of the brain. EEG signals are typically categorized into different frequency bands, each associated with specific brain activities and states. The most common bands are:

Delta (0.5-4 Hz): Associated with deep sleep and unconscious states.

Theta (4-8 Hz): Linked to light sleep, meditation, and drowsiness.

Alpha (8-12 Hz): Characteristic of relaxed, awake states, often seen when the eyes are closed.

Beta (12-30 Hz): Indicative of active, alert, and focused mental states.

Gamma (30-100 Hz): Associated with higher cognitive functions, such as perception, memory, and consciousness.

EEG signals have various applications in neuroscience, medicine, and technology. In neuroscience, they are used to study brain function and dysfunction. In medicine, EEG is employed to diagnose and monitor neurological conditions, such as epilepsy and sleep disorders. In technology, EEG signals are utilized in brain-computer interfaces (BCIs) to enable direct communication between the brain and external devices, such as computers or prosthetics.

Despite its widespread use, EEG has limitations, including low spatial resolution and susceptibility to artifacts from muscle activity and external interference. Advances in signal processing and machine learning are continually improving the accuracy and reliability of EEG-based technologies.