Types of Brain waves Delta, Theta, Alpha, Beta, Gamma waves
This page defines brain waves and mention different types of brain waves viz. Delta wave, Theta wave, Alpha wave, Beta wave and Gamma wave with their frequency values and amplitude curves.
What are Brain waves ?
It is produced by communication between neurons by electrical pulses based on our emotions, thoughts and behaviours. Brain waves are acquired using sensors placed on the scalp or within the scalp.
Normal brain function involves continuous electrical activity which can be recorded by EEG (Electroencephalogram). As mentioned patterns of neoronal electrical activity recorded are called brain waves. Brain waves are continuous train of peaks and troughs. They are expressed in units of Hertz (Hz).
Each person's brain waves are unique and they change with age, sensory stimuli, brain disease and chemical state of the person's body. The brain waves ranges specify different states of human mind from deep sleep to high arousal.
Types of Brain waves
The different types of brain waves are divided based on their frequencies and amplitude response as described below.
Brain wave types are infra low, delta wave, theta wave, alpha wave, beta wave and gamma wave.
Brain waves with frequencies lower than 0.5 Hz are known as infra-low brain waves. It is difficult to detect
infra-low brain waves due to its slow nature. Hence research studies are not much conducted on this brain wave.
Let us study other types of brain waves with their frequency and amplitude response.
Delta wave
➨Frequency range : From 0.5 Hz to 4 Hz
➨The amplitude curve is shown in the figure above.
➨It signifies deep sleep.
➨Healing and regeneration are stimulated in this state.
Theta wave
➨Frequency range : From 4 Hz to 8 Hz
➨The amplitude curve is shown in the figure above.
➨It signifies "drowsiness" i.e. first stage of sleep.
➨This brain wave type is our gateway to learning, memory and intuition.
Alpha wave
➨Frequency range : From 8 Hz to 14 Hz
➨The amplitude curve is shown in the figure above.
➨This brain wave type represent the overall coordination, calmness, alertness of mental state, mind
and body integration and learning.
Beta wave
➨Frequency range : From 14 Hz to 30 Hz
➨The amplitude curve is shown in the figure above.
➨It signifies highly alert and focused state of human being.
Gamma wave
➨Frequency range : From 38 Hz to 42 Hz
➨The amplitude curve is shown in the figure above.
➨It signifies fastest brain activity responsible for cognitive functioning, learning, memory
and information processing.
➨It is considered that gamma brain wave rhythms are responsible for modulated perception,
consciousness and spiritual emergence.
5G TECHNOLOGY RELATED LINKS
This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial
5G Frequency Bands
5G millimeter wave tutorial
5G mm wave frame
5G millimeter wave channel sounding
Difference between 4G and 5G
5G testing and test equipments
5G network architecture
5G NR Physical layer
5G NR MAC layer
5G NR RLC layer
5G NR PDCP layer
LoRaWAN related links
The LoRaWAN Wireless tutorial covers following sub topics:
LoRaWAN Smart Parking
LoRaWAN sensor design
LoRaWAN smart healthcare system
LoRaWAN smart water metering
LoRaWAN architecture
LoRaWAN Interface Types
LoRaWAN roaming types
LoRa tutorial
LoRa Frequency Bands
LoRa protocol stack
LoRa MAC layer
LoRaWAN classes
LoRa features
LoRa Transceiver module
What is Difference between
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM
Bluetooth vs zigbee
Fixed wimax vs mobile