Beta Rhythms | Lecture Note - Edubirdie

University:
The University Of Western Ontario
Course:
Pathology 3500B | Human Pathology
Academic year:

2023
Views:

491

Pages:

3
Author:

Kyuwon J.

Beta Rhythms ● Low-amplitude, high-frequency brain waves in EEG ● Could be seen during: ○ Alertness ○ Active thinking ○ Concentration ○ Mental activity ● Frequency range between 13-30Hz ○ Frontal beta rhythms ○ Widespread beta rhythm ○ Posterior beta rhythms / fast alpha variants ● Will disappear in drowsiness or sleep Description Frequency 13 – 30 Hz Amplitude Low Waveform Fast, irregular State Awake, alert Location Frontal and central regions Symmetry Usually symmetric Betawave occurrence ● ● ● ● ● ● Awakeness on normal wake brain activity Concentration, studying and problem solving Thinking Talking REM sleep Open eye - Alert state Brain State Brain Wave Deep sleep Delta Drowsy Theta Relaxed Alpha Alert Beta Beta I ● ● Beta II ● ● Cx ● Frequency 13-20Hz Relaxed thinking Frequency 20-30Hz Active thinking, anxiety When to see Beta Activity ○ Anxiety - Overactive thinking ○ Insomnia - Hyper-alert brain ○ Stress - Increase in CNS activity ○ Drug effect ■ Use of Benzodiazepine ■ Barbiturate use ● Decreased activity ○ Brain damage - lower brain activity ○ Learning disability - reduction in cortical activity ○ ADHD - low beta activity

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