topic 11 - EEG Flashcards
what are the frequencies of brain waves
beta wave = >13 Hz (14-30)
alpha wave = 8-13 Hz
theta wave = 4-7.5 Hz
delta wave = 1-3.5 Hz (slowest)
what do beta waves do
AWAKE
involved in conscious and logical thought progressions, and tend to have a stimulating effect
what do different levels of beta waves mean
optimal level
- focus on task - related to conscious focus, memory, and problem solving
increases
- higher levels of anxiety, stress, and arousal, and inability to relax
suppression
- lack of concentration, daydreaming, depression, and poor cognition
what do alpha waves do
AWAKE BUT NOT FOCUSSED
- help us calm down when necessary and promote feelings of deep relaxation
- found in daydreaming, inability to focus and being very relaxed (calm meditative state)
what do different levels of alpha waves mean
optimal levels
- comfortable and relaxed
suppressed
- higher levels of anxiety, stress, and insomnia
less present following concussion
what do theta waves do
AWAKE OR EARLY SLEEP (most prominent when asleep)
help improve intuition and creativity and making us feel more natural
associated with daydreaming and sleep
what do different levels of theta waves mean
optimal levels
- creativity, emotional connection, intuition, and relaxation
awake
- depression, impulsivity, and inattentiveness
suppressed
- anxiety, poor emotional awareness, and stress
what do delta waves do
DEEP SLEEP
deepest levels of relaxation and restorative, healing sleep
what do different levels of delta waves mean
optimal levels
- feel completely rejuvenated and promotes the immune system, natural healing, and restorative / deep sleep
suppressed
- inability to rejuvenate the body and revitalise the brain and poor sleep
what is the effect of not enough delta waves
cumulative effects
less healing
free radicals stay present (don’t get flushed out)
