EEG card set -8-NORMAL WAKE PATTERNS

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mu

7-11Hz ALPHA - Central / parietal(c3-c4) - not attenuated with eyes open - attenuate with lateral movement lije clinch fist

POSTERIOR SLOW WAVE OF YOUTH

8 - 14 yrs old - seen up to 20yrs - single, random , irregular Theta / Delta - AMP= moderate and variable - can be intermixed with Alpha

ROLANDIC SPIKES

Central /Temporal - Self-limiting syndrome in healthy child - can progress to generalized seizures - considered normal

POSTS

Positive occipital sharp transients - sleep stage I & II - all ages - Theta wave occipital

VERTEX WAVES

Symmetrical - central region - max vertes in stage I - seen spontaneously or with stimuli

K-COMPLEXES

High voltage, bi phasic vertex slow wave and sleep spindles STAGE III

SPINDLES

short bursts of 12-14 Hz STAGE II - age 2-3 months - developmental mark - asynchronous up to 2 years

DROWSINESS

Alpha attenuation - rolling eyes - decreased EMG - decreased fg and increased duration Theta and Delta

HYPNOGOGIC HYPERSYNCHRONY

child ages up to adoles - hight voltage (100uv) - bilateral - some what varalble - max over central and frontal

BETA

14 Hz and faster - frontal / centeral - depressed over brain lession / burrholes / defects - effect from medication induced coma

LAMBADA WAVE

Single sharp transients - 4 to 6 Hz theta Occipital - Occurs in scanning, reading image and blocked with eyes closed

NORMAL VARIANTS 14 - 6

14 -6 CYCLES PER SEC. - early adolescence - posterior- Max in T5 - T6 referential ear- drowsy or stage I

3 Characteristics of a EEG waveform

Frequency - Amplitude - Location

BETS - epil transients of sleep

Referential montage, low voltage sharp waves - temporal and frontal - mimic ekg artifact

Fast Alpha variant

16 to 20 Hz - posterior - in wake - eyes closed - Attenuates eyes opening

EEG Frequence

Hz background rhythm

Beta

greater than 13 Hz

Alpha

8 to 13 Hz

Theta

3.5 to 7.5 Hz

Delta

3 Hz or less

Phantom spike-wave (6Hz)

low volt spike and wave - Posterior or midparietal - drowsy - stage I sleep

Rhythmic mid-tempral Theta

4 to 7 Hz Theta - temporal and central - drowsiness or relaxed wakefulness

shape of wave

symmetrical / asymmetrical

rhythm of wave

synchronous / asynchronous

sub-harmonic

Photic driving
can be seen as a frequency that is a
frequency equal to or an integral
submultiple of the photic frequency.

slow alpha variant

sub-harmonic posterior dominant 4.5 to 5 Hz - wake state - eyes closed / attenuates eyes open

Wicket spikes

sharp wave temporal - drowsyness or stage I sleep

normal wave form full term infant

trace' alternant - isolated frontal sharp waves - beta-delta complexes in quiet sleep

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