Normal Variants Flashcards
(25 cards)
What normal variant has an arch like/comb shaped and is found in the central and parietal regions?
Mu-rhythm
What normal variant is similar to mu rhythm but is found in the mid-temporal regions?
Wickets
True of false: Wickets are only seen in runs?
false. wickets can be in runs or independent
What normal variant are found in the mid-temporal regions, appear in drowsiness and have a frequency of 4-7hz?
R.M.T.D
What normal variant is similar to P.O.S.T.S but appears when awake?
LAMBDA
What normal variant are monophasic, low amplitude, and can look similar to epilepteform discharges?
B.E.T.S, also known as S.S.S
What normal variant appears mostly in adults 50 or older and have an abrupt onset, mostly seen in the temporal-parietal region?
S.R.E.D.A
What normal variant happens in light sleep, have negative arciform waveforms but positive sharp components found in the posterior temporal region?
14 and 6hz positive spikes
What are P.O.S.T.S
Posts are a normal variant seen in all stages of sleep, characterized as sail like wave forms found in the occipital leads
What is fast alpha?
when alpha frequency is seen at twice it’s frequency, seen in occipital leads
What is slow alpha?
when alpha frequency is seen as half its frequency, seen in occipital leads
(can be called theta slowing)
What normal variant has a small spike and large after going slow wave?
Phantom spike and wave
What happens to the Mu rhythm on an EEG when a person performs a motor activity or observes someone else performing an action?
mu rhythm
What normal variant goes away when a white sheet of paper if placed in front of the eyes?
Lambda
What state is phantom spike and wave seen?
relaxed wakefulness
What is the frequency of S.R.E.D.A
usually 1-2 hz to 5-6hz
What age group is phantom spike and wave seen?
Adolescents and adults
What state is fast alpha seen?
awake
What state is slow alpha seen?
awake
What age group is 14 and 6hz positive spikes seen?
adolescents 13-14 years old
What age group are wickets usually seen?
Adults over 30
What is the state of patient is b.e.t.s are seen?
seen in drowsiness or stage 1/2 sleep
What are the four normal variants seen in sleep?
vertex waves, posts, k complexes, and sleep spindles
In what stage of sleep are p.o.s.t.s found?
stage 1 sleep
