EEG waves

What was the first table based on?

EEG amplitude measurements

What was the second table based on?

EEG frequency measurements

What does EEG stand for?

Electroencephalogram

What conditions produced the lowest alpha activity?

Eyes closed due to the relaxation level is most relaxed

What is delta rhythm?

normal in infants, and sleeping adults but indicate brain damage in awake adults

What is theta rhythm?

normal in infants, and sleeping adults-- indicate stress in awake adults

What does theta waves in adults indicate?

severe emotional stress

What was the first table measured with?

standard deviation

What is the basic unit of neural integration?

synapse

What produces theta waves?

temporal and occipital lobes

What is desynchronization?

the difference between alpha and beta waves

What was the second table measured with?

the frequency (Hz)

What is a synapse?

the functional connection between the axon of one neuron and the dendrites or cell body of another neuron

What type of waves is common with newborn infants?

theta waves

What happens with the alpha levels if the subject is distracted?

they go down

What are packets of chemical transmitter substances?

vesicles

What is synchrony?

wave like patterns when the input is synchronized with electrical activity occurring at the same time.

What are the 4 types of EEG wavepatterns?

1. alpha wave 2. beta wave 3. theta wave 4. delta wave

What is an example of vesicles released?

Acetylcholine (ACh)

The amplitude measurements (Standard Deviation) are indicative of how much alpha activity is occurring. But, the amplitude values for beta don't truly reflect the amount of mental activity occurring with eyes open.

Beta waves can't truly reflect mental activity because it responds to visual stimuli. There is better concentration when eyes are closed.

What does it indicate if delta waves are produced while awake?

Brain damage

How can alpha waves be suppressed?

By opening eyes or doing mental arithmetic

What might account for the amplitude difference of waves recorded from a subject tested alone, in a darkened room, and subjects tested in a lab full of students?

In a dark room results would be more accurate because there is less distraction and she can concentrate only on the direction but in a class there is noise causing distraction

What are periodic waveforms?

It is identified by frequency and amplitude. Can be observed only after we input the region and regular electrical activity occurring at the same time.

What is regular waveforms?

It is observed when the brain has no input. Normal activity of the brain regions; no stimuli.

What does the EEG do?

It records the "brain wave"

How would the level of concentrations required affect the data?

It would increase the level of stimulation in the brain therefore creating many wavelengths on the EEG.

When were the alpha wave levels highest?

Mental arithmetic

When was the general amplitude of the EEG highest?

Mental arithmetic because the person is doing a lot of calculations in a short amount of time

what is hyperpolarization?

More negative inside the cell and positive outside

Does desynchronization of alpha rhythm occur when the eyes are open?

No, because when the eyes are open, alpha waves can't be observed.

What is an alpha block?

Occurs when amp of B rhythms is lower than A rhythms and the sum of electrical activity is less.

How do your results compare with information presented in the introduction?

Our results support the intro because the brain wave activity changes as in the intro.

What produces alpha waves?

Parietal and occipital lobes

How are alpha waves produced?

The subjects needs relaxed and wake but eyes are closed

What is the postsynaptic membrane?

The membrane of the second neuron

Did the subject need to concentration during the math problems?

Yes

Does the beta rhythm become more pronounced in the "eyes open" state?

Yes, because it occurs when individual are alert and attentive to the stimuli, also beta is provided in response to visual stimuli.

Is there an increase in delta and theta activity when the eyes are open?

Yes, there is an increase because delta and theta waves can occur briefly if a person is emotionally responsive during concentration ration.

What is alpha rhythm?

adults who are awake but relaxed with the eyes closed.

What type of response does an action potential get?

all-or-none

what is desynchronization also known as?

alpha block

What is beta rhythm?

awake, mental activity

How are beta waves produced?

caused by visual stimuli and mental activity

What produces delta waves?

cerebral cortex

increase alpha?

decrease beta

What is delta wave common in?

deep sleep

What does EPSP stand for?

excitatory postsynaptic potential

What produces beta waves?

frontal lobes

What kind of response does EPSP get?

graded response

What does IPSP produce?

hyperpolarization

decrease alpha?

increase beta

How does the depolaration level get determined with EPSP?

increase of the number of vesicles increases the depolaration level

What does IPSP stand for?

inhibitory postsynaptic potential

What happens when EPSP reaches depolaration (threshold)

it generates an action potential

What is the synaptic cleft?

it separates the 2 neurons