Brain imaging techniques
One advantage to CT scans
Cost effective and fast
What does EEG measure?
measures brain waves
what is epilepsy?
it is when two or more recurring unprovoked seizures occur
What is a seizure?
a sensory, motor, cognitive, and affective disorder of abnormal electrical neuronal discharges in the brain
What is the acronym for electromyography?
EMG
One disadvantage to CT scans
exposure to ionizing radiation
Name the 5 main types of EEG brain waves
Gamma, beta, alpha, theta, delta
50% of the time, what causes epilepsy?
metabolic abnormalities, tumors, infarcts, infections, and trauma
How many type of seizures are there?
1. Partial seizures
2. Generalized seizures
What is EMG?
a visual record of muscular electrical activity during spontaneous or voluntary movement
One advantage to MRI
No hazardous radiation exposure
What does EEG primarily detect?
abnormal brain wave patterns
What is the remaining 50% of what causes epilepsy?
idiopathic(unknown) factors
Define a generalized seizure
continuous long seizure
What is EEG used to diagnose?
used to diagnose diseases of nerves or muscles
Best neuro imaging test that shows gray and white matter
MRI
placing electrodes on scalp
Regarding electrical activity in the brain, what disorder of the brain has unstable electrical activity?
epilepsy
Does a typical brain have unstable or stable electrical brain activity?
stable electrical activity
What does EMG measure?
CT scan is best used for?
to see swelling and fresh strokes
What does the Delta brain wave detect?
sleep and dreaming
How many percent of initial seizures occur before age 20?
70% to 75%
What percentage of seizures occur before age 4 or 5?
less than 30 percent
Does EMG record abnormal brain waves?
no