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Activation procedure

practice for EEG registry

QuestionAnswer
Why is sleep deprivation considered an activation procedure? hours of continuous waking time may stress a potentially epileptogenic grain so that abnormalities will appear in the waking EEG
What type of epilepsy is most likely to show abnormalities during sleep? Foci in the temporal lobes are especially likely to appear in sleep Sleep should be a routine procedure for patients who have or are suspected to have seizures of any type.
What is hyperventilation (HV) Deep and rapid breathing usually for a period of 3 to 4 minutes. Used as an activation procedure; especially potent in activating absence seizures.
What are the clinical effects of hyperventilation (HV) HV causes hypocapnia (decrease in co2 in the system) clinically characterized by cerebral system. symptoms include dizziness, loss of consciousness. tingling of hands, mouth and feet.
What electrographic changes are seen during hyperventilation (HV)? Normal responses consist of bilaterally synchronous slow waves called buildup abnormal spike and wave discharges of 3 hz.
What are the contraindications to hyperventilation acute stroke, recent intracranial hemorrhage, large vessel stenosis, recent TIA, severe cardiopulmonary disorders, sickle cell disease or trait or myomoya disease
Describe a photomyogenic response characterized by brief repetitive muscular spikes over the anterior region of the head, at the same frequency of the photic stimulation and stops when light stops.
Describe photic driving Consists of a train of occipital waves driven by a repetitive strobe flashes. Photic driving response measures the ability of the occipital lobe to follow a strobe flashes at varying frequencies with repetitive response. not response is normal
Describe phoparoxysmal (photobonvulsive response A photoproxysmal response is an abnormal response to intermittent photic stimulation eliciting generalized spike and wave discharges. may or may no sustain.
Created by: moeegtech