03 Haziran 2022


It is the process of recording the electrical activities of the brain, done according to the internationally accepted mapping process in certain standards, in digital media or by printing on paper. The brain is in constant electrical activity, and this electrical activity shows significant levels of development at certain periods of life
Its electrical activity continues at certain levels at certain stages of daily life (eg sleep and wakefulness). For a health evaluation of the EEG, it is necessary to follow certain rules in the recording. The recording process is obtained by amplifying the signals obtained from electrodes placed on the scalp and earlobes in standard studies. A monopolar electrode is located on the earlobe, while the other electrode is located on the scalp. Enough time for recording with connections bipolar on the scalp
An application that opens the eye, and it is provocative practices. In provocation applications, routine applications, applications of intermittent photostimulation of different frequencies and applications of hyperventilation. Also when sound is needed and not much practiced at present, insulin stimulation practices can also be counted among the methods of induction. Sleep also has special effects on different phases of the electrical activities of the brain, besides recording spontaneous sleep and stimulated EEG, as well as
Other equipment is provided (with simultaneous eye movements, ECG, EMG, respiratory recordings) and all stages of sleep are recorded. Can study epilepsy ( polysomnography) in the absence of pathological findings in interictal circuits, long-term EEG monitoring and remote EEG monitoring for recording in daily life, can also find video simultaneous recordings to record clinical seizures along with changes in EEG application areas
What should be considered while performing an EEG?
The patient's age, gender, initial diagnosis, clinical information, drugs and doses used, the patient's condition during the imaging period (anxiety state, somnolence, coma, diazema, etc., state of cooperation, relationship with the environment) should be mentioned. In addition, eye opening and closing, photostimulation, hyperventilation, and cool postures (swallowing, licking, seizure, etc.)
After that, the assessment can be started and the next assessment done in order.
Is the background activity appropriate for the patient's age, current condition, medications, and disease? Is there a big difference between the previous recordings? This needs to be specified. (Exhibiting certain characteristics in certain age groups, drug use, sleep and regulation of background activity may be abnormal in some metabolic, inflammatory and degenerative diseases).Effect of eye opening on terrestrial activity (eye opening predominantly leads to voltage suppression of terrestrial activity). Presence or Asymmetry between the hemispheres (subdural hematoma, cerebral infarction, mass, sometimes may cause suppression and deceleration, and unilateral encephalitis can cause asymmetry in the form of deceleration
Presence of focal (punctual) and multifocal (multiple) abnormalities (may develop in structural, degenerative, metabolic, inflammatory, vascular and neurodermatological causes) Presence or absence of paroxysmal abnormalities, if present, prevalence, onset, end, type (can Occurs in epilepsy and if obtained is useful in epilepsy criteria) intermittent photostimulation (necessary in checking for light-sensitive activities) The effect of hyperventilation will be evaluated on
Trace EEG is useful for clinical and electrophysiological detection of some epilepsy. EEG is taken during sleep in infants and uncooperative children, and although the same evaluation criteria are used, except for hyperventilation and eye blinking, knowledge of EEG criteria for infants and sleep for Correctly performing the assessment will reduce false disease reporting or false normal results
The electroencephalogram was used mostly for epilepsy investigations. However, because seizures cannot always be detected clinically and the duration of EEG recording is limited, even if she has epilepsy, abnormal EEG findings in the interictal stages (between seizures) may not be observed, and this does not indicate that the condition is not epilepsy. And vice versa. Also true. Finding epilepsy activations on
An EEG in a person who is not having a clinical seizure does not necessarily indicate that the condition has epilepsy.
EEG acquires meaning in cases of epilepsy when clinical and EEG findings match, and is required in the follow-up of cases diagnosed with epilepsy. In addition, in cases of epilepsy, the detection of seizures on the electroencephalogram will help in the criteria of the case and in the choice of treatment.
In cases of epilepsy, focal or multifocal findings or asymmetry in the interictal circuits may be a sign of epileptic foci that require the exclusion of structural pathology. Electrical differentiation of the brain can be useful in the diagnosis and prediction of infection (herpes encephalitis, subicular sclerosing panencephalitis acute, Creutzfeldt-Jakob disease), toxic, metabolic
(hypoglycemia, hyperglycemia, hepatic encephalopathy, etc.), degenerative, hypoxic (heart- pulmonary failure, carbon monoxide poisoning) encephalopathy.In the differential diagnosis of epilepsy, in the investigation of sleep disorders, In some behavioral disorders, conditions such as enuresis and syncope, and in unexplained recurrent clinical cases that are resistant to treatment (treatment-resistant episodes of tachycardia, episodes of abdominal pain, children's cramp mimicking abdominal pain, etc.) an electroencephalogram may be used.