What is meant by 10-20 electrode placement system?
What is meant by 10-20 electrode placement system?
The 10-20 System of Electrode Placement is a method used to describe the location of scalp electrodes. These scalp electrodes are used to record the electroencephalogram (EEG) using a machine called an electroencephalograph. The EEG is a record of brain activity.
Where do electrodes go for ECT?
Depending on the location of the electrodes, ECT is defined as bilateral or uni- lateral. In bilateral ECT, one electrode is placed on the left side of the head, the other on the right side. In unilateral ECT, one electrode is placed at the top (vertex) of the head and the other typically on the right side.
What does F in 10-20 electrode system of EEG?
Electrodes are identified with labels: the letters correspond to cortical locations: frontal (F), temporal (T), parietal (P), occipital (O), central (C) and combinations of these to indicate intermediate locations (Fp means frontal polar and corresponds to the anterior pre-frontal lobe).
How many electrodes are used in ECT?
Few differences among the four modern ECT electrode placements have been proven. When study comparisons showed a large difference, the placement with lower efficacy (and side effects) was generally used at much weaker stimulus dosage.
How do you measure a 10-20 electrode?
The T3, C3, Cz, C4, and T4 electrodes are placed at marks made at intervals of 10%, 20%, 20%, 20%, 20% and 10%, respectively, measured across the top of the head. Skull circumference is measured just above the ears (T3 and T4), just above the bridge of the nose (at Fpz), and just above the occipital point (at Oz).
How do you perform ECT?
When you’re asleep from the anesthetic and your muscles are relaxed, the doctor presses a button on the ECT machine. This causes a small amount of electric current to pass through the electrodes to your brain, producing a seizure that usually lasts less than 60 seconds.
How much current is used in ECT?
Typically, the electrical stimulus used in ECT is about 800 milliamps and has up to several hundred watts, and the current flows for between one and six seconds.
What are the two types of ECT?
There are 2 types of ECT.
- Bilateral ECT. This is when the current is passed through both sides of your head.
- Unilateral ECT. This is when the current is only on one side of your head.
Where is the reference electrode placed in EEG?
The reference lead is the lead that connects the reference electrode; in EEG recordings, this electrode is usually placed at the ear or, in the case of “summed ears,” to a pair of electrodes, one at each ear.
