Biến thể lành tính này có ý nghĩa không chắc chắn có hình thái của một cành, mặc dù nó có một chi nhanh chóng tăng dần và chi xuống dốc tốt nhất nhìn thấy trước từ giữa thời gian trong giấc ngủ không REM. Họ là phổ biến nhất ở người lớn. | CHAPTER 1 FIGURE . A right benign epileptiform transients of sleep BETS in the temporal region during stage 2 sleep. Note the higher amplitude in the T1 and T2 channel with a longer interelectrode distance. Different terms describe the small sharp spikes. or benign epileptiform transients of sleep or benign sporadic sleep spikes of sleep that depict a low-voltage 50 pV brief-duration 50 msec simple waveform with a monophasic or diphasic spike. This benign variant of uncertain significance has the morphology of a spike although it has an rapidly ascending limb and steep descending limb best seen in the anterior to mid-temporal derivations during non-REM sleep. They are most common in adults. They may be 50 pV have a duration 50 msec and may appear with an aftergoing slow-wave usually of lower amplitude than the spike . They are not associated with focal slowing. They do not occur in runs. The most distinguishing characteristic is that they disappear in slow-wave sleep. They appear as a unilateral discharge but are almost always independent when they are bilateral. They may possess a field that may correspond to an oblique transverse dipole resulting in opposite polarities over opposite hemispheres when they are bilateral. 46 Normal EEG FIGURE . Wicket waves maximal at T3 and T4. Wicket spikes are most commonly seen in adults 30 years of age. They occur within the 6- to 11-Hz band and can obtain amplitudes of up to 200 pV. They are seen over the temporal regions during drowsiness and light sleep and are usually bilateral and independent. They typically occur in bursts although they may be confused with interictal epileptiform discharges especially when they occur independently or as isolated waveforms. No focal slowing or aftergoing slow-wave component is seen and they likely represent fragmented temporal alpha activity. Similar frequency and morphology of bursts to the isolated waveforms is a means of providing support for the nonepileptogenic origin. Wicket
