Handbook of EEG interpretation - part 4 docx

... Abnormalities 87 FIGURE 4. 3. Absence (petit mal) seizure in an 8-year-old boy. D uring an absence seizure, the EEG demonstrates generalized, reg- ular, synchronous 3-Hz spike-and-wave discharges in the setting of ... figure. CHAPTER 4 98 GENERALIZED SEIZURES FIGURE 3.17. A burst of generalized 3.5-Hz spike-and-slow waves in JME. S pike-and-slow-wave complexes that have a repetition...

Ngày tải lên: 09/08/2014, 20:22

... absolute electrographic sites of maximal nega- tivity (or positivity) by phase reversals (Figure 1.3A). Normal EEG 7 Fp1-F7 F7-T3 T3-T5 T5-O1 Fp1-Ref F7-Ref T3-Ref T5-Ref O1-Ref AB FIGURE 1.7. Eye ... bibliographical references and index. ISBN-13: 97 8-1 -9 3386 4- 1 1-2 (pbk. : alk. paper) ISBN-10: 1-9 3386 4- 1 1-7 (pbk. : alk. paper) 1. Electroencephalography—Handbooks, man...

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... theta rhythm in an 18-year-old patient while awake. T heta rhythms are composed of 4- to 7-Hz frequencies of varying amplitude and morphologies. Approximately one-third of nor- mal awake, young ... voltages of >75 µV, while stage 4 consists of delta present for >50% of the recording. Normal EEG 37 Activation techniques are a useful part of EEG in clinical practic...

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... 1. 5- to 3.0-Hz delta in a 66-year-old man with encephalopathy that was unresponsive. The above example of EEG is rep- resentative of the entire record. No reactivity was noted during the EEG. C ontinuous ... of mild dif- fuse encephalopathy such as intermittent bursts of generalized theta or delta activity. Abnormal Nonepileptiform EEG 55 FIGURE 2 .4. An intermittent 4- se...

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... drowsiness and light non-REM sleep. A frequent ictal pat- tern of mesial temporal origin is the sudden appearance of localized or regional background attenuation, build-up of 4- to 7-Hz rhythmic activity, ... approach to electrophys- iology. J Clin Neurophysiol 2001;18(5) :44 2 45 5. Verma A, Radtke R. EEG of partial seizures. J Clin Neurophysiol 2006;23: 333–339. Westmoreland BF....

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... partialis continua in a 41 -year-old patient with sub- jective tingling and “twitching” noted at the corner of the left side of the mouth. Note the rhythmic delta frequencies on the EEG that phase reverse ... no significant change occurs in the C3-A2 channel. Consequently, contemporary PSG always include at least two EEG channels: C3-A2 or C4-A1 and O1-A2 or O2-A1. Many laboratory us...

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... FIGURE 6. 14. This is a 30-sec epoch demonstrating stage REM with fre- quent rapid eye movements (thin arrows), atonia (thick arrow), and mixed-fre- quency EEG (dashed arrow). S tage ... arrow). S tage REM is characterized by the appearance of low-amplitude, mixed-frequency EEG activity, EMG atonia, and rapid eye move- ments. EEG activity is similar to that seen in stage I sleep; .....

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... figure above, bursts of 3- and 4- Hz dis- charges ( arrows) were noted frequently during the PSG, particularly in light stages of sleep. Polysomnography 205 FIGURE 6 .43 . This is a 60-sec epoch demonstrating ... impedance mismatch between two elec- trodes and compromises the common mode rejection ratio of the dif- ferential amplifier. The result of this is presence of 60-Hz or...

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... The Report of an American Academy of Sleep Medicine Task Force. Sleep 199;22(5):667–689. Arand D, Bonnet M, Hurwitz T, et al. The clinical use of the MSLT and MWT. Sleep 22005;8(1):123– 144 . ASDA. EEG ... Intraoperative Monitoring 247 FIGURE 7 .4. Intraoperative BAEP monitoring showing loss of wave V dur- ing left CPA tumor dissection without return by the end of the surgery. T...

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... transients of sleep (BETS), 46 Benign variants of uncertain significance, 42 49 1 4- and 6-Hz positive bursts as, 45 6-Hz spike-and-wave burst as, 44 benign epileptiform transients of sleep (BETS) ... 122, 142 – 146 coma and, 132, 145 complex partial, 144 continuous spike-and-wave dis- charges (CSWS) in, 146 convulsive (CSE), 122 delta frequencies in, 142 electrical SE...

Ngày tải lên: 09/08/2014, 20:22