Handbook of EEG interpretation - part 10 pdf

... 97,98 105 absence, 99 101 generalized tonic-clonic (GTC), 103 infantile spasms, 104 myoclonic, 102 polyspike-and-wave in, 98recruiting rhythm in, 103 spike wave in, 98tonic seizure, 105 Generalized ... transients of sleep (BETS), 46Benign variants of uncertain significance, 42–491 4- and 6-Hz positive bursts as,456-Hz spike-and-wave burst as, 44benign epileptiform transients of sleep (BETS) ... 197, 198 6- and 14-Hz positive bursts, 456-Hz spike-and-wave burst, 4460-cycle artifact, 22Sleep, 2, 35–38, 149. See alsopolysomnographyabsence seizures in, 99 101 alpha, 35alpha-delta pattern...

... theta rhythm in an 18-year-old patientwhile awake.Theta rhythms are composed of 4- to 7-Hz frequencies of varyingamplitude and morphologies. Approximately one-third of nor-mal awake, young ... distribution, waveform fre-quency, polarity, and morphology.The state of wakefulness and age are critical fea-tures for accurate interpretation of the normal EEG. FIGURE 1.22. Normal 1 0- Hz alpha rhythm ... movements, loss of mus-cle tone, and saw-toothed waves in the EEG (Figure 1 .10) . Non-REM and REM sleep alternate in cycles four to six times during anormal night’s sleep. A predominance of non-REM appears...

... [11]): 20 g of potassium ferricyanide is dis-solved in 500 mL of 1/15 M phosphate bu er solution (pH 7.1), followed by the addition of 50 mg potassium cyanide and 100 mL of 1% Triton X -1 00 (obtainable ... liberation of CO can occur [10] ; at –30° C, slight production of Met-Hb is obtained, but no changes in values of COHb and the total Hb for at least 60 days. At –80° C, no production of Met-Hb and ... spectra of reduced Hb (1) and COHb (2) in the presence of NaOH.95 Chemical Industries, Ltd.) is diluted 1 0- fold.  e whole blood to be analyzed should be vortex-mixed before use; 20 µL of whole...

... absolute electrographic sites of maximal nega-tivity (or positivity) by phase reversals (Figure 1.3A). Normal EEG 7Fp1-F7F7-T3T3-T5T5-O1Fp1-RefF7-RefT3-RefT5-RefO1-RefABFIGURE 1.7. Eye ... bibliographical references and index.ISBN-13: 97 8-1 -9 3386 4-1 1-2 (pbk. : alk. paper)ISBN -1 0: 1-9 3386 4-1 1-7 (pbk. : alk. paper)1. Electroencephalography—Handbooks, manuals, etc. I. Tatum, William ... interpretation of one’s “brainwaves.” Wehave written Handbook of EEG Interpretation to fit into the lab coatpockets of all health care professionals who need access to quick, reli-able EEG...

... 1. 5- to 3.0-Hz delta in a 66-year-old manwith encephalopathy that was unresponsive. The above example of EEG is rep-resentative of the entire record. No reactivity was noted during the EEG. Continuous ... diffuse slowing of thebackground rhythm. In general, the state of the patient is the bestindicator of abnormality with some low-voltage EEGs of < ;10 to 20µV found in a subset of normal individuals. ... Nonepileptiform EEG 63ADDITIONAL RESOURCESAbou-Knalil B, Misulis KE. Atlas of EEG and Seizure Semiology. ButterworthHeinemann, Philadelphia, 2006:1–213.Benbadis SR, Tatum WO. Overinterpretation of EEGs...

... burst of generalized 3.5-Hz spike-and-slow waves in JME.Spike-and-slow-wave complexes that have a repetition rate of >3Hz are referred to as fast GSW. JME is the most common idio-pathic ... (petit mal) seizure in an 8-year-old boy.During an absence seizure, the EEG demonstrates generalized, reg-ular, synchronous 3-Hz spike-and-wave discharges in the setting of waking or drowsy background ... thegeneralized discharge in the majority of cases.CHAPTER 390FIGURE 3.20. Slow-spike-and-wave in a patient with Lennox-Gastaut syndrome.Slow-spike(or sharp)-and-wave discharges (SSW) are <3...

... drowsiness and light non-REM sleep. A frequent ictal pat-tern of mesial temporal origin is the sudden appearance of localizedor regional background attenuation, build-up of 4- to 7-Hz rhythmicactivity, ... features.FIGURE 4 .10. The above EEG shows a simple partial seizure that occurredout of stage 2 sleep.Simple partial seizures are partial seizures that do not involveimpairment of consciousness ... tracing shows high-frequency, mu-like arcuate wave-forms focally over the left parietal C3-P3 derivations at 10 Hz in the region of a brain tumor. Parietal lobe seizures are often clinically...

... stages III and IV areexpressed together as slow-wave (or delta) sleep. FIGURE 6 .10. This is a 1 0- sec epoch of stage II; it is the last 10 sec of theprevious sample.This sample is displayed ... it is often use-ful to change the paper speed from 10 mm/sec to 30 mm/sec for bet-ter identification of sleep spindles. CHAPTER 6160FIGURE 5.13. BiPLEDs in a 37-year-old HIV-positive man ... 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...