Atlas of Ambulatory EEG
Comprehensive Epilepsy Center Beth Israel Deaconess Medical Center Boston, Massachusetts Comprehensive Epilepsy Center Beth Israel Deaconess Medical Center Boston, Massachusetts Comprehensive Epilepsy Center Beth Israel Deaconess Medical Center Boston, Massachusetts 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA 525 B Street, Suite 1900, San Diego, California 92101-4495, USA 84 Theobald's Road, London WC1X 8RR, UK This book is printed on acid-free paper. Copyright 2005, Elsevier Inc....
Bifrontal SpikeWave Complexes Recorded by Spike Detection Algorithm
In this excerpt, frequent bifrontal spike-wave discharges are captured by the spike detection algorithm, with several files recorded here within just a few minutes' time. JG16 C SPKSAHPS JG16 SPICT0000.WTV 09 14 1993 11 39 EBK 10067 Es9 H 2 C 12 X 2 Gainai -60 3 DigiTrace Care Services Inc. Boston,MA P.01 VVWWv Bi-frontal Spike Wave Complexes . 30 sec page JWy 23 18 46 - 23 35 15 JG16 C SPKSAHPS JG16 SPICT0000.WTV 09 14 1993 11 39 EBK 10067 20 50 23 20 53 23 21 14 23 21 15 23 21 18 23 21 31
Chewing Artifact
Chewing artifact can often have rhythmic features and at times may resemble ictal activity. Here, artifact begins at 21 59 35 and is characterized by the rhythmic appearance of muscle artifact centered mostly over the temporal regions bilaterally. ICH1OH C KH10M MCSRPB01.WTV 09 17 1993 21 58 LJR E-22,C-01,18-24 X 1 Gain 1 -60 3 DigiTrace Care Services Inc. Boston,MA P.13 ICH1OH C KH10M MCSRPB01.WTV 09 17 1993 21 58 LJR E-22,C-01,18-24 X 1 Gain 1 -60 3 DigiTrace Care Services Inc. Boston,MA P.13
Rolandic Spikes
In this excerpt, several independent bilateral centrotemporal Rolandic spikes can be seen phase-reversing at the C3 and C4 electrodes. In the same channels, a sleep spindle is seen beginning at 04 25 08. KHIOM C KH10M SZRF0002.WTV 09 17 1993 04 25 LJR 40037 -22,0-01,18-24 X 1 Gain 1 -60 3 DigiTrace Care Services Inc. Boston,MA P.01 KHIOM C KH10M SZRF0002.WTV 09 17 1993 04 25 LJR 40037 -22,0-01,18-24 X 1 Gain 1 -60 3 DigiTrace Care Services Inc. Boston,MA P.01
DExamination for Subclinical Seizures
Some seizures recorded during prolonged EEG monitoring may be asymptomatic or subclinical. Many such seizures can occur during sleep and are not noted by patients or observers. Some patients whose seizures are thought to be under good control on medication actually have frequent subclinical seizures. It is unclear that these seizures are actually subclinical i.e., such electrographic seizures may have some immediate or even long-term clinical consequence , but this is still controversial. Some...
Sleep Spindles
The electroencephalographer reviewing ambulatory EEG recordings must become familiar with standard sleep morphologies and their appearance on ambulatory EEG. In this excerpt, a symmetric sleep spindle is seen at 22 02 54. AMM C LSP001APEDIEX AMM SZRF0022.WTV 07 26 1993 22 03 G.M. 93324-A C 55,W 57,E 111 X 2 Gain 1 -60 3 DigiTrace Care Services Inc. BostontMA P.01 AMM C LSP001APEDIEX AMM SZRF0022.WTV 07 26 1993 22 03 G.M. 93324-A C 55,W 57,E 111 X 2 Gain 1 -60 3 DigiTrace Care Services Inc....
Abnormal Epileptiform Activity
Epileptiform 1. Focal Mesial Temporal Spikes Recorded by Spike Detection Algorithm 78 Epileptiform 2. Focal Anterior Temporal Spikes Recorded by Spike Detection Algorithm 80 Epileptiform 3. Bifrontal Spike-Wave Complexes Recorded by Spike Detection Algorithm 82 Epileptiform 4. Rolandic Spikes 84 Epileptiform 5. Three-Per-Second Spike-and-Wave Activity Recorded by Spike Detection Algorithm 86 Epileptiform 6A. Generalized Spike-and-Wave Activity Recorded by Seizure Detection Algorithm Page 1 of 2...
Ambulatory Artifacts
Artifacts 1. Horizontal Eye Movement and Blink Artifacts 56 Artifacts 2. Eye-Blink Artifact 58 Artifacts 3. Eye Flutter Artifact Recorded by Seizure Detection Algorithm 60 Artifacts 4. Electrode Tapping Artifact 62 Artifacts 5. Jaw-Clenching Artifact 64 Artifacts 6. Chewing Artifact 66 Artifacts 7. Chewing Artifact Recorded by Spike Detection Algorithm 68 Artifacts 8. Dry Electrode Artifact 70 Artifacts 9. Forehead Rubbing Artifact 72 Artifacts 10. Pulse Artifact 74