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Epileptic Disorders

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Assessing quantitative EEG spectrograms to identify non-epileptic events Volume 19, issue 3, September 2017

Figure 1

Specificities and sensitivities of QEEG spectrograms for detecting non-epileptic events.

Figure 2

Quantitative EEG and raw EEG representation of various clinical manifestations in the non-epileptic patients. (A) Raw EEG (left) showing quasi-rhythmic discharge over the central head regions; quantitative EEG (right) showing positive seizure detection; clinically, rhythmic head jerking is evident. (B) Raw EEG (left) showing overlying muscle and movement artefacts; quantitative EEG (right) remains normal throughout; clinically, non-rhythmic whole-body jerking is evident. (C) Raw EEG (left) showing overlying muscle artefact; quantitative EEG (right) remains normal throughout; clinically, whole-body stiffening with some jerking is evident. (D) Raw EEG (left) showing overlying muscle artefact; quantitative EEG (right) remains normal throughout; clinically, whole-body tonic posturing is evident.