Table 1:

Examples of EEG Report sections from the TUH EEG Corpus (each section was taken from a different EEG report).

CLINICAL HISTORY: An elderly woman with change in mental status, waxing and waning mental status, COPD, morbid obesity, and markedly abnormal EEG. Digital EEG was done on XXXX XX, XXXX.

INTRODUCTION: The EEG was performed using the standard 10/20 electrode placement system with an EKG electrode and anterior temporal electrodes. The EEG was recorded during wakefulness and photic stimulation, as well as hyperventilation, activation procedures were performed.

MEDICATIONS: Keppra, Aricept, Senna, Aricept, ASA, famotidine

DESCRIPTION: In wakefulness, the background EEG is very low voltage, relatively featureless with some 10 Hz activity in the background and a posterior dominant rhythm, which may be estimated at 7 Hz. The patient seems to have very brief lapses into sleep with diffuse 10 to 13 Hz activity and then spontaneous arousals. This pattern is a beta spindle and then an arousal can be identified throughout the record. Later portions of the record seem to demonstrate more sustained sleep, but with ongoing eye movements. HR: 66 BPM.

IMPRESSION: Abnormal EEG due to:

1. Slow and disorganized background.

2. Left occipital sharp waves, at times becoming somewhat periodic in sleep.

3. Some additional epileptiform discharges with more of a mid to posterior temporal localization.

CLINICAL CORRELATION: This tracing raises the possibility of a mechanism for seizures outside of the area of the abscess described above. The photoparoxysmal response is unusual and may be accentuated by the previous surgery in the posterior brain regions.