Asymmetrical recording from a 3 week old 28 week neonate with an extensive unilateral subpial haemorrhage (confirmed at autopsy). Periods of higher amplitude correspond to times during which the comb-like EEG waves seen above are occurring
There is 50Hz interference particularly on the right This is filtered from the EEG and is outside the range of frequencies used for amplitude-frequency analysis.
SOURCE: Dr Marianne Thoresen, copyright retained.
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