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Re: EEG gamma rhythm and/or fractal EEG analysis
- To: Multiple recipients of list CLIN_NEUROPHYSIOL <CLIN_NEUROPHYSIOL@LISTSERV.UMU.SE>
- Subject: Re: EEG gamma rhythm and/or fractal EEG analysis
- From: John R Smale <jsmale@DIGITIMER.COM>
- Date: Fri, 26 Mar 1999 10:34:05 +0000
- Comments: Authenticated sender is <jsmale@[192.168.37.100]>
- Comments: cc: Erik Nordh <erik.nordh@NEURO.UMU.SE>
- In-Reply-To: <l03110700b320ee7b43f5@[130.239.183.202]>
- Organization: Digitimer Ltd. (UK)
- Priority: normal
- References: <Chameleon.990326065220.crosley@crosley.tcp.co.uk>
- Reply-To: Professional discussions of neurophysiology <CLIN_NEUROPHYSIOL@LISTSERV.UMU.SE>
- Sender: Professional discussions of neurophysiology <CLIN_NEUROPHYSIOL@LISTSERV.UMU.SE>
On 26 Mar 99 at 9:29, Erik Nordh wrote:
> ... where the question of EEG gamma rhythm
> studies was raised, one might notice that analyses of brain activity in the
> frequency range 50-60 Hz in a "clinical setting" are hampered by the not
> too uncommon problem of sine-wave interference from electric equipment etc
> in the surroundings. Even if fairly steep filters are being used there is
> always a risk of that the analyses are critically affected, either by the
> noise or by the cut-off properties of the filtering.
The NEW Quest Scientific "Hum Bug", whilst not a Medical Device, would overcome
the filtering problems. It uses the latest Digital Signal Processing techniques,
to remove mains synchronised interference, not filters.
Details are at www.digitimer.com\products\quest.htm
John Smale