From: peterson_at_d...
Date: 2001-07-27 04:20:31
On electrodes--My preference is still for the Ag-AgCl Grass cups.
A friend bought a BrainMaster and asked me to help her set it up on a
laptop computer, and as a result I've had a chance to examine
Collura's Flextrodes. They have unshielded leads, and in fact are
actually gold plated Grass cup electrodes, each with an added hollow
plastic disk on the end that holds the Grass cup and a piece of
rolled up felt that is soaked in a conductive water-based solution.
They are attached to the trainee's head with a wide Velcro headband
that has holes punched in it to hold the disks, plus another band
that can be stretched over the crown of the head from side to side to
hold the electrodes at sites above the headband. We actually had
trouble getting them to work right, and ended up just using the plain
cup electrodes with 10-20 paste to stick them onto the scalp.
Overall, I liked the BrainMaster a lot, although I didn't have a
chance to fully explore its capabilities. I was impressed by how
easy it was to install on the laptop. Coincidentally, a day or so
after setting up the Brainmaster I had to set up one of my Lexicor 2-
Ds on a new machine. I have set up Lexicors many times in the past,
but it has been a while, so I had somewhat forgotten what a pain it
is to get a Lexicor to run. It won't work at all on some machines.
We've never had any luck getting one to work with a true IBM, either
laptop or desktop, '486 or Pentium. Compaqs also don't seem to work.
In fact, I once spent a lot of time trying to get a Lexicor machine
to run on a Compaq laptop with a Pentium 150 MMX chip and Win 98. It
didn't work with Win 95 on that machine either. This laptop was the
exact same machine I set the BrainMaster up on, and it ran without a
hitch.
--Jim Peterson
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:31 BST