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GALLERY I & II
21 May - 18 June 2005
THE TECHNOLOGY BEHIND THE “HEADBANG” PROJECT
The “Headbang” Project was recorded using a device called a digital
electroencephalogram, or EEG. The EEG is an incredibly sensitive device that
uses small electrodes, or sensors, which are placed on the surface of the head
in order to pick-up the tiny electrical impulses that are generated by the surface
of the brain. These impulses are so small that the fields that they generate
are around 200,000,000,000,000 (or 200 million million) times smaller than the
fields generated by a common household magnet.
The EEG is one of the oldest methods for measuring brain activity. It was invented
by Hans Berger in the 1920s and it remains in use in hospitals and universities
all over the world to this day. It is used as a diagnostic tool for certain brain
disorders, and it is also used as a research tool to investigate how our brains
process all kinds of stimuli, including how we interpret visual images, how our
memory works, and how we understand language. It is the origin of the word “brainwaves”,
as you can see by the wave-like recordings of the brain activity.
It is possible for us to analyse these waves of activity in several different
ways. By repeatedly showing a stimulus, like the image of a face, to a person
over and over again, we can average out all of the “noise” in the
activity of the brain (such as thinking about yesterday’s episode of “Eastenders”,
or what you are going to have for dinner), and see how people process that stimulus
down to a thousandth of a second (or a millisecond). Alternatively, it is possible
to measure a person’s brain activity for several hours overnight and examine
the different states of activity people show, including watching them dream.
In our lab we are conducting controversial research where one of the things we
are attempting to do is to see what types of brain activity might be associated
with the processing of anomalous phenomena. For example, this includes examining
whether or not one person can have an influence on the brain activity of another
person, even though they are separated in different rooms over 25 metres apart.
The waveforms for the “Headbang” show the normal brain activity of
Victoria as measured by a network, or web, of over 40 electrodes that were placed
on her head. The violent head movement, or “Headbang”, that Victoria
then made produced huge muscle movements that were then picked-up by these enormously
sensitive sensors. This produced a huge distortion in the waves.
This piece is particularly interesting because the violent movement that Victoria
produces is exactly the sort of movement that researchers and clinician’s
try to avoid when testing people. The EEG is so sensitive it can easily detect
a person even blinking (try and see if you can spot the blinks in the normal
part of the recording), so a large muscle movement of any type is very dramatic.
I am particularly happy to be part of this linkage between science and art, because
I have always thought that the EEG waves are very beautiful and they go beyond
a mere research tool. However, it has taken Victoria’s ability as an artist
to demonstrate the importance of the EEG in a truly different sense.
Ian S. Baker, Koestler Parapsychology Unit, The University of Edinburgh.
PROJECT ROOM
GERMS OF A NEW A UNIMAGINED BLISS
SCOTT LAVERIE
Step into this installation and you are immediately confronted
with a scenario somewhere between the Unabomber’s sinister
country retreat and a chaotic garden shed. This fictional environment
explores the apparently macabre undertakings of an obsessive creator,
who, dwelling upon his towering attic platform absorbs himself
within his regressive methods.
The work in Laverie’s projects contain a fascination with
retrograde technologies, old machines are reactivated for new purposes,
a stoical faith is put into cogs and pulleys, transformers and
diodes.
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