Glossary
142
Geodesic Sensor Net Technical Manual
S-MAN-200-GSNR-001 • January 31, 2007
interface cable The cable connecting
the Geodesic Sensor Net to the amplifier.
The interface cable connectors are
Hypertronics connectors. This cable is
also known as the
Geodesic Sensor Net
interface cable (GSNIC
).
isolated common See
common
.
isolation mode rejection A measure of
the attenuation of ambient electrical
noise common to all electrodes and
common in relation to mains supply
ground.
J
jack Socket or connector into which a
plug may be inserted.
M
mastoid A bony outcropping of the
skull located behind each ear.
montage One of several methods of
combining, selecting, or arranging data
from multiple sensor locations, or the
result of defining one of such methods.
On a given montage, a combined
waveform is a derivative of the
waveforms at the sensors chosen to be
combined. A selection of sensors results
in the display of a subset of all the
sensors originally used to make a
recording.
MRI Magnetic resonance imaging uses
computer imaging of atomic response to
radio waves in a magnetic field to
generate imagery of tissue.
N
nasion The point where the bridge of
the nose meets the skull.
Net Amps 200 and 300 Electrical
Geodesics Inc.’s dense-array amplifiers.
Net Station Electrical Geodesics Inc.’s
Mac-based data-acquisition software.
Neurotravel amplifier Electrical
Geodesics’ 32-channel amplifier.
Neurotravel Win Electrical Geodesics’
PC-only clinical EEG data-acquisition
software.
noise Unwanted electromagnetic
radiation within an electrical or
mechanical system.
O
occipital protuberance The prominence
on the outer surface of the occipital
bone.
offset With reference to waveforms,
offset is a DC deviation or the amount of
DC deviation from zero.
orbital Relating to orbits. In the case of
orbital sensors
, this refers to sensors near
the eye sockets.
P
plug A fitting used to make electrical
connections.
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