Multichannel Systems MC_Rack Manual - Manual (Page 190)

MC_Rack Manual
184
E
Enhanced Meta File (EMF): Intermediate format for exchanging vector graphics data, file
extension *.emf
EPSP: Excitatory postsynaptic potential, an electrical change (depolarisation) in the membrane of
a postsynaptic neuron caused by the binding of an excitatory neurotransmitter from a presynaptic
cell to a postsynaptic receptor.
F
fEPSP: Field excitatory postsynaptic potential
G
Graphics Interchange Format (GIF): Indexed-color bitmap graphics, LZW-compressed format
designed to minimize file size, binary transparency, file extension *.gif
H
High: Logical active state of a bit, also known as state 1 or On. For TTL pulses, a High state means
a voltage level of usually 5 Volts.
high pass filter: A filter that passes high frequency waveforms. For example, a 300 Hz high pass
filter passes spikes, but no LFPs.
I
ICO: Bitmap format used for Windows icons (in programs and on desktop), file extension *.ico.
J
Joint Photographic Experts Group (JPEG): Bitmap format, compressed by selectively discarding
data, no transparency, file extension *.jpg.
L
LFP: Local Field Potentials are sum field potentials of the activity within a volume of tissue. The
amplitude reflects the number of active neurons that are contributing to the LFP. In comparison
with single spiking activity, it is a lower frequency signal. To obtain only LFPs (without single
spikes), a 300 Hz low-pass filter can be used.
Low: Logical inactive state of a bit, also known as state 0 or Off. For TTL pulses, a Low state means
0 Volts.
low pass filter: A filter that passes low frequency waveforms. For example, a 300 Hz low pass
filter passes LFPs, but no spikes.
lower cutoff frequency: Between the lower cutoff frequency and the upper cutoff frequency
of a frequency band is the resonant frequency, at which the gain of the filter is at its maximum.
Signal components with a lower frequency than the lower cutoff frequency of a band pass filter
are attenuated.
LTD: Long Term Depression
LTP: Long Term Potentiation
M
MB (megabyte): One megabyte is equal to 1,048,576 bytes, or 1,024 kilobytes.