ORION EM G

EMG-4754
EMG -4755
EMG -4756 8-, 12·, 16-channel Electro Encephalographs
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When performing electrophysiological examinations in neuropathology
and psychiatry, the equipments can be used for scien·
tific analysis as well as diagnostics. The equipments meet all
requirements made with up-to-date encephalographs. Owing to
their high sensit ivity (1 mmf!J.V), low own noise, high immunity
for external disturbing signals, high number of channels and
other special provisions t he equipments can be used for scientific
research in addition to the routine tests. The preamplifiers and
the recorder are designed a.s separate units. The type EMG-4754
has 8, the t ype EM G-4755 has 12. the type EMG -4756 has 16
channels. The construction of the equipments and arrangement
of their units ensure that the operator can sit comfortably.
The preamplifier channels, the common amplification control.
the routine switch and the calibrating unit are designed as plug-in
units. Besides the recorders of the EEG lead the instrument
is provided also with two separate recorders used for recording
the time signals in every second, marker signals as well as for
recording stimulating signals in case of stimulation.
By means of the selector switches, the electrode points and the
indifferent point can be coupled to the input of amplifier channels
in any combination. The plug-in routine switches serve for the
adjustment of 9 routine programs. For separate order, EMG
supplies routine switches allowing of t he adjustment of other
r equired programs. Two polygraph amplifier s with 1 mY sensitivity
are built into the main recorder unit , and can be switched
instead of the two last channels. They ar e suitable for the exa·
mination of the var ious physiological functions, intercon necting
the appropriate transducers. There is also a possibility for connection
to an oscilloscope. The photostimulators types EMG-4761
and EMG -4764 or phonostimulators types EMG -4762 and EM G-
4763 can also be connected to the equipment.
STIMULATORS
Photo- and phonostimulators ar e an applience for· performing
electrophysiological examinations in neurology, and psychiatry.
Their special field of a pplication is electro encephalography. The
instruments are fully transistorized.
EMG -4761 Photostimulator
It is suitable for produci ng light stimuli with adjustable flas h
frequencies. Both the intensity and the colour of the light
stimuli can be altered. The frequency can be adjusted between
2 and SO cfs.
EMG-4762 Phonostimulator
The instrument is capable of producing continuous sound signals
with 5 different frequencies for sound stimuli. Intensity of the
ow d istortion signals can be adjusted.