User manual

Blackrock Microsystems CereStim R96 - User Manual
Rev. 1.00 ® Page 7
LB-0432
modules are grey. Active current modules can be disabled by clicking on one of the active arrays.
Deactivated modules change from green to red.
Enabled Disabled Unavailable
Mode Panel (3): Stim Manager has two working modes: automatic and manual. The mode is changed by
clicking the ‘Switch’ button in the Mode Panel.
Auto Mode: This is the default mode. Stim Manager must be in Auto Mode in order to create a
new pulse configuration or make any changes to existing pulse configurations. Auto mode allows
the user to create complex stimulation scripts as well as repetitive cycles.
Manual Mode: This mode is intended for single stimulation applications. In this mode, the user
selects an electrode channel from the Electrode Array Panel and a Pulse Configuration from the
Configuration ID Panel. Click ‘Start’ to send the selected pulse to the selected electrode channel.
Stimulation scripts are not available in this mode.
Electrode Array Panel (4): In Auto Mode, selecting an electrode channel from this panel will disable that
channel, turning the channel from green to red. The channel can be re-enabled by clicking on that channel
a second time. In Manual Mode, clicking on an electrode channel will select it for stimulation, turning the
channel from green to yellow. If the electrode channel is unavailable, the channel appears grey.
Test Modules: The CereStim R96 has an auto-check function called Test Modules. When the Test
Modules button is selected, the system sends a pulse (Config 0)
to an internal 100KΩ resistor and measures the output voltage
at five different points of the test pulse (Figure 3-9).
If the output voltages are in line with the parameters of the
current pulse, then the module is “OK.” If not, Stim manager
provides the following message: “ERROR. Possible voltage
limitation. Please check it.”
Test Electrodes: Clicking the Test Electrodes button sends a stimulus (config 0) to each of the
enabled electrodes and measures the output voltages (V) at five different points of the pulse (same
as Test Modules). These values, along with an estimation of the impedance values (KΩ) for each
electrode channel, are provided in the Log Window of the Report Tab. The impedance
measurements offer the user a tool for detecting broken electrodes or gradual degradation.
During this test, the system also checks the second voltage point of the pulse to determine if it’s
close to the Output Vmax. If so, the message “HIGH IMPEDANCE. Possible voltage limitation”
appears, and the user should adjust the Output Vmax value or re-evaluate the stimulation
parameters.
In addition to the log window, the results are saved in a file named:
“/Measurements/CereStim R96_ddmmyy_hhmmss.txt”. These files are tabulated for easy
importation into a database
Pulse Figure: This feature identifies each parameter of the stimulation pulse with a red circle as the
user moves the mouse over the corresponding parameter boxes in the Stimulus Panel. The pulse
figure also identifies whether the first phase of the selected stimulus from the Configuration ID
Panel is anodic or cathodic.
Figure 3-8: Test Pulse