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© Emerging Tech Trans, LLC

ETT Gustometer 2

Gustatory Stimulation

Manual and Tutorial

Revision 2021.1

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Содержание Gustometer 2

Страница 1: ...1 Emerging Tech Trans LLC ETT Gustometer 2 Gustatory Stimulation Manual and Tutorial Revision 2021 1 ...

Страница 2: ...irst power up 3 System components 3 System Overview 6 Tastant setup 7 Tastant applicator Mouth piece setup 7 Applicator tubing 7 Coil mounting fMRI package 7 Fitting a subject 8 The first experiment 8 Typical tastants 9 Touch screen operating system 9 Resources 13 Useful information 13 Storage 13 Cleaning procedures 13 Trouble shooting 15 Data management 15 ...

Страница 3: ...l Emerging Tech Trans LLC 2151 Harvey Mitchell Parkway S STE 209 College Station TX 77840 USA info emergingtechtrans com Connecting the Device Before the first power up After receiving and unboxing the device inspect the ETT Gustometer 2 for visible damage to both the package and the actual device Do not power on the device if there are visible damages or audibly dislodged parts within the case Co...

Страница 4: ...t 2 Set of food safe bottles for the stimulants flavored fluids up to 8 at a time can be stored on the top of the device Figure 4 Provided glass jar with Teflon cap for stimulant storage 3 Customized mouthpiece applicator attaches to the RF coil or a provided table clamp MR and EEG compatible Figure 5 Applicator can clip to RF coil structure and delivers tastant at correct angle without drops gett...

Страница 5: ...nects the subject mouthpiece with the device 5 PTFE Inlet tubing set between tastant bottles and device 6 Swallow sensor belt with digital input optional 7 Coax connector connects the device trigger in port to the BNC pin of the MR RF trigger converter not needed on non Siemens systems 8 MRI RF Trigger converter converts an optical trigger from the RF cabinet of the MRI system to a TTL electrical ...

Страница 6: ...ter 2 outside the experimentation room Even for EEG experiments it might be advisable to maintain a wall separation between subject and device Each pump has a slightly different pitch which might inform the subject which is the currently active stimulus Connect the power supply cable and power the Gustometer up by pressing the power button on the front panel Connect a USB flash drive to the DATA p...

Страница 7: ... during experiments the mouthpiece must be parallel to the direction of gravity If the standard mouthpiece as provided with the Gustometer does not suit the needs experimental requirements contact ETT support for a custom design Contact ETT for service or replacement of mouth pieces Applicator tubing Proper routing of the PTFE tubing is important to allow drop formation especially for small delive...

Страница 8: ...is advised to fit the clamp to the upper part of the head coil first While the subject gets situated in the coil slide the mouthpiece into the clamp into the most upward position without securing it yet with the pin Now slowly join the coil with the subjects mouth Confirm with the subject that they get each tastant during the standard test run through all channels The first experiment Before the f...

Страница 9: ...ed water It is important to assure a proper drop formation at the mouthpiece If the number of drops is set too low for a tastant with a high viscosity the drop may just grow bigger at the tip of the mouthpiece but not actually fall onto the tongue in time This aspect should be tested thoroughly and experimentally adjusted to the specific requirements of the study Touch screen operating system Main...

Страница 10: ...f the device within a program The bottom row displays the current multiplier for channels 1 7 as well as Rinse for the current paradigm The large white bar below shows the progress during paradigm execution Above the user can quickly see the current paradigm configuration Starting on the left a general delay time before the paradigm loops start is displayed Next to it is the number and duration of...

Страница 11: ...d via one of the slots on the next page Paradigm Settings Sequence Figure 14 The volume for each channel is signified by a multiplier that roughly equals 1 drop for distilled water Please note that the exact number of drops depends on the liquid used mouthpiece rotation and other parameters It is better to rely on actual volume than drops The time in seconds after drop delivery called Response tim...

Страница 12: ...h followed by a 10 5 s period during which the subject can swallow Stimulus 1 is concluded with a 10 7 s rest period The paradigm would then execute the settings of channel 2 This continues for all channels to channel 7 and is repeated 3 times Figure 14 Page 1 of the paradigm sequence slot overview with each number representing the stimulus channel that is called during the current loop iteration ...

Страница 13: ...ree of any experimental residuals Especially dried solids from an experiment like sugar or salt can cause problems once the device is reactivated The disinfected and dried mouthpiece should be stored in a separate bag A dust free environment is ideal Cleaning procedures To guarantee optimal subject safety and a long lifespan of your ETT Gustometer 2 and the supplied equipment we advise to follow t...

Страница 14: ...eservoir bottles e In the PC Manual Prime mode of the touch OS click START to pump distilled water through each line of the whole system f Optionally the duration of priming each channel with distilled water can be adjusted it should be at least 120s repeat if necessary Be aware to collect the liquid in a container of choice coming out of the mouthpiece end 6 Repeat step 5 with 70 Ethanol 7 Option...

Страница 15: ...ng pump with Gustometer without liquid reservoir connected 6 After the mouthpiece is dry it can be stored in a sealable plastic bag until it is being used again 7 Repeat this procedure prior to use if necessary At this point a thorough visual inspection is also advised to catch possible defects before you start your next experiment Trouble shooting In case the pump initially does not deliver the l...

Страница 16: ...ch paradigm will create a data file dat csv in a subject folder on the connected USB flash drive that logs the device state about every 100 ms The file contains the current time input trigger levels peripheral voltage levels and the state of each channel including rinse 1 on 0 off This along with screen shots of the current paradigm configuration is stored each time the paradigm is executed If the...

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