ETT Olfactometer 2, Manual

Page: 42 / 64

42
© Emerging Tech Trans, LLC
Figure 71 - Visualization of predefined respiratory trigger (inhalation onset synchronization with valve open onset) in group
settings via red RT.
Figure 72 - Visualization of the paradigm during encounter of respiratory condition. The waiting block will flash green and gray
until an inhalation onset is detected.
Whenever the software encounters this condition during paradigm execution, it will maintain the state
defined prior and update valve settings and visual queue upon onset of the next respiratory cycle. The
relevant section will flash green during paradigm execution, while it is awaiting its trigger (Figure 72).
For testing purposes, it is possible to manually fulfill the trigger condition by clicking the
Manual Trigger
button.
Beyond basics
Under certain conditions, the use of the predefined triggers External TTL Triggered Start and Synchronize
stimulus onset with inhalation onset might not be sufficient. When paradigms require complex trigger
conditions the use of the Add / edit Triggers / Labels / EEG DINs tab might be advisable. In older
versions, the same feature will be found in the Add / edit EEG DINs tab.
Case 1 – fMRI TR onset synchronization
In a hypothetical fMRI scenario where the group onset might need to be synchronized with the TR onset
which is communicated via a TTL pulse (or optical in Siemens MRI systems; use provided hardware
trigger converter box) this tab can be used. In this case as shown in Figure 73 a group named Group 1