Orientation

Stimulus

Setup 1 and setup 3 have different stimulus orientation. The following two stimuli can get used to test the stimulus orientation on a setup. File:Test orientation.zip

In 2022, the orientation of the stimulus as seen by the retina were as follows:

Setup 1:

- MB0_deg: goes from front (ventral / curtain) to back (dorsal)

- MB90_deg: goes from right to left

Setup 3:

- MB0_deg: goes from back (dorsal) to front (ventral / curtain)

- MB90_deg: goes from right to left

If you design a stimulus in QDSpy you can check its orienation by playing these stimuli and your stimulus. Here are visual explanations: Setup 1:

Setup 2:

Igor

If you open a file in Igor (ScanM) and display it with e.g. Automated Cell Label, it will look something like this. The center coordinates (which is also the stimulus center) will be like this. Note the flip of x and y and the signs.