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A device is needed to measure the saccadic eye movements of a monkey in MRI.
The monkey’s head will be restrained.
The device should not block the monkey’s line of sight to the stimulus displayed on a screen directly in front of it.
All materials used in the device must be compatible with the MRI operating environment.
A fiber optic, photodiode design for detecting horizontal eye movement in the rhesus macaque monkey while in the fMRI was developed and tested. Light from an infrared laser source with an output of 40 mW was directed via fiber optic cable to reflect off of the eye. A photodiode received the reflected light by way of a fiber optic cable and generated a voltage based on the intensity of light received. Testing was conducted using a marble and was continued using sheep eyes. Maximum reflection achieved was 35%. Power output based on a single source cable and single detector cable was not linear with angular eye displacement. Future work includes testing on rhesus eyes and cats, ordering components to construct a functional prototype and integrating this prototype to be used with the client’s software system.
| Week | Reporting Period Beginning | Activities |
|---|---|---|
| 1 | January 23 | Formed team, selected project, assigned team roles, planned for client meeting |
| 2 | January 30 | Met with client, researched background information, began writing PDS |
| 3 | February 6 | Met with MRI technicians at the Waisman Center, complied PDS, researched current commercial eye movement methods |
| 4 | February 13 | Improved PDS, conducted more research |
| 5 | February 20 | Finalized PDS, researched, began preparing the midsemester presentation and paper |
| 6 | February 27 | Worked on midsemester presentation |
| 7 | March 5 | Finalized and prepared for midsemester presentation, worked on midsemester paper |
| 8 | March 12 | Wrote midsemester paper, turned in notebooks |
| 9 | March 19 | Attended ethics discussion, individual product research, took monkey eye measurements |
| 10 | March 26 | Researched photodiode kits and fiberoptics, decided parts to order, updated notebooks |
| 11 | April 2 | Met with Professor McCaughan and research suggested parts to order |
| 12 | April 9 | Began preliminary testing using marbles and equipment borrowed from Professor McCaughan |
| 13 | April 16 | Met with client and advisor, continued marble testing, began preliminary testing with sheep eyes |
| 14 | April 23 | Continued testing with sheep eyes, prepared for Poster presentation |
| 15 | April 30 | Final Poster Presentation, updated notebooks, updated website, wrote and handed in Final paper and notebooks |
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Midsemester Presentation (Mar 9 2004, 289 kb) |
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Midsemester Paper (Apr 17 2004, 648 kb) |
|
Final Presentation (May 1 2004, 10110 kb) |
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Final Paper (May 4 2004, 3336 kb) |
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Product Design Specifications (May 5 2004, 27 kb) |
