BME 4900 Final Report - Biomedical Engineering - University of ...

20 BME 4900 Final ReportTeam 8Information from the robot’s cameras will be processed and the distance anddirection the eyes must move will be supplied by the robot. The appropriate half of thesuperior colliculus will fire for a period of time related to this information. The cameraswill continuously monitor the LED array before it. When a new LED is lit, the robot willshift its gaze to it.Fig. 17 outlines the procedure for mimicking the superior colliculus.EyeMovementRobotImage FeedImage Processingto Locate LEDSCalculations toDetermine Changein StateAngle andDirection ofDesiredMovementGeneration ofMovement viaNeural NetworkSignalImitatingSuperiorColliculusGeneration ofProportionalSignalFigure 17. A flowchart illustrating the operation of the superior colliculus is shown. The processis initiated with information provided by the robot, indicated in red. The first four steps will bepart of the robot team’s design and the last three will be implemented in this design.Before the robot-neural network integration takes place, a signal representingsaccade direction and magnitude will be generated with LabVIEW and used as the inputto the neural network. Thus, this device will be able to operate independently of an eyemovementrobot and be used as a model at any time.2.2.4 CerebellumAt the request of the client, the cerebellum elements of the neural network,notably the fastigial nucleus, will not be included in the circuit design. The superiorcolliculus will function such that it will fulfill the role of the input to the neuralpopulations that would otherwise be connected to the fastigial nucleus. This substitutionwill be referred to when describing the inputs and outputs of the other neuronpopulations.