The Use of 2-channel Electroencephalography to Determine Saccadic Eye Movement
Mentor 1
Dr. Wendy Huddleston
Location
Union Wisconsin Room
Start Date
29-4-2016 1:30 PM
End Date
29-4-2016 3:30 PM
Description
Impairments in the ability to interact with one’s environment can many diseases such as Attention Deficit/ Hyperactivity Disorder and Alzheimer’s Disease. The pathway of the interaction between attention to a stimulus and movement to this stimulus is our primary focus. To determine this pathway we are using Magnetoencephalography (MEG). MEG maps brain activity by measuring magnetic fields generated by ionic electric currents within the neurons of the brain. For our experiment we need to track eye movements. However, our typical method of is not feasible because metal from the equipment will disrupt the small magnetic currents measured with MEG. Therefore, the purpose of this present project is to determine a protocol of Electrooculography (EOG) to monitor eye movements. EOG involves applying pairs of electrodes on the planes of the eye (horizontal/vertical). In the human eye, a permanent potential difference between the cornea and the ocular fundus sets up an electrical field around the eye this can be detected by the electrodes. The stimulus is surrounded by a circle of 8 letters. The stimulus in the middle of the circle flashes one of the and the participant must move eye toward the indicated target. To interpret the data we measure the voltage . As the eye looks to the right(negative electrode) voltage read out will be negative volts and as the eye looks to the left(positive electrode) the voltage readout will be positive. This same analysis can be repeated with the vertical plane.
The Use of 2-channel Electroencephalography to Determine Saccadic Eye Movement
Union Wisconsin Room
Impairments in the ability to interact with one’s environment can many diseases such as Attention Deficit/ Hyperactivity Disorder and Alzheimer’s Disease. The pathway of the interaction between attention to a stimulus and movement to this stimulus is our primary focus. To determine this pathway we are using Magnetoencephalography (MEG). MEG maps brain activity by measuring magnetic fields generated by ionic electric currents within the neurons of the brain. For our experiment we need to track eye movements. However, our typical method of is not feasible because metal from the equipment will disrupt the small magnetic currents measured with MEG. Therefore, the purpose of this present project is to determine a protocol of Electrooculography (EOG) to monitor eye movements. EOG involves applying pairs of electrodes on the planes of the eye (horizontal/vertical). In the human eye, a permanent potential difference between the cornea and the ocular fundus sets up an electrical field around the eye this can be detected by the electrodes. The stimulus is surrounded by a circle of 8 letters. The stimulus in the middle of the circle flashes one of the and the participant must move eye toward the indicated target. To interpret the data we measure the voltage . As the eye looks to the right(negative electrode) voltage read out will be negative volts and as the eye looks to the left(positive electrode) the voltage readout will be positive. This same analysis can be repeated with the vertical plane.
