​Graduate Student Seminar

Seminar | September 24 | 11:10 a.m.-12:30 p.m. | 489 Minor Hall

 Ethan Bensinger, Roorda Lab; Baladitya Yellapragada, Yu Lab

 Neuroscience Institute, Helen Wills

Ethan Bensinger's Talk Title
Dysflective Cones: Differences in Cone Reflectivity and Function in Healthy Subjects
Confocal Adaptive Optics Scanning Laser Ophthalmoscope (AOSLO) images acquired in healthy subjects reveal small areas with diminished cone reflectivity. In a survey of AOSLO images these transient hyporeflective areas of cones were found in 19 of the 80 eyes. 3 healthy subjects with hyporeflective cones were tested with AOSLO mediated microperimetry and found to have preserved function in these areas. 1 of these 3 subjects showed elevated thresholds while the other 2 subjects showed very similar thresholds to the surrounding areas.

Baladitya Yellapragada Talk Title
Motion Selectivity of Neurons in Self-Driving Networks
We investigated if optical flow filters were implicitly learned by a neural network trained to drive a vehicle. The network was not trained to predict optical flow across the frames, but, through a series of controlled experiments, we claim that optical flow filters are present in the network. However, this appears to be only the case for sideways flows more relevant for steering predictions. For motor throttle predictions, the network looks at the variance of the pixels over time rather than computing optical flow. In addition, the filters that are likely used for motor throttle predictions dominate primarily in the middle of the network.

 nrterranova@berkeley.edu