CBMM | Quest: Brains, Minds, and Machines Seminar Series: How fly neurons compute the direction of visual motion

Speaker: Alexander Borst , Max-Planck-Institute of Neurobiology, Martinsried, Germany

Date: Tuesday, March 22, 2022

Time: 2:00 PM to 3:00 PM Note: all times are in the Eastern Time Zone

Public: Yes

Location: This seminar talk will be hosted remotely via Zoom

Event Type: Seminar

Room Description:

Host: Prof. Tomaso A. Poggio

Contact: Kris Brewer, brew@mit.edu

Relevant URL: https://cbmm.mit.edu/news-events/events/brains-minds-and-machines-seminar-series-how-fly-neurons-compute-direction-visual

Speaker URL: https://www.bi.mpg.de/2402854/borst-page

Speaker Photo:
Borst pr v4

Reminders to: seminars@csail.mit.edu

Reminder Subject: TALK: CBMM | Quest: Brains, Minds, and Machines Seminar Series: How fly neurons compute the direction of visual motion

Abstract: Detecting the direction of image motion is important for visual navigation, predator avoidance and prey capture, and thus essential for the survival of all animals that have eyes. However, the direction of motion is not explicitly represented at the level of the photoreceptors: it rather needs to be computed by subsequent neural circuits, involving a comparison of the signals from neighboring photoreceptors over time. The exact nature of this process represents a classic example of neural computation and has been a longstanding question in the field. Only recently, much progress has been made in the fruit fly Drosophila by genetically targeting individual neuron types to block, activate or record from them. Our results obtained this way demonstrate that the local direction of motion is computed in two parallel ON and OFF pathways. Within each pathway, a retinotopic array of four direction-selective T4 (ON) and T5 (OFF) cells represents the four Cartesian components of local motion vectors (leftward, rightward, upward, downward). Since none of the presynaptic neurons is directionally selective, direction selectivity first emerges within T4 and T5 cells. Our present research focuses on the cellular and biophysical mechanisms by which the direction of image motion is computed in these neurons.

Please click the link below to join the webinar:
https://mit.zoom.us/j/99216860152?pwd=VDJpcXF2OWtPZ0ZJTk1oNm9BSk9IUT09
Passcode: 691430

Research Areas:
AI & Machine Learning, Computational Biology, Graphics & Vision, Human-Computer Interaction

Impact Areas:

See other events that are part of the Brains, Minds and Machines Seminar Series 2021 - 2022.

Created by Kathleen Sullivan Email at Tuesday, March 15, 2022 at 4:26 PM.