13:30 - 15:30
Sat-S14
Hahn Lecture Hall
Chair/s:
Tobias Ackels, Sebastian H Bitzenhofer, Katherine Nagel
Olfactory cues are highly dynamic, as is their processing in the brain. With this symposium, we will highlight recent work on the dynamics of natural odour stimuli, olfactory representations, and olfactory behaviour, in a variety of model systems (mouse, fish, and fly). This symposium will give an exciting and timely overview merging complementary perspectives on the dynamic aspects of olfactory processing and perception across model systems.
Correlating mouse head-motions with odor plume-contacts in an olfactory-guided navigation task
Sat-S14-005
Presented by: Mohammad Tariq
Mohammad Tariq 1, 2, Scott Sterrett 1, 2, Sidney Moore 2, David Perkel 3, David Gire 2
1 Graduate Program in Neuroscience, University of Washington, Seattle WA, 2 Department of Psychology, University of Washington, Seattle WA, 3 Departments of Biology and Otolaryngology, University of Washington, Seattle WA
Although much is known about the mammalian brain olfactory structures and the physiological activity within them during passive presentations of odors in head-fixed setups, how olfactory cues shape naturalistic behaviors and their neural underpinnings in freely moving mammals remains poorly understood. One main difficulty of studying naturalistic plume-guided behaviors stemmed from the challenges associated with recreating the complex olfactory landscape that animals experience in the wild, and correlating the dynamic olfactory information with the behavior and neural processing. This is because the odor molecules emanating from a source are spread by the turbulent and chaotic motion of the air molecules, resulting in a spatiotemporally varying signal in the form of an olfactory plume. We previously reported a method (Tariq et al., 2021) to record real-time odor information during plume-tracking in mice. In addition, Findley et al., 2021 have established head-motions as a key behavioral feature for mice engaged in an odor gradient-dependent choice task. Here we combine our odor recording method with real-time head motion monitoring, using 3-axis accelerometer recordings, and posture tracking to establish correlation between plume contacts and head-motion changes. Our data show the importance of head-motions, and their plume-contacts dependence, for active sensation in an olfactory-guided navigation task. Hence, these combined results establish the naturalistic behavior of plume-tracking as a valuable experimental task to study neural encoding and decoding during a complex sensorimotor transformation in mammals.