Our long term goal is to provide a framework to understand how a simple, innate behavior emerges from the activity of the nervous system. For this, we will apply a battery of molecular genetics techniques and imaging technologies to study the circuit mechanisms underlying temperature preference in Drosophila -a system ideally suited for a comprehensive genetic and molecular dissection of neural circuits and behaviors. We have recently shown that temperature is represented by a map of activity created by sensory afferents at the first relay station in the fly brain. We now propose to study how this map is processed by central neural circuits and transformed into directed behavior. To accomplish our overall objectives, we will use a combination of targeted photo-activation of GFP, GRASP, ChR2-mediated circuit mapping and genetic expression of effector molecules to: 1) Identify ascending neuronal populations receiving temperature information and representing it to higher brain centers. 2) Study their tuning and properties, and narrow our search to the key pathways that mediate temperature navigation and preference. 3) Determine their connectivity to higher brain centers, study the transformation of stimuli at each station in the circuit and eventually track the descending pathways that control behavior. This work is expected to contribute to our general understanding of the wiring logic of the neural circuits that control innate behavior in animals, and potentially provide insights on how genetic conditions which affect wiring can result in compromised circuit function and altered behavior.

Public Health Relevance

Our long-term goal is to understand how sensory stimuli are represented in the brain and integrated to produce directed behaviors. The studies outlined here will provide insight into the neural basis of temperature processing and preference, and be useful in understanding the function of the nervous system in normal and disease state.

Agency
National Institute of Health (NIH)
Type
Research Project (R01)
Project #
1R01NS086859-01
Application #
8671258
Study Section
Molecular Neurogenetics Study Section (MNG)
Program Officer
Gnadt, James W
Project Start
Project End
Budget Start
Budget End
Support Year
1
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Northwestern University at Chicago
Department
Biology
Type
Schools of Arts and Sciences
DUNS #
City
Evanston
State
IL
Country
United States
Zip Code
60201