An important goal of neuroscience is to understand the neural mechanisms by which organisms detect and represent sensory experiences. There is compelling evidence that the mushroom bodies of the insect brain participate significantly in olfactory and memory functions. These structures, in important ways, resemble mammalian brain areas believed to perform similar functions. The mushroom bodies thus serve as a relatively simple model for olfactory and memory processing with odorant serving as a natural, behaviorally relevant form of sensory stimulation. In the locust mushroom bodies, as in mammalian pyriform cortex, odors induce synchronous neuronal activity detectable as tightly coordinated activity among individual neurons, and as oscillating local field potentials. This synchronous activity changes as the animal acquires experience with a given odorant. The goal of the current project is to investigate how this neural synchrony is generated, what functions it might subserve, and where some forms of synaptic plasticity may reside in this system. These studies will employ extracellular and intracellular recording techniques to examine the contributions of specific classes of interneurons to the odor-induced oscillations in the presence of both novel and familiar odorants. The analysis will likely reveal general features of coordinated neuron assemblies involved in sensory processing and memory.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32DC000234-02
Application #
2518044
Study Section
Sensory Disorders and Language Study Section (CMS)
Project Start
1997-09-01
Project End
Budget Start
1997-09-01
Budget End
1998-08-31
Support Year
2
Fiscal Year
1997
Total Cost
Indirect Cost
Name
California Institute of Technology
Department
Type
Schools of Arts and Sciences
DUNS #
078731668
City
Pasadena
State
CA
Country
United States
Zip Code
91125
Tanaka, Nobuaki K; Suzuki, Emiko; Dye, Louis et al. (2012) Dye fills reveal additional olfactory tracts in the protocerebrum of wild-type Drosophila. J Comp Neurol 520:4131-40
Aldworth, Zane N; Stopfer, Mark (2012) Olfactory coding: tagging and tuning odor-activated synapses for memory. Curr Biol 22:R227-9