Internal state dependent olfactory behavior

Animal exhibit distinct behavior that dependent their internal states even for the same sensory input. *Drosophila* larva responds different to odors when starved compared with fed. This internal state dependent oflactory behavior is controled by a topdown feedback to antennal lobe circuit.

Odor representation in C. elegans

Multineuronal imaging of the odor responses in *C. elegans* and decoding analysis revealed a distinct organization compared with insects and mamammlians.

Optimal nonlinear compressed sensing in olfactory periphery

To achieve efficient coding of odor information in an array of nonlinear olfactory receptors, the odor-receptor sensitivity matrix must be sparse. This sparsity depends on the statistics of environmental odors. We used analytical calclation and extensive numerical simulation to study the optimal sensitivity matrix for recptors with and without spontaneous (background) activity.

Short-term plasticity in early olfactory information processing

We built a circuit model of the first olfactory information processing center of fruit fly, which incorporates key features of neuron-neuron interactions such as short-term plasticity and presynaptic inhibition.