Intensity versus Identity Coding in an Olfactory System

Intensity versus Identity Coding in an Olfactory System

We examined the encoding and decoding of odor identity and intensity by neurons in the antennal lobe and the mushroom body, first and second relays, respectively, of the locust olfactory system. Increased odor concentration led to changes in the firing patterns of individual antennal lobe projection neurons (PNs), similar to those caused by changes in odor identity, thus potentially confounding...

Complementary codes for odor identity and intensity in olfactory cortex

The ability to represent both stimulus identity and intensity is fundamental for perception. Using large-scale population recordings in awake mice, we find distinct coding strategies facilitate non-interfering representations of odor identity and intensity in piriform cortex. Simply knowing which neurons were activated is sufficient to accurately represent odor identity, with no additional info...

Imaging and coding in the olfactory system.

Functional imaging methods permit analysis of neuronal systems in which activity is broadly distributed in time and space. In the olfactory system the dimensions that describe odorant stimuli in "odorant space" are still poorly defined. One way of trying to characterize the attributes of this space is to examine the ways in which its dimensions are encoded by the neurons and circuits making up ...

Some new results on the coding of pheromone intensity in an olfactory sensory neuron

Temporal coding in an olfactory oscillatory model

We propose a model of the glomerular stage of the insect olfactory pathway that exhibits coding of inputs through spatio}temporal patterns of the type observed experimentally in locust.Making use of the temporal bins provided by the oscillatory "eld potential we "nd that it su$ces to employ simple little-Hop"eld dynamics to account for a rich repertoire of patterns. In particular, we show that ...