Dance your PhD 2010: Mechanisms of lateral inhibition between olfactory bulb glomeruli
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Uploaded by jenniferwhitesell on Oct 18, 2010
Inhaled odor molecules bind to receptors located on olfactory sensory neurons in the nasal cavity. The signal from odor receptors is transmitted along the olfactory nerve to the olfactory bulb. The surface of the olfactory bulb is covered with spherical structures called glomeruli, each composed of a bundle of neuronal processes surrounded by cell bodies. Each glomerulus receives input from only one subtype of odor receptor, and each odor activates a unique set of receptors and therefore a unique pattern of glomeruli. I use electrophysiological recordings from rat olfactory bulb slices to examine the functional connections between cells. We hypothesize that an activated glomerulus can inhibit the activation of nearby glomeruli through short axon cells, which connect groups of ten to twenty glomeruli. Lateral inhibition through short axon cells could increase the contrast between similar odors with nearly identical glomerular activation patterns, making it easier for animals to differentiate highly similar odors.
In the dance, I have simplified the system so that each odor sniffed by the dog activates one glomerulus. Each segment starts with the dog inhaling the odor, which is then represented in dance form as a ball that is caught by an odor receptor. The receptor neuron then becomes activated and the odor signal travels along the olfactory nerve to the olfactory bulb where it tags the appropriate glomerulus to activate it. The dancers in each circle represent the glomerular cells activated by the incoming signal, and the dancers that move away from the glomerulus are the short axon cells that inhibit the other glomeruli.
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This was the best "dance you PhD" dance EVER! How did this not win?
Also, I might be a bit biased since I'm one of the dancers.
bianconero2882 1 year ago 2