A new method for wide frequency range dynamic olfactory stimulation and characterization

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16 Citas (Scopus)

Resumen

Sensory receptors often receive strongly dynamic, or time varying, inputs in their natural environments. Characterizing their dynamic properties requires control and measurement of the stimulus over a frequency range that equals or exceeds the receptor response. Techniques for dynamic stimulation of olfactory receptors have lagged behind other major sensory modalities because of difficulties in controlling and measuring the concentration of odorants at the receptor. We present a new method for delivering olfactory stimulation that gives linear, low-noise, wide frequency range control of odorant concentration. A servo-controlled moving bead of silicone elastomer occludes the tip of a Pasteur pipette that releases odorant plus tracer gas into a flow tube. Tracer gas serves as a surrogate indicator of odorant concentration and is measured by a photoionization detector. The system has well-defined time-dependent behavior (frequency response and impulse response functions) and gives predictable control of odorant over a significant volume surrounding the animal. The frequency range of the system is about 0-100 Hz. System characterization was based on random (white noise) stimulation, which allows more rapid and accurate estimation of dynamic behavior than deterministic signals such as sinusoids or step functions. Frequency response functions of Drosophila electroantennograms stimulated by fruit odors were used to demonstrate a typical application of the system.

Idioma originalEnglish
Páginas (desde-hasta)681-688
Número de páginas8
PublicaciónChemical Senses
Volumen32
N.º7
DOI
EstadoPublished - sep. 2007

Nota bibliográfica

Funding Information:
We thank Päivi H. Torkkeli for comments and suggestions on the article. Julia Schuckel gave technical support. Support for this work was provided by the Canadian Institutes of Health Research.

ASJC Scopus Subject Areas

  • Physiology
  • Sensory Systems
  • Physiology (medical)
  • Behavioral Neuroscience

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Citar esto

French, A. S., & Meisner, S. (2007). A new method for wide frequency range dynamic olfactory stimulation and characterization. Chemical Senses, 32(7), 681-688. https://doi.org/10.1093/chemse/bjm035