Magnetic actuation of hair cells

David Rowland, Yuttana Roongthumskul, Jae Hyun Lee, Jinwoo Cheon, Dolores Bozovic

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3 Citations (Scopus)

Abstract

The bullfrog sacculus contains mechanically sensitive hair cells whose stereociliary bundles oscillate spontaneously when decoupled from the overlying membrane. Steady-state offsets on the resting position of a hair bundle can suppress or modulate this native motility. To probe the dynamics of spontaneous oscillation in the proximity of the critical point, we describe here a method for mechanical actuation that avoids loading the bundles or contributing to the viscous drag. Magnetite beads were attached to the tips of the stereocilia, and a magnetic probe was used to impose deflections. This technique allowed us to observe the transition from multi-mode to single-mode state in freely oscillating bundles, as well as the crossover from the oscillatory to the quiescent state.

Original languageEnglish
Article number193701
JournalApplied Physics Letters
Volume99
Issue number19
DOIs
Publication statusPublished - 2011 Nov 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Rowland, D., Roongthumskul, Y., Lee, J. H., Cheon, J., & Bozovic, D. (2011). Magnetic actuation of hair cells. Applied Physics Letters, 99(19), [193701]. https://doi.org/10.1063/1.3659299