Magnetic actuation of hair cells

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

Research output: Contribution to journalArticle

3 Citations (Scopus)


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
Issue number19
Publication statusPublished - 2011 Nov 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Magnetic actuation of hair cells'. Together they form a unique fingerprint.

  • Cite this

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