+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Tuning of gravity-dependent and gravity-independent vertical angular VOR gain changes by frequency of adaptation

, : Tuning of gravity-dependent and gravity-independent vertical angular VOR gain changes by frequency of adaptation. Journal of Neurophysiology 107(12): 3349-3356

The gain of the vertical angular vestibulo-ocular reflex (aVOR) was adaptively increased and decreased in a side-down head orientation for 4 h in two cynomolgus monkeys. Adaptation was performed at .25, 1, 2, or 4 Hz. The gravity-dependent and -independent gain changes were determined over a range of head orientations from left-side-down to right-side-down at frequencies from .25 to 1 Hz, before and after adaptation. Gain changes vs. frequency data were fit with a Gaussian to determine the frequency at which the peak gain change occurred, as well as the tuning width. The frequency at which the peak gravity-dependent gain change occurred was approximately equal to the frequency of adaptation, and the width increased monotonically with increases in the frequency of adaptation. The gravity-independent component was tuned to the adaptive frequency of .25 Hz but was uniformly distributed over all frequencies when the adaptation frequency was 1–4 Hz. The amplitude of the gravity-independent gain changes was larger after the aVOR gain decrease than after the gain increase across all tested frequencies. For the aVOR gain decrease, the phase lagged about 4° for frequencies below the adaptation frequency and led for frequencies above the adaptation frequency. For gain increases, the phase relationship as a function of frequency was inverted. This study demonstrates that the previously described dependence of aVOR gain adaptation on frequency is a property of the gravity-dependent component of the aVOR only. The gravity-independent component of the aVOR had a substantial tuning curve only at an adaptation frequency of .25 Hz.


PMID: 22402654

DOI: 10.1152/jn.01075.2011

Other references

Aswathanarayana, NV.; Manjunatha, KR., 1981: Studies on the chromosomes of the genus Tatera: a preliminary report on the occurrence of autosomal polymorphism in the Indian gerbil, Tatera indica hardwickei (Gray). Mammalian Chromosomes Newsletter, 223: 55-56

Anonymous, 2007: The Northern Territory can provide hope for the future. Australian Journal of Rural Health 15(5): 283-284

Ren Y F.; E.A., 1989: Intratumoral injection of absolute alcohol under the guidance of b mode ultrasonography in the treatment of huge nodular hepatoma. Under the guidance of B-mode ultrasonography 14 cases of advanced hepatoma were treated by intratumoral injection of absolute alcohol and followed up for periods of 3-15 months. One case is still living 15 months after treatment, with the tumor di...

Maeno Yohihiko; Hasegawa Takashi, 1987: Wave-induced pore pressure in saturated sand bed covered with impermeable layer. Proceedings of the Symposium on Coastal and Ocean Management 1987, Vol

Grijsen, M.L.; Mchaile, D.; Geut, I.; Olomi, R.; Nwako, M.; Requena, L.; Howlett, W.P.; Mavura, D.R.; Dekker, M.C.J., 2017: Juvenile dermatomyositis in a 4-year-old Kenyan girl. To our knowledge, this is the first case report of juvenile dermatomyositis (JDM) in Tanzania. It demonstrates that the characteristic cutaneous findings of JDM may easily be overlooked, especially on dark skin, and the difficulty of clinical mana...

Warming, E.; Graeb Ner, P., 1931: Textbook of ecological plant geography. Textbook of ecological plant geography Lehrbuch der Okologischen Pflanzengeographie 481-720

Uscher-Pines, L.; Mehrotra, A.; Bogen, D.L., 2017: The emergence and promise of telelactation. Although professional breastfeeding support positively influences breastfeeding behaviors, access to International Board-Certified Lactation Consultants (IBCLCs) is limited in many communities. Recognizing their unique role in the provision of bre...

Reetz, M.T.; Wilensek, S.; Zha, D.; Jaeger, K-Erich., 2001: Directed Evolution of an Enantioselective Enzyme through Combinatorial Multiple-Cassette Mutagenesis. Angewandte Chemie 40(19): 3589-3591

Anonymous, 1980: Meeting of the Austrian Seed Producers' Study Group, 25-27 November 1980, Gumpenstein, Austria. The theme of the meeting was breeding for disease resistance and/or chemical disease control. Many of the papers deal with cereal crops.

Ter-Mikaelian, M.; Semple, M.N.; Sanes, D.H., 2014: Effects of spectral and temporal disruption on cortical encoding of gerbil vocalizations. Animal communication sounds contain spectrotemporal fluctuations that provide powerful cues for detection and discrimination. Human perception of speech is influenced both by spectral and temporal acoustic features but is most critically dependent...