The cat's vestibulo-ocular reflex

The Journal of Physiology
M Donaghy

Abstract

1. The conscious cat's vestibulo-ocular reflex (v.o.r.) has been studied using the electro-oculogram to measure eye movements. A servomotor was used to rotate the head horizontally while the body remained stationary. 2. The frequency content of natural head movements in the cat has been determined by Fourier analysis. The fastest and most kinked head movement profiles contain frequency components of significant power extending up to 7-10 Hz. 3. The transfer function of the v.o.r. slow-phase response was measured in the frequency range 0.2-7 Hz. At 1 Hz the average gain is 0.94 with a phase lead of 3 deg. At 7 Hz the gain has only fallen to 0.81 and the phase lag is 10 deg. This indicates that the v.o.r. can compensate to a considerable degree for the high-frequency components of natural head movements. 4. Rotation of the body around a stationary head in the absence of vision does not produce a measurable neck-ocular reflex. 5. The presence or absence of fast phases has no effect on the phase lead of the v.o.r. slow-phase response at 0.2 Hz. 6. V.o.r. fast phases never occur more frequently than 4/sec. 7. Fast phases do not function merely to recentre the eyes once a slow phase has driven them to extreme orbital eccentricities. ...Continue Reading

Citations

Jan 1, 1982·Experimental Brain Research·D Anastasopoulos, T Mergner
Jan 1, 1985·Behavioural Brain Research·J E Tunkl, M A Berkley
Sep 1, 1989·Acta Oto-laryngologica·W H MerwinD L Tomko
Jan 1, 1981·Annals of the New York Academy of Sciences·B W PetersonV J Wilson
Jan 1, 1981·Annals of the New York Academy of Sciences·R BakerR A McCrea
Jan 1, 1991·Movement Disorders : Official Journal of the Movement Disorder Society·M J SteigerC D Marsden
Dec 1, 1995·Journal of Neurology, Neurosurgery, and Psychiatry·P Rudge, A M Bronstein
Apr 18, 2019·Journal of Neurophysiology·Jong-Hoon NamE H Peterson
Jan 1, 1985·Acta Oto-laryngologica·I Pyykkö, A I Dahlen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.