Related Experiment Video
Updated: Jun 21, 2026

Ocular Kinematics Measured by In Vitro Stimulation of the Cranial Nerves in the Turtle
Published on: June 2, 2018
Trunk-ocular reflex in man
1Department of Physiology, Hokkaido University School of Medicine, Sapporo, 060, Japan.
Abstract:
The experiments were designed to determine whether twisting of the trunk induces eye movements in man. The subject's head and neck were fixed firmly, and the chair in which the subject sat was turned along a vertical axis sinusoidally at about 1 4 Hz . It was found that the eye deviated horizontally in a direction counter to the twisting of the lower trunk. This ocular movement was accompanied by nystagmus. The gain (the ratio of ocular movement to chair movement) of the trunk-ocular reflex appeared to be about 0.5 with time lag of around 80 msec.
Related Concept Videos
Accessory Structures of the Eye
Muscles of the Eye
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Reflex Activity
A reflex exam is a diagnostic procedure performed by a healthcare professional to evaluate the functionality of a patient's...
Somatic Spinal Reflexes
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
The Micturition Reflex
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating urine...
Glaucoma: Overview

