Related Experiment Video
Updated: Mar 29, 2026

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
Published on: May 23, 2013
Olivocochlear efferent reflex strength in vestibular schwannoma patients
Problem/Objective:
The olivocochlear reflex strength can be measured using contralateral acoustic stimulation (CAS) of transient evoked otoacoustic emissions (TEAOEs). The efferent suppression (ES) thus reflects the functional intactness of the efferent auditory system. In patients with unilateral vestibular schwannoma (VS), the results of ES are unclear.
Methods:
This cross-sectional study evaluated click and noise intensity conditions for measuring ES using CAS of TEOAEs in nine patients with unilateral VS and in gender-, age- and ear side-matched control subjects.
Results:
Two optimal click and noise intensity level combinations were identified. This pilot study compared the amount of ES between tumour and non-tumour ears versus control ears in patients with unilateral VS, but there were no statistically significant differences.
Conclusion:
Future studies should include a larger population of unilateral VS patients with different grades of hearing loss.
Related Concept Videos
The Vestibular System
Equilibrium and Balance
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...
Anatomy of the Ear

