Related Experiment Video
Updated: Jun 9, 2025
06:30
Assessment of Static Graviceptive Perception in the Roll-Plane using the Subjective Visual Vertical Paradigm
Published on: April 28, 2020
5.7K
Vestibular Disorders Limited to the Vertical Semicircular Canals
Pedro Luiz Mangabeira Albernaz1, Flavia Salvaterra Cusin2, Bernardo Faria Ramos3
1Department of Otolaryngology, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
International Archives of Otorhinolaryngology
|October 28, 2024
Summary
The video head impulse test (vHIT) now allows evaluation of vertical semicircular canal disorders. These specific vestibular disorders, affecting 2.63% of patients, can stem from various labyrinthine diseases.
Area of Science:
- Neurology
- Otolaryngology
- Vestibular System Physiology
Background:
- The video head impulse test (vHIT) has advanced the assessment of all six semicircular canals.
- Vestibular disorders specifically affecting the vertical semicircular canals require focused investigation.
Purpose of the Study:
- To investigate and characterize vestibular disorders exclusively impacting the vertical semicircular canals.
- To evaluate the utility of vHIT in diagnosing these specific vestibular dysfunctions.
Main Methods:
- A cohort of 9,891 patients underwent vHIT assessment.
- Identified 26 patients (2.63%) with reduced vestibulo-ocular reflex (VOR) limited to vertical canals.
- All identified patients reported vestibular symptoms.
Main Results:
- The 26 patients exhibited diverse vestibular system disorders.
- Ten of these patients were diagnosed with vestibular neuritis.
- vHIT successfully identified and evaluated these isolated vertical canal deficits.
Conclusions:
- Vestibular disorders confined to the vertical semicircular canals are now diagnosable using vHIT.
- These specific deficits can be associated with a range of labyrinthine diseases.
- vHIT provides a crucial tool for understanding and managing vertical semicircular canal pathologies.
Related Concept Videos
01:15Equilibrium and Balance
4.5K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
4.5K
01:29The Vestibular System
39.4K
The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
39.4K
01:28Major Somatic Sensory Pathways
910
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
910
01:22Indirect Motor Pathways
1.4K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
1.4K
01:17Auditory Perception
320
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
320
01:16Anatomy of the Ear
7.3K
Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
7.3K