Neurophysiology: Vertigo in MRI Machines
نویسندگان
چکیده
Subjects of brain-imaging studies often report experiencing vertigo while in MRI machines; a new study shows that the magnetic field stimulates the vestibular sensors in the inner ear by a Lorentz force.
منابع مشابه
A trail of artificial vestibular stimulation: electricity, heat, and magnet.
The interaction between the magnetic field of a magnetic resonance imaging (MRI) machine and ion currents within the inner-ear endolymph results in a Lorentz force. This force produces a pressure that pushes on the cupula within the semicircular canals causing nystagmus and vertigo. Here I discuss several implications of this unique and noninvasive way to stimulate the vestibular system in expe...
متن کاملNeuro Forum A trail of artificial vestibular stimulation: electricity, heat, and magnet
Shaikh AG. A trail of artificial vestibular stimulation: electricity, heat, and magnet. J Neurophysiol 108: 1–4, 2012. First published March 28, 2012; doi:10.1152/jn.01169.2011.—The interaction between the magnetic field of a magnetic resonance imaging (MRI) machine and ion currents within the inner-ear endolymph results in a Lorentz force. This force produces a pressure that pushes on the cupu...
متن کاملبررسی عوامل مرتبط با سرگیجههای ثانویه به علل عروقی تایید شده با (MRI(DWI مغزی
Background & Aims: Dizziness, vertigo and imbalance are common complains in patients referring to neurological clinics. In this article we are to find the factors related to secondary vertigo due to vascular causes verified with Brain-MRI (DWI). Materials & Methods: This study was conducted on 119 patients who were categorized into positive and negative groups for acute cerebrovascular cause...
متن کاملGeneral vestibular testing.
A dysfunction of the vestibular system is commonly characterized by a combination of phenomena involving perceptual, ocular motor, postural, and autonomic manifestations: vertigo/dizziness, nystagmus, ataxia, and nausea. These 4 manifestations correlate with different aspects of vestibular function and emanate from different sites within the central nervous system. The diagnosis of vestibular s...
متن کاملMagnetic Vestibular Stimulation (MVS) As a Technique for Understanding the Normal and Diseased Labyrinth
Humans often experience dizziness and vertigo around strong static magnetic fields such as those present in an MRI scanner. Recent evidence supports the idea that this effect is the result of inner ear vestibular stimulation and that the mechanism is a magnetohydrodynamic force (Lorentz force) that is generated by the interactions between normal ionic currents in the inner ear endolymph and the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Current Biology
دوره 21 شماره
صفحات -
تاریخ انتشار 2011