Systems, devices, and methods for treating vestibular conditions
Apparatus and methods are described herein that provide a vibratory device that can apply a vibratory signal to a portion of a head of a user such that the vibratory signal can be conducted via bone to a vestibular system of the user and cause a portion of the vestibular system to move in a manner equivalent to that of a therapeutically effective vibratory signal applied to an area overlaying a mastoid bone of the user. The vibratory device can be associated with frequencies less than 200 Hz. The vibratory device can be effective at treating a physiological condition associated with the vestibular system.
1. An apparatus, comprising:
a vibratory device configured to produce one or more vibratory signals having a frequency of less than 200 Hz and a force level greater than 87 dB re 1 dyne and less than or equal to 101 dB re 1 dyne, the vibratory device including:
a housing defining a chamber;
a magnet disposed within the chamber and configured to oscillate about an equilibrium position to produce the one or more vibratory signals; and
a coil configured to generate a magnetic field, the magnetic field being configured to cause the magnet to oscillate; and
a head-mounted structure configured to position the vibratory device over a portion of a head of a user to apply the one or more vibratory signals produced by the vibratory device to the portion of the head of the user such that a portion of the one or more vibratory signals is conducted via bone to a vestibular system of the user and causes movement of a portion of the vestibular system that treats a physiological condition associated with the vestibular system.
2. The apparatus of claim 1 , wherein the vibratory device further includes a set of metallic components coupled to ends of the magnet and configured to reduce stray magnetic flux and direct a magnetic field of the magnet in a direction for enabling oscillation of the magnet.
3. The apparatus of claim 1 , further comprising:
a sensor configured to measure an electrical characteristic of the vibratory device, the electrical characteristic including at least one of a voltage, a current, an impedance, a magnetic field, or an acceleration associated with one or more components of the vibratory device;
a processor operatively coupled to the vibratory device and the sensor, the processor configured to adjust a frequency of an electrical signal supplied to the coil to generate the magnetic field based on measurements received from the sensor.
4. The apparatus of claim 1 , further comprising:
a sensor configured to measure a biological characteristic of the user that is indicative of an onset of the physiological condition or a change in severity of the physiological condition; and
a processor operatively coupled to the vibratory device and the sensor, the processor configured to control the vibratory device to produce the one or more vibratory signals based on measurements received from the sensor.
5. The apparatus of claim 4 , wherein the biological characteristic includes at least one of: body temperature, skin conductance, electrical activity of a brain of the user, electrical activity of muscle tissue of the user, electrical activity of a heart of the user, heart rate, changes associated with an eye of the user, blood pressure, oxygen saturation, nerve evoked potentials, sweat toxicology, or level of stress hormones.
6. The apparatus of claim 4 , wherein the processor is configured to control the vibratory device by activating the vibratory device to produce the one or more vibratory signals or increasing power supplied to the vibratory device to increase the force level of the one or more vibratory signals.
7. The apparatus of claim 1 , wherein the vibratory device further comprises one or more elastic elements configured to suspend the magnet in the chamber such that the magnet can oscillate about the equilibrium position.
8. The apparatus of claim 7 , wherein the one or more elastic elements includes a spring having a first end attached to the housing and a second end disposed within an opening formed in the magnet.
9. The apparatus of claim 7 , wherein the one or more elastic elements includes at least two springs each defining an opening through which the magnet moves when the magnet oscillates about the equilibrium position.
10. The apparatus of claim 7 , wherein the one or more elastic elements includes at least two annular pieces of elastic material disposed about an outer perimeter of the magnet at different positions along a longitudinal length of the magnet.
11. The apparatus of claim 7 , wherein the vibratory device further includes one or more end plates each coupled to the magnet,
at least one elastic element from the one or more elastic elements is coupled to at least one end plate from the one or more end plates.
12. The apparatus of claim 1 , wherein the physiological condition includes at least one of: vertigo, dizziness, motion sickness, virtual reality sickness, spatial discordance, sopite syndrome, nausea, headache, migraine, or tinnitus.
13. The apparatus of claim 1 , wherein the head-mounted structure is a head gear configured to be worn by the user including at least one of head phones or earphones.
14. The apparatus of claim 1 , wherein the head-mounted structure is a head band configured to be worn by the user.
15. The apparatus of claim 1 , wherein the head-mounted structure is an eyewear configured to be worn by the user including at least one of: eyeglasses, goggles, sunglasses, or safety glasses.
16. The apparatus of claim 1 , wherein the head-mounted structure is a headset configured to be worn by the user as a virtual reality device.
17. The apparatus of claim 1 , wherein the magnet is a first magnet and the vibratory device further comprises a pair of magnets including a second magnet and a third magnet, the pair of magnets configured to suspend the first magnet in the chamber such that the first magnet can oscillate about the equilibrium position.
18. The apparatus of claim 1 , wherein the coil is further configured such that the magnetic field generated is an alternating magnetic field that causes the magnet to oscillate along a longitudinal axis of the vibratory device.
19. The apparatus of claim 1 , wherein the coil is further configured such that the magnetic field generated causes the magnet to oscillate along a longitudinal axis of the vibratory device while being restricted from vibrating along axes other than the longitudinal axis.
20. The apparatus of claim 1 , further comprising:
a sensor configured to determine a measurement of a biological characteristic of the user that is indicative of an onset of the physiological condition or a change in severity of the physiological condition; and
a processor operatively coupled to the vibratory device and the sensor, the processor configured to control the vibratory device to modify at least one of the force level or the frequency of the one or more vibratory signals based on the measurement.