Systems and devices for treating equilibrium disorders and improving gait and balance
Embodiments herein relate to systems, devices and methods for the treatment of equilibrium disorders and improving gait and balance. In an embodiment, a method of treating an equilibrium disorder is included. The method can include monitoring device wearer movement with a movement sensor, identifying a movement pattern consistent with an equilibrium disorder, estimating characteristics of the equilibrium disorder, and applying stimulation to at least one of the right ear, left ear, or brainstem of the device wearer of an ear-worn device. Other embodiments are also included herein.
1 . A method of treating an equilibrium disorder comprising:
monitoring movement of an ear-worn device wearer with a movement sensor integrated into an ear-worn device that is configured to be at least partially inserted into an ear canal of the device wearer;
identifying a movement pattern consistent with an equilibrium disorder;
estimating characteristics of the equilibrium disorder;
identifying that the movement pattern is consistent with sustained cyclical strides; and
applying auditory stimulation to at least one of the right ear, left ear, or brainstem of the ear-worn device wearer at a cyclical frequency using an electroacoustic transducer of the ear-worn device, wherein the cyclical frequency equals an ambulatory pace.
2 . The method of claim 1 , the characteristics of the equilibrium disorder relating to at least one of a site of a lesion, the ear-worn device wearer's perceived head position versus actual head position, and the ear-worn device wearer's perceived head movement versus actual head movement.
3 . The method of claim 1 , further comprising measuring signals associated with a directional movement in the horizontal plane of the device wearer; and
measuring a stride length of the device wearer based on the identified phases of the stride cycle and the directional movement of the device wearer.
4 . The method of claim 1 , wherein identifying a movement pattern consistent with sustained cyclical strides comprises identifying a movement pattern consistent with sustained cyclical strides that is sustained for at least 3 seconds.
5 . The method of claim 1 , further comprising
analyzing data from the movement sensor to determine a sustained cyclical stride pace of the device wearer; and
applying cyclical auditory stimulation to at least one of the right or left ear using the ear-worn device at a pace that is faster than the determined sustained cyclical stride pace when the determined sustained cyclical stride pace is below a threshold value.
6 . The method of claim 1 , further comprising
adaptively determining a threshold value for the device wearer; and
applying cyclical auditory stimulation to at least one of the right or left ear using the ear-worn device at a pace that is slower than the determined sustained cyclical stride pace when the determined sustained cyclical stride pace is above a threshold value.
7 . The method of claim 1 , wherein identifying that the movement pattern is consistent with sustained cyclical strides is performed using a microphone that is integrated into the ear-worn device.
8 . The method of claim 1 , further comprising:
identifying phases in the sustained cyclical strides; and
detecting a shuffling-type gait by detecting variability in a timing of the phases of the sustained cyclical strides that cross a predetermined threshold value.
9 . An ear-worn device system comprising:
an ear-worn device comprising
a control circuit;
a sensor package in communication with the control circuit;
a power supply circuit in electrical communication with the control circuit;
wherein a portion of the ear-worn device is configured to be inserted into a first ear canal of an ear-worn device wearer;
a second ear-worn device comprising:
a second control circuit;
a second sensor package in communication with the control circuit;
a second power supply circuit in electrical communication with the control circuit;
wherein a portion of the second ear-worn device is configured to be inserted into a second ear canal of the ear-worn device wearer;
wherein the system is configured to
monitor ear-worn device wearer movement with a movement sensor integrated into the ear-worn device;
identify a movement pattern consistent with an equilibrium disorder;
estimate the characteristics of the equilibrium disorder;
determine that the equilibrium disorder originates from one of the first ear or the second ear; and
apply stimulation differentially based on the determination of the origin of the equilibrium disorder, the stimulation comprising at least one of caloric stimulation, nerve stimulation, auditory stimulation, electromagnetic stimulation, and optical stimulation.
10 . The system of claim 9 , wherein the system is further configured to monitor the ear-worn device wearer movement with the movement sensor after the application of stimulation and adjusting ongoing application of stimulation based on detected movement.
11 . The system of claim 10 , the ear-worn device wearer movement comprising eye movement.
12 . The system of claim 10 , the movement pattern comprising nystagmus.
13 . The system of claim 9 , wherein estimating the characteristics of the equilibrium disorder includes estimating the lateral distribution of the equilibrium disorder.
14 . The system of claim 9 , wherein estimating the characteristics of an equilibrium disorder comprises determining aspects of nystagmus including two or more of a fast phase velocity, a slow phase velocity, a direction of nystagmus beating, a directional preponderance, and a gaze angle.
15 . The system of claim 9 , the ear-worn device further comprising a heating element or a heat sink.
16 . The system of claim 9 , the ear-worn device further comprising an earbud configured to be inserted into an ear canal of the ear-worn device wearer.
17 . The system of claim 16 , the earbud comprising a stimulation transducer configured to apply the stimulation to the ear-worn device wearer.
18 . The system of claim 9 , wherein the system is further configured to, upon determining that the equilibrium disorder originates from the first ear, applying a higher level of stimulation to the first ear than to the second ear.
19 . The system of claim 9 , wherein the system is further configured to, upon determining that the equilibrium disorder originates from the first ear, applying a different type of stimulation to the first ear than to the second ear.
20 . The system of claim 9 , wherein the system is further configured to:
determine that the equilibrium disorder originates the first ear; and
apply stimulation differentially to the first ear.