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An invention created at home turned a family problem into a scientific project, international award, and an academic trajectory linked to the brain, technology, and the care of people with Alzheimer’s.
When Kenneth Shinozuka’s grandfather got up during the night, a seemingly ordinary step could initiate an anxious search.
Diagnosed with Alzheimer’s, the elderly man would get out of bed, walk without guidance, suffer falls, and on some occasions, end up lost.
The family needed to remain alert, especially the teenager’s aunt, who was responsible for care during the night.
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It was by observing his grandfather’s feet touch the ground that Kenneth found the starting point for a solution.
At 14 years old, he imagined that a pressure sensor attached to a sock could recognize that first step and immediately send an alert to a caregiver’s phone.
The project combined a weight-sensitive material, a wireless circuit, and an app developed by the student himself.
The invention emerged in 2014 and made Kenneth known in scientific competitions, but his journey did not stop at the so-called “smart sock.”
Years later, he graduated in neuroscience from Harvard University, completed a doctorate in psychiatry at the University of Oxford, and began working as a postdoctoral researcher in the Department of Psychiatry and Behavioral Sciences at Stanford University, in the United States.
Currently, his studies are linked to neuroscience and experimental treatments for psychiatric disorders.
Alzheimer in the family inspired the invention
Kenneth grew up in a household where three generations of the same family lived together.
From a young age, he closely followed the difficulties faced by his grandparents and sought ways to use sensors to make the home safer.
When he was six years old, he envisioned a system to detect falls in the bathroom.
The project involved installing sensors on the floor, connected to a device that would emit an alert if one of the grandparents fell.
The idea received recognition at a science fair but did not advance beyond the experimental phase.
Nevertheless, the interest in technologies aimed at the safety of the elderly persisted and would be revisited years later when his grandfather’s health condition worsened.
With the progression of Alzheimer’s, the episodes of nighttime disorientation became more frequent.
The elderly man would get out of bed to go to the bathroom, but he might forget where he was or be unable to find his way back.
The situation also affected the family’s rest.
Kenneth’s aunt, who directly cared for the grandfather, needed to monitor movements during the night to try to prevent falls or unaccompanied outings.
Sensor in the sock detected the first step
The inspiration for the device came during one of these episodes.
Kenneth realized that before walking or leaving the room, his grandfather would necessarily put his feet on the ground.
The teenager concluded that this movement could serve as an early signal.
Instead of trying to locate the elderly man after he had already left, the system would alert the caregiver the moment the person left the bed.
The concept was based on three steps.
First, a sensor detected the pressure exerted by the body’s weight.
Next, a wireless circuit processed the signal.
Finally, an app sent the alert to the family member’s or caregiver’s phone.
Although the story’s title is often summarized as a sock connected to the phone, it was not the fabric that transmitted the information.
The central component was a flexible sensor attached to the foot area and connected to a small electronic circuit.
How the smart sock worked
The development was divided into three parts: designing the sensor, assembling the circuit, and creating the app. Each phase required testing to ensure the device was light, sensitive, and capable of functioning throughout the night.
Kenneth experimented with different materials before producing a film capable of measuring pressure.
The sensor monitored changes in electrical resistance caused when the user placed their foot on the ground.
In simple terms, the material altered its electrical behavior when pressed. This change was recognized by the circuit as a signal that the grandfather had gotten up.
To transmit the information, the teenager used low-energy Bluetooth.
The technology allowed the system to remain active for longer periods without requiring a large battery or constant recharges.
As soon as the sensor detected the body’s weight, the circuit sent the alert to the app.
The caregiver received the notification before the elderly person had time to move away from the bed or leave the room.
The first prototype was tested by his own grandfather.
During a presentation at TEDYouth in November 2014, Kenneth stated that the device had identified over 900 known bed exit episodes over approximately a year of testing.
The accuracy rate was reported by the inventor and does not correspond to an independent clinical evaluation.
Kenneth Shinozuka’s project received a $50,000 award
The invention led Kenneth to the 2014 Google Science Fair global finals.
That year, the student received the Scientific American Science in Action Award, a $50,000 prize aimed at projects with the potential to address social, environmental, or health issues.
The recognition allowed the idea to move beyond just a home prototype.
Kenneth created SensaRx, a company formed to turn the system into a product aimed at families, caregivers, and long-term care institutions.
The initial version became known as the SafeWander Sock Sensor.
Later, the team modified the format because some users did not remain in socks during the night.
The sensor was then attached to the patient’s clothing via a button.
When the person got up from the bed or a chair, the movement triggered the system and sent the alert to the caregiver’s device.
According to the institutional page of SafeWander, the commercial bed exit alarm model was launched at the end of 2015.
The company also reported having expanded production through a partnership with a manufacturer, but the page does not present a recent date for this update.
Technology alerted the caregiver without restricting movement
The system did not block the person, lock doors, or physically prevent the user from getting out of bed.
Its function was to quickly inform the caregiver that movement had started.
This difference was important for the device’s proposal.
The alert allowed for human intervention without requiring cameras installed in the room or rigid equipment on the patient’s body.
The device also did not treat Alzheimer’s disease nor eliminate episodes of disorientation.
It acted only as a monitoring tool for situations where a person might get up without assistance.
In addition to cases of dementia, later versions were presented as aids for patients at risk of falling.
The utility depended on each user’s conditions, proper installation, and the presence of someone able to respond to the alert.
Inventor pursued a career in neuroscience
After the project’s impact, Kenneth maintained his education linked to health and technology.
At Harvard University, he studied neuroscience and participated in research related to Alzheimer’s, consciousness, and time perception.
The next step was a doctorate in psychiatry at the University of Oxford.
During this stage, he focused part of his studies on research about psychedelic substances and their possible effects on the brain.
At Stanford, he began investigating brain data and experimental applications of these substances in psychiatric conditions.
The university’s official profile identifies him as a postdoctoral researcher in psychiatry and behavioral sciences.
Among the works published with his participation are analyses of ketamine, MDMA, ibogaine, and other substances studied in therapeutic contexts.
These treatments require clinical research, safety evaluation, and medical supervision, and should not be confused with the recreational use of the same drugs.
The academic trajectory represents a shift from the first project but maintains the connection with the brain and problems observed within his own family.
The idea created to notify that his grandfather had put his foot on the ground ended up leading Kenneth to studies on behavior, consciousness, and neurological and psychiatric disorders.
