Related Experiment Video
Updated: Jan 30, 2026

08:07
Paradigms of Lower Extremity Electrical Stimulation Training After Spinal Cord Injury
Published on: February 1, 2018
13.2K
Injuries Associated With Standing Electric Scooter Use
Tarak K Trivedi1,2,3, Charles Liu1,2,4,5, Anna Liza M Antonio6
1Veterans Administration, Greater Los Angeles Healthcare System, Los Angeles, California.
JAMA Network Open
|January 26, 2019
Summary
Electric scooter injuries are a growing concern, with fractures and head injuries being common. Helmet use is very low, especially among riders under 18, highlighting a need for better safety policies.
Area of Science:
- Public Health
- Emergency Medicine
- Transportation Safety
Background:
- Standing electric scooters have rapidly increased in popularity since 2017.
- Despite regulations, common usage patterns and injury data remain largely unknown.
- This study addresses the emerging public health issue of electric scooter-related injuries.
Purpose of the Study:
- To characterize injuries from standing electric scooters.
- To analyze clinical outcomes of injured patients.
- To observe common rider practices in an early-adopting US metropolitan area.
Main Methods:
- Retrospective cohort study of emergency department patients (Sept 2017-Aug 2018).
- Medical record review for injury details and outcomes.
- Direct observation of electric scooter riders at public intersections.
Main Results:
- 249 patients presented with injuries; 91.6% were riders.
- Common injuries included fractures (31.7%) and head injuries (40.2%).
- Helmet use was low (4.4% of riders), and 10.8% of injured patients were under 18.
Conclusions:
- Electric scooter injuries represent a new and significant public health challenge.
- Low helmet usage and injuries in minors underscore safety concerns.
- Findings may inform future public policy and safety interventions for electric scooter use.
More Related Videos
Related Concept Videos
Standing Waves
5.4K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
5.4K
Modes of Standing Waves - I
4.0K
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
4.0K
Modes of Standing Waves: II
1.7K
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
1.7K
Standing Waves in a Cavity
1.5K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.5K
Standing Electromagnetic Waves
2.3K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
2.3K
Finding Electric Potential From Electric Field
5.6K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
5.6K

