Related Experiment Video
Updated: Mar 17, 2026

09:48
A Friction Testing-Bioreactor Device for Study of Synovial Joint Biomechanics, Mechanobiology, and Physical Regulation
Published on: June 2, 2022
3.6K
Forum.
D K Lurie1, D R Clawson2, S Zernich3
1a Washington , DC.
The Physician and Sportsmedicine
|July 28, 2016
Summary
This section invites readers to share unique medical treatments, opinions on controversial topics, or interesting patient cases. Submit your insights and case studies to our Forum for publication.
Area of Science:
- Medical Science
- Clinical Practice
- Reader Engagement
Background:
- The Physician and Sportsmedicine journal values reader contributions.
- A platform is needed for sharing diverse medical insights and opinions.
Purpose of the Study:
- To establish a reader forum for diverse medical discourse.
- To encourage the sharing of clinical experiences and viewpoints.
Main Methods:
- Readers are invited to submit their ideas, treatments, and case reports.
- Correspondence should be addressed to the Forum section.
- Illustrations are welcomed with submissions.
Main Results:
- The journal serves as a sounding board for medical professionals.
- Diverse perspectives on common medical problems and treatments are encouraged.
Conclusions:
- The Forum facilitates open discussion and knowledge exchange among readers.
- Reader contributions enrich the medical community's understanding and practice.
Related Concept Videos
Torque Free Motion
899
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
899
Journal Bearings
1.3K
Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
To better understand the concept of journal bearings, consider a rope winch with dry or...
1.3K
Motor Units
9.4K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
9.4K
Motor Units
62.6K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
62.6K
Torque
23.3K
Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
23.3K
G-protein Coupled Receptors
133.7K
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
133.7K
