Terminology of Repetitive Stress Disorders Video

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  • 0:05 Repetitive Work
  • 0:32 Repetitive Stress Disorders
  • 1:35 Examples of RMD
  • 3:42 Lesson Summary
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Lesson Transcript
Instructor: Artem Cheprasov
Repeat, repeat, repeat. It may be good for memorization, but not so much for physical activity if done for too long. Otherwise, one of many different kinds of repetitive stress or motion disorders may arise, some of which will be defined in this lesson.

Repetitive Work

People who work in assembly lines are known to suffer from mental fatigue due to the repetitive nature of their work. They also suffer from muscle fatigue from the repetitive nature of their work. They may develop one of many different kinds of repetitive stress disorders as a result of this, including carpal tunnel syndrome, which will be covered in more detail in another lesson. Here we'll define repetitive stress disorders, name some of them, and define them.

Repetitive Stress Disorders

Repetitive stress disorders, also known as repetitive motion disorders (RMDs), are a group of conditions that arise from the repeated motions performed in a person's daily activities, such as work, sports, and hobbies. Basically, if, like an assembly line worker or a musician, you perform way too many uninterrupted repetitive motions, or you perform a motion in an awkward position, you are at risk for developing a repetitive motion disorder.

The parts of your body that are most likely to develop these problems include the shoulder, elbow, wrist, and hands. When such an area is affected, you can expect pain in the area, a tingling sensation, as well as signs of inflammation, like redness and swelling. You may also experience numbness and a loss of strength and/or flexibility as well. Besides assembly line workers, people who may be susceptible to RMDs include musicians, janitors, athletes, and computer workers.

Examples of RMD

So, now that you know what can happen, where, and to whom, let's define some specific types of RMDs.

One is tendinitis, the inflammation of a tendon, and a similar one is tenosynovitis, the inflammation of a tendon's sheath, where 'teno-' and 'tendin-' means 'tendon,' 'synov-' refers to the 'synovial sheath' enveloping the tendon, and '-itis' is the 'inflammation' of something. A tendon is a band of tissues that connects muscle to bone. The term tenosynovitis sometimes implies that both the tendon itself and its synovial sheath are inflamed at the same time.

A specific kind of tenosynovitis, called stenosing (narrowing) tenosynovitis or trigger finger or trigger thumb, is a condition where a finger or thumb will lock in place. When a person tries to move the finger, they can hear a pop or click, similar to a trigger, hence the term trigger finger.

Another RMD is bursitis, the inflammation of a bursa, where 'burs-' means 'bursa.' A bursa is a small pouch, like a cushion of sorts, which is found in the body where friction occurs. So, bursae are found where muscles or tendons glide over bony surfaces.

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