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University of Nebraska–Lincoln

Environmental Health & Safety

Committed to Excellence

GLOSSARY OF ERGONOMICS TERMS

Anthropometry - Science that deals with the size, mass, and shape of the human body and its components.

Biomechanics
- Science that uses engineering concepts to describe motions of the body.

CTD (Cumulative Trauma Disorder)
- Premature wear and tear damage to specific body structures.

Carpal Tunnel
- Tunnel formed by the carpal ligament and the bones of the wrist.

Carpal Tunnel Syndrome
- Disorder associated with impingement to the median nerve as it travels through the wrist.

De Quervain's Disease
- A common type of stenosing tenosynovitis (combination of tenosynovitis and tendinitis).

Epicondylitis
- Technical term for "tennis elbow".

Ergonomics
- An applied science that seeks to design work requirements to within human capabilities.

Ergonomic Risk Factors
- Conditions of a job, process, or operation that contribute to the risk of developing Cumulative Trauma Disorders.

Fatigue
- A reduction in the ability to exert force in response to voluntary effort.

Force
- An action that changes the state of rest or motion of a body to which it is applied.

Kinesiology
- The study of human movements as a function of the construction of the musculoskeletal system.

Lifting Index
- Ratio between load being handled and the recommended weight limit.

Ligament - Connective tissue attaching bone to bone.

Mechanical Stress
- Pressure to the skin and soft tissues from direct contact with parts, tools, fixtures, etc.

Median Nerve
- Nerve feeding the thumb and first two fingers of the hand.

Muscloskeletal Disorders
- Disorders and diseases of the muscles, connective tissues, and surrounding neural tissues.

Optimal Work Area
- Area in front of the body defined by the keeping the back straight, the shoulders neutral, and the hands between hand rest and elbow height.

Personal Risk Factor
- Personal characteristics that increase the likelihood that an individual will develop a work-related musculoskeletal disorder.

Physiology
- Science that measures people's capacity to do work and their body's reaction t o doing work.

Radial Deviation
- Any noticeable deviation of the wrists toward the thumb.

Reaction Torque
- Force created when a threaded fastener forms a solid joint during the run-down phase.

Risk Factors
- Conditions that increase the likelihood of a certain outcome. WMSD risk factors are conditions that increase the likelihood of developing a work-related musculoskeletal disorder.

Sprain
- Injury to ligaments around a joint.

Strain
- Injury to muscle or tendon.

Synovia
- Membranes lining the inside of joint capsules and moving surfaces of joints. They secrete the synovial fluid, which lubricates joints.

Tendinitis
- Swelling in the tendons, resulting in pain.

Tendon
- Connective tissue that transmits the force from muscles to the bone.

Tenosynovitis
- Swelling in the tendon and tendon sheath, resulting in pain.

Ulnar Deviation
- Any noticeable deviation of the wrist opposite the thumb.

Upper Extremities
- The arms and hands and associated joints

Whole Body Fatigue
- An overall reduction in the ability to exert force in response to voluntary effort.

WMSD (Work-Related Musculoskeletal Disorder)
- Disorders and diseases of the muscles, connective tissues, and surrounding neural tissues that are caused or aggravated by work causal factors.