extensor muscle
1
5.2
- noun
- /ɪkˈstɛnsər ˈmʌsəl/
- Specialized
:
músculo extensor
- The extensor muscles in your arms are essential for pushing and reaching movements.
- hip extensor muscle
- trunk extensor muscles
- flexor and extensor muscles
Examples
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Persons with CLBP demonstrate reduced endurance of trunk flexor and extensor muscles.
Academic text (1997) -
For any given hip flexion angle between 5 degrees and 25 degrees, stimulation of the hip extensor muscles that produce the highest extension moment should yield standing with the least arm forces.
Academic text (2001) -
Future studies should investigate methods to improve the recruitment properties of the hip extensor muscles through innovative designs.
Academic text (2001) -
The custom testing jig allowed the individual application of extensor muscle forces along the orientation of principal muscle fibers.
Academic text (2001) -
Although trunk flexor and extensor muscles are physiologically postural muscles, they are active throughout most activities, including quiet standing.
Academic text (1997) -
Indeed, recent studies with such patients have shown a significant increase in electromyographic (EMG) activity in the leg extensor muscles during training, an effect that was shown to be connected with improvement of locomotor function (4, 5).
Academic text (2000) -
More vertical postures (smaller hip flexion angles) improve the effectiveness of the hip extensor muscles in reducing the support forces placed on the arms.
Academic text (2001) -
Six human cadaveric knees were used along with a patellofemoral joint testing jig that permits physiological loading of the knee extensor muscles.
Academic text (2001) -
Endurance testing of trunk muscles examines the localized capability of the flexor and extensor muscles of the trunk to sustain activity.
Academic text (1997) -
After subjects achieved a steady upright posture with all hip extensors active, the hip extensor muscles of one leg were alternately turned off and on for a fixed interval in random order until five "off" periods and six "on" periods were obtained in a single standing trial.
Academic text (2001)
Synonyms
3
7.2
A muscle that straightens a limb like an arm or leg when it tightens
A muscle that straightens the spine and helps keep the back upright
Surface Forms
Morphology
The compound is directly compositional: 'extensor' specifies a muscle whose function is extension and 'muscle' names the tissue, so the phrase literally denotes a muscle that straightens or extends a limb. This follows regular English noun-modifier composition and has close equivalents in many languages (e.g. Spanish 'músculo extensor'), making the meaning predictable for learners who know the constituent words.
Etymology
Extensor muscle is a name that shows its job: the word extensor means 'to extend' and muscle is the part of the body that pulls. So when an extensor muscle pulls, it straightens a limb or joint, which is why the name means 'to straighten'.