extensors

Where the relation between one group of muscles and another, e.g. between flexors and extensors, is reciprocal, the effect of removal (by trauma or disease) of some influence exerted by another part of the nervous system is commonly two-fold in direction.

Sir Charles Sherrington - Nobel Lecture 1965

In bending, for example, the tension in the extensors is decreased and vice versa.

Physiology or Medicine 1932 - Presentation Speech 1965

The set of muscles that open the wing are called the extensors, and those that close it, the flexors.

Our Bird Comrades 1896

If you you pile the pillows high when sleeping, for example, this may lead to excess stretching of the extensors in the neck, possibly contributing to a forward head posture.

Improve Your Sleep Posture | Lifehacker Australia 2009

In 1959, Bettelheim published a paper titled “Joey, a ‘Mechanical Boy,’ ” in which he described a child “devoid of all that we see as essentially human and childish, as if he did not move his arms or legs but had extensors that were shifted by gears.”

The Panic Virus Seth Mnookin 2011

In 1959, Bettelheim published a paper titled “Joey, a ‘Mechanical Boy,’ ” in which he described a child “devoid of all that we see as essentially human and childish, as if he did not move his arms or legs but had extensors that were shifted by gears.”

The Panic Virus Seth Mnookin 2011

In 1959, Bettelheim published a paper titled “Joey, a ‘Mechanical Boy,’ ” in which he described a child “devoid of all that we see as essentially human and childish, as if he did not move his arms or legs but had extensors that were shifted by gears.”

The Panic Virus Seth Mnookin 2011

It's great work for the back extensors, the lower limbs and the trunk.

Carolyn Scott: Summer Fitness on the Road 2010

It's great work for the back extensors, the lower limbs and the trunk.

Carolyn Scott: Summer Fitness on the Road 2010

To maintain neutral you will have to engage your abdominal and low back muscles, working the low back extensors most as you bend, to stabilize your low back and keep it from rounding.

Abby Sims: How To Shovel Snow Without Hurting Your Back Abby Sims 2010