What is "corrugators"

Usage examples of "corrugators".

Frowning, which is one of the most important of all the expressions in man, is due to the contraction of the corrugators by which the eyebrows are lowered and brought together, so that vertical furrows are formed on the forehead.

The corrugators of the brow (corrugator supercilii) seem to be the first muscles to contract.

The orbicular muscles contract almost simultaneously with the corrugators, and produce wrinkles all round the eyes.

The eyebrows assume this position owing to the contraction of certain muscles (namely, the orbiculars, corrugators, and pyramidals of the nose, which together tend to lower and contract the eyebrows) being partially checked by the more powerful action of the central fascim of the frontal muscle.

I repeatedly observed my own infants, from under the age of one week to that of two or three months, and found that when a screaming-fit came on gradually, the first sign was the contraction of the corrugators, which produced a slight frown, quickly followed by the contraction of the other muscles round the eyes.

It is not surprising that the corrugators should have become much more developed in man than in the anthropoid apes.

When the eyes are closed as quickly and as forcibly as possible, to save them from being injured by a blow, the corrugators contract.

For the habit of frowning seems to have been acquired chiefly from the corrugators being the first muscles to contract round the eyes, whenever during infancy pain, anger, or distress is felt, and there consequently is a near approach to screaming.