The Collaborative International Dictionary
Corrugator \Cor"ru*ga`tor\ (k?r"r?-g?`t?r), n. [NL.; cf. F. corrugateur.] (Anat.) A muscle which contracts the skin of the forehead into wrinkles.
Wiktionary
n. 1 A machine that corrugates material. 2 (context anatomy English) The corrugator supercilii, a narrow pyramidal muscle at the medial end of the eyebrow. 3 (context anatomy English) The corrugator cutis ani, a thin stratum of involuntary muscular fibre that radiates from the anal orifice.
Wikipedia
Corrugator may refer to:
- Corrugator supercilii muscle, a small, narrow, pyramidal muscle close to the eye
- Corrugator cutis ani muscle, after the anatomist George Viner Ellis
- Machinery used to manufacture corrugated fiberboard used in boxes
- Machine which is used to produce corrugated stainless steel tubing
Usage examples of "corrugator".
The mentalis, the corrugator, all those little muscles of the face, those are the first things you learn in art school anatomy.
Grace looks up, her eyebrows lifted, the corrugator muscle pleating the spotted skin across her forehead.
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.
Wood, who is so well known for his careful study of the muscles of the human frame, informs me that he believes the account which I have given of the action of the corrugator to be correct.