corrugators

Lastly, Prof. Donders believes (` Archives of Medicine, 'ed. by L. Beale, 1870, vol.v. p. 34), that the corrugators are brought into action in causing the eyeball to advance in accommodation for proximity in vision.

The expression of the emotions in man and animals 1898

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

The expression of the emotions in man and animals 1898

These latter fasciæ by their contraction raise the inner ends alone of the eyebrows; and as the corrugators at the same time draw the eyebrows together, their inner ends become puckered into a fold or lump.

The expression of the emotions in man and animals 1898

The eyebrows are likewise brought together through the simultaneous contraction of the corrugators; 3 and this latter action generates vertical furrows, separating the exterior and lowered part of the skin of the forehead from the central and raised part.

The expression of the emotions in man and animals 1898

THE corrugators, by their contraction, lower the eyebrows and bring them together, producing vertical furrows on the forehead -- that is, a frown.

The expression of the emotions in man and animals 1898

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 expression of the emotions in man and animals 1898

It is, therefore, probable that horror would generally be accompanied by the strong contraction of the brows; but as fear is one of the elements, the eyes and mouth would be opened, and the eyebrows would be raised, as far as the antagonistic action of the corrugators permitted this movement.

The expression of the emotions in man and animals 1898

With savages or other men whose heads are uncovered, the eyebrows are continually lowered and contracted to serve as a shade against a too strong light; and this is effected partly by the corrugators.

The expression of the emotions in man and animals 1898

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.

The expression of the emotions in man and animals 1898

The forehead is wrinkled transversely in many folds, and at the inner extremities of the eyebrows it is strongly furrowed in diverging lines, produced by the powerful and persistent contraction of the corrugators.

The expression of the emotions in man and animals 1898