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The Expression of Emotion in Man and Animals [6]

By Root 1628 0
See, also, a description of several of the facial muscles in the Chimpanzee, by Prof. Macalister, in `Annals and Magazine of Natural History,' vol. vii. May, 1871, p. 342.

[14] `Anatomy of Expression,' pp. 121, 138.

Although Gratiolet emphatically denies[15] that any muscle has been developed solely for the sake of expression, he seems never to have reflected on the principle of evolution. He apparently looks at each species as a separate creation. So it is with the other writers on Expression. For instance, Dr. Duchenne, after speaking of the movements of the limbs, refers to those which give expression to the face, and remarks:[16] "Le createur n'a donc pas eu a se preoccuper ici des besoins de la mecanique; il a pu, selon sa sagesse, ou--que l'on me pardonne cette maniere de parler--par une divine fantaisie, mettre en action tel ou tel muscle, un seul ou plusieurs muscles a la fois, lorsqu'il a voulu que les signes caracteristiques des passions, meme les plus fugaces, lussent ecrits passagerement sur la face de l'homme. Ce langage de la physionomie une fois cree, il lui a suffi, pour le rendre universel et immuable, de donner a tout etre humain la faculte instinctive d'exprimer toujours ses sendments par la contraction des memes muscles."

Many writers consider the whole subject of Expression as inexplicable. Thus the illustrious physiologist Muller, says,[17] "The completely different expression of the features in different passions shows that, according to the kind of feeling excited, entirely different groups of the fibres of the facial nerve are acted on. Of the cause of this we are quite ignorant."

[15] `De la Physionomie,' pp. 12, 73.

[16] `Mecanisme de la Physionomie Humaine,' 8vo edit. p. 31.

[17] `Elements of Physiology,' English translation, vol. ii. p. 934.

No doubt as long as man and all other animals are viewed as independent creations, an effectual stop is put to our natural desire to investigate as far as possible the causes of Expression. By this doctrine, anything and everything can be equally well explained; and it has proved as pernicious with respect to Expression as to every other branch of natural history. With mankind some expressions, such as the bristling of the hair under the influence of extreme terror, or the uncovering of the teeth under that of furious rage, can hardly be understood, except on the belief that man once existed in a much lower and animal-like condition. The community of certain expressions in distinct though allied species, as in the movements of the same facial muscles during laughter by man and by various monkeys, is rendered somewhat more intelligible, if we believe in their descent from a common progenitor. He who admits on general grounds that the structure and habits of all animals have been gradually evolved, will look at the whole subject of Expression in a new and interesting light.

The study of Expression is difficult, owing to the movements being often extremely slight, and of a fleeting nature. A difference may be clearly perceived, and yet it may be impossible, at least I have found it so, to state in what the difference consists. When we witness any deep emotion, our sympathy is so strongly excited, that close observation is forgotten or rendered almost impossible; of which fact I have had many curious proofs. Our imagination is another and still more serious source of error; for if from the nature of the circumstances we expect to see any expression, we readily imagine its presence. Notwithstanding Dr. Duchenne's great experience, he for a long time fancied, as he states, that several muscles contracted under certain emotions, whereas he ultimately convinced himself that the movement was confined to a single muscle.

In order to acquire as good a foundation as possible, and to ascertain, independently of common opinion, how far particular movements of the features and gestures are really expressive of certain states of the mind, I have found the following means the most serviceable. In the first place, to observe infants;
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