Chap. VII. DEPRESSED CORNERS OF THE MOUTH. 191 



followed by bitter weeping. In all cases of distress, 

 whether great or small, our brains tend through long 

 habit to send an order to certain muscles to contract, 

 as if we were still infants on the point of screaming out; 

 but this order we, by the wondrous power of the will, 

 and through habit, are able partially to counteract; al- 

 though this is effected unconsciously, as far as the means 

 of counteraction are concerned. 



On the depression of the comers of the mouth. — This 

 action is effected by the depressores anguili oris (see let- 

 ter K in figs. 1 and 2). The fibres of this muscle diverge 

 downwards, with the upper convergent ends attached 

 round the angles of the mouth, and to the lower lip 

 a little way within the angles. 6 Some of the fibres ap- 

 pear to be antagonistic to the great zygomatic muscle, 

 and others to the several muscles running to the outer 

 part of the upper lip. The contraction of this muscle 

 draws downwards and outwards the corners of the 

 mouth, including the outer part of the upper lip, and 

 even in a slight degree the wings of the nostrils. When 

 the mouth is closed and this muscle acts, the commis- 

 sure or line of junction of the two lips forms a curved 

 line with the concavity downwards, 7 and the lips them- 

 selves are generally somewhat protruded, especially the 

 lower one. The mouth in this state is well represented 

 in the two photographs (Plate II., figs. 6 and 7) by Mr. 

 Eejlander. The upper boy (fig. 6) had just stopped cry- 

 ing, after receiving a slap on the face from another boy; 

 and the right moment was seized for photographing him. 



6 Henle, Handbuch der Anat. des Menschen, 1858, B. 

 i. s. 148, fig-s. 68 and 69. 



7 See the account of the action of this muscle by Dr. 

 Duchenne, ' Mecanisme de la Physionomie Humaine, 

 Album (1862), viii. p. 34. 



