To add to her misfortunes, her head has now begun to rotate to the right. She used four times a day to cross the narrow and little frequented road that separated her father's house from her place of employment; but since her last accident she has remained strictly within doors, trifling away the time in a chair, and finding in the petty life of a side-street all that she wants to attract her gaze or arouse her interest. In this microcosm her father has been reduced to the position of a slave. He anticipates her slightest want and indulges her most fanciful whim; his commiseration for her woes is only equalled by his unselfishness in foregoing his own pleasure and his ingenuity in vindicating her weaknesses. In short, his ready acceptance of his daughter's instability argues a lack of mental balance on his own part. Brain fatigue is another element in the formation of tics whose influence ought not to be underestimated. In the case of young D., nineteen years old, a clucking tic supervened during the period of preparation for an examination, to disappear at its close. No less fruitful are anguish, anxiety, worry, disappointment, as will freely be conceded. Any prolonged concentration of the attention on a particular act or a particular idea presupposes a concomitant weakening of inhibitory power over other acts and ideas, which then become corrupt and inopportune, are incapable of further repression, and blossom into tics. Indolence, too--the mother of all the vices, according to the adage--favours the outbreak of tics, and accelerates their growth. The idle patient's thoughts are all for his tic; its perfecting taxes his inventiveness. Mention may be made in passing of the effect of "professional movements" in predisposing to the subsequent apparition of a tic in the muscles concerned. We have already alluded to the relation between tics and certain cramps or occupation neuroses, and we shall refer to the topic again at a later stage. It would appear that even the memory of a familiar gesture sometimes suffices to initiate the condition: witness Grasset's case of post-professional colporteur tic, where the subject reproduced the movement of swinging a bag over his shoulder, a souvenir of his former avocation.[37] A final example, none the less instructive though it occur in lay literature, may be cited from Alfred de Vigny[38]: