“Even perfectly normal children are sometimes inclined in their growing period to display great variations of temper, and to be violent and changeable in their affections about the age of puberty. This, however, is far more noticeable in the case of people of a strongly developed nervous temperament. Groundless outbreaks of anger, marked pathological absence of mind and entire inability to concentrate their thoughts are often the result. Fits of oppression and anxiety are not unknown; headaches are fairly frequent and the patients seem at times not to be masters of themselves. They also tend to swing from an exaggerated idea of their own importance to a despondent lack of self-confidence. In their bents and friendships they are very fickle.” Hence we have here already in a very marked degree that instability which von Magnan has pointed out as characteristic of degenerates. In later life, too, such highly strung temperaments are often, at least in the worse cases, predisposed to sudden changes of views, and to fly to extremes, their varying moods tend at times to become periodic, they are over-sensitive, are frequently unable to bear alcohol, their sexual inclinations are abnormal and they are often addicted from an early age to masturbation.… Thus the predominant characteristic of the degenerate is lack of constancy (p. 175). Of “nervosity” where it is combined with fear the same author says: “The change of mood is often entirely without cause and is by no means of a regular type, though instances of a periodic character are occasionally to be met with.… We meet, for example, persons whom we cannot possibly describe as ill, who at times are exceptionally capable, lively and good-tempered, and yet at other times give the impression of being downhearted, self-centred and scarcely able to get through their daily tasks.” “Apart from those who are habitually depressed, there are others who suffer from time to time, without any outward cause, from slight fits of depression, mostly accompanied by more or less severe fits of anxiety. Looking more carefully into these various types, we shall find that they belong almost exclusively to strongly marked nervous temperaments.… In bad cases the periodic changes of mood may become stronger and stronger, and lead eventually between the fortieth and sixtieth year to actual ‘_folie circulaire_.’ Anxiety is, of course, common to all nervous people, but in many cases it plays the prominent part.… Often the patients complain of all kinds of accompanying symptoms, not seldom of palpitations, weakness in the legs, headaches, attacks of dizziness, and, particularly, of the paralysing effects of their vague dreads. When this anxiety overtakes them they become unable to work as usual, and their spirit of enterprise is checked” (p. 207 ff.).