Nervous and mental diseases . Fig. 263.—Zoopsia (Richer).. Fig. 264.—Delirium of the fourth period (Richer). second phase, which are repeated with more or less rapidity. One ofthe most common and characteristic contortions is an exaggerated opis-thotonos, or arc de cercle. This may also be executed forward or later-ally. To these contortions succeed alternate flexions and extensions ofthe trunk or of the limbs, or rotations of the head. This phase isattended usually by violent outcries, and, in evident fear or rage, thepatients tear their garments, grimace in a horrible manner, and putforth an


Nervous and mental diseases . Fig. 263.—Zoopsia (Richer).. Fig. 264.—Delirium of the fourth period (Richer). second phase, which are repeated with more or less rapidity. One ofthe most common and characteristic contortions is an exaggerated opis-thotonos, or arc de cercle. This may also be executed forward or later-ally. To these contortions succeed alternate flexions and extensions ofthe trunk or of the limbs, or rotations of the head. This phase isattended usually by violent outcries, and, in evident fear or rage, thepatients tear their garments, grimace in a horrible manner, and putforth an astounding amount of strength against those trying to control HYSTERIA. 601 them. In this phase they often bite, scratch, and strike at their at-tendants, apparently under the domination of the hallucinations of afixed dream or delusional storm. 4. Period of Passional Attitudes.—The third period is the gradualoutgrowth and logical continuation of the second. The patient drama-tizes in pantomime the acts of the dream that embraces circumstances ofthe


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