Insanity is a manifestation of disease of the brain, characterized by a general or partial derangement of oue or more faculties of the mind, and in which, while consciousness is not abolished, mental freedom is perverted, weakened, or destroyed. Hammond, Nervous System, 332. The prolonged departure, without any adequate cause, from the states of feeling and modes of thinking usual to the individual in health. Bouvier. By insanity is not meant (in law) a total deprivation of reason, but only an inability, from defect of perception, memory, and judgment, to do the act in question, [with an intelligent apprehension of its nature and consequences.] So, by a lucid interval is not meant a perfect restoration to reason. but a restoration so far as to be able, beyond doubt, to comprehend and to do the act with such reason, memory, and judgment as to make it a legal act. Frazer v. Frazer, 2 Del. Ch. 203.
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