LOCKE, JOHN (1632-1704)

Locke, the great empiricist and pioneer in associationist psychology, was born in Somerset, England, studied medicine and science at Oxford, and later became adviser...

LOGORRHEA (Logomania,Hyperlogia,Hyperphrasia)

Excessive, uncontrollable talking, often highly incoherent.Logorrhea occurs in states of pathological excitement, particularly in the manic phase of manic-depressive psychosis where one of the...

LOVE

A complex yet basically unified emotion comprising tenderness, affection, and devotion to the well-being of another person or persons.In more specific terms, love involves...

LUPUS ERYTHEMATOSUS Giterally, wolf-red inflammation)

A collagen, or connective tissue, disease of unknown cause affecting small blood vessels in various organs of the body, including the brain; classified by...

LYING

Lying may take either a normal or pathological form, and will therefore be discussed as (a) a feature of the moral development of the...

LEAD POISONING

Lead poisoning is the most frequent type of metallic intoxication, and usually produces the most severe mental symptoms. It is classified by the American...

LYSERGIC ACID (LSD)

A powerful hallucinogenic, “mind-expanding” drug used for experimental and therapeutic purposes.In its natural form, lysergic acid diethylamide, LSD-25, is a derivative of ergot, a...

LANGUAGE (Psycholinguistics)

Language may be defined as a system of symbols with commonly recognized meanings which facilitates our thought processes and enables us to communicate with...

LASHLEY, KARL SPENCER (1890- 1958)

This outstanding physiological psychologist was born in West Virginia and received his Ph.D. in genetics at Johns Hopkins in 1915. He remained there for...

LATERAL DOMINANCE (Laterality)

Predominance of one side of the body over the other, resulting in the preferred use and superior functioning of either the left or the...

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