thought derailment

disconnected thought processes, as manifested by a tendency to shift from one topic to another that is indirectly related or completely unrelated to the first. Thought derailment is a symptom of schizophrenia; the term is essentially equivalent to cognitive derailment.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

November 18th 2024

center–surround antagonism

a characteristic of the receptive fields of many visual and somatosensory neurons in which stimulation in the center of the receptive field evokes opposite responses to stimulation in the periphery. Thus, some neurons depolarize with center stimulation and hyperpolarize when the same stimulus appears in the surrounding region of the receptive field, whereas other neurons have the opposite pattern of responses. Center–surround antagonism greatly increases the sensitivity of the nervous system to contrast. See also off response; on response; simple cell.