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A related term is tangentiality—it refers to off-the-point, oblique or irrelevant answers given to questions. [2] In some studies on creativity, knight's move thinking—while describing a similarly loose association of ideas—is not considered a mental disorder or the hallmark of one; it is sometimes used as a synonym for lateral thinking.
An example of tangential migration is the movement of interneurons from the ganglionic eminence to the cerebral cortex. One example of ongoing tangential migration in a mature organism, observed in some animals, is the rostral migratory stream connecting subventricular zone and olfactory bulb.
Some adults with right hemisphere brain damage may exhibit behavior that includes tangential speech. [4] Those who exhibit these behaviors may also have related symptoms such as seemingly inappropriate or self-centered social responses, and a deterioration in pragmatic abilities (including appropriate eye contact as well as topic maintenance). [5]
The following outline is provided as an overview of and topical guide to thought (thinking): Thought is the object of a mental process called thinking, in which beings form psychological associations and models of the world. Thinking is manipulating information, as when we form concepts, engage in problem solving, reason and make decisions ...
Characteristics of disorganized speech include rapidly switching topics, called derailment or loose association; switching to topics that are unrelated, called tangential thinking; incomprehensible speech, called word salad or incoherence. Disorganized motor behavior includes repetitive, odd, or sometimes purposeless movement.
A person with circumstantiality has slowed thinking and invariably talks at length about irrelevant and trivial details (i.e., circumstances). Eliciting information from such a person can be difficult since circumstantiality makes it hard for the individual to stay on topic. In most instances however, the relevant details are eventually achieved.
Other examples include the Beck Hopelessness Scale [14] for measuring thoughts about the future and the Rosenberg Self-Esteem Scale [15] for measuring views of the self. The Cognitive Triad Inventory (CTI) was developed by Beckham et al. [ 13 ] to attempt to systematically measure the three aspects of Beck's triad.
An example of this mode of migration is in GnRH-expressing neurons, which make a long journey from their birthplace in the nose, through the forebrain, and into the hypothalamus. [19] Many of the mechanisms of this migration have been worked out, starting with the extracellular guidance cues [ 20 ] that trigger intracellular signaling.