Mimicry or imitation of the movements of another person
Mimicry or imitation of the speech of another person
Excessive maintenance of posture; for example, after the arms or legs are placed in a certain position, the individual holds that same position for hours
Tremors at rest, muscle rigidity, bradykinesia
Regular rhythmic movements, usually of the lower limbs; constant pacing may also be seen; often noticed in people taking antipsychotic medication
Absence or diminution of voluntary motion. It is usually accompanied by a parallel reduction in mental activity
Involuntary muscular activity, such as a tic, spasm, or myoclonus
A disturbance in associative thinking in which the speaker goes off the topic. When it happens frequently and the speaker does not return to the topic, interpersonal communication is destroyed
A word a person makes up that has meaning only for that person; often part of a delusional system
Looseness of association
A pattern of thinking that is haphazard, illogical, and confused, and in which connections in thought are interrupted; it is seen primarily in schizophrenic disorders
A continuous flow of speech in which the person jumps rapidly from one topic to another
-- Sometimes the listener can keep up with the changes; at other times it is necessary to listen for themes in the incessant talking. Themes often include grandiose and fantasized evaluation of personal sexual prowess, business ability, artistic talents, and so forth.
A sudden obstruction or interruption in the spontaneous flow of thinking or speaking tat is perceived as an absence of deprivation of thought.
Circumstantiality (also called circumstantial speech)
A pattern of speech characterized by indirectness and delay before the person gets caught up in countless details and explanations
The involuntary repetition of the same thought, phrase, or motor response (brushing teeth, walking); it is associated with brain damage.
The filling in of a memory gap with a detailed fantasy believed by the teller. The purpose is to maintain self-esteem. It is seen in organic conditions such as Korsakoff’s psychosis
A mixture of words meaningless to the listener and to the speaker as well.
The meaningless rhyming of words, often in a forceful manner
A phenomenon whereby a person experiences a sense of unreality or of estrangement from the self. For example, one may feel that one’s extremities have changed, that one is seeing oneself from a distance, or that one is in a dream.
The false perception by a person that his or her environment has changed. For example, everything seems bigger or smaller, or familiar objects appear strange and unfamiliar.
Idea of reference
The false impression that outside events have special meaning for oneself
The belief that thinking something can make it happen; it is seen in children and psychotic patients.
A state characterized by the presence of intense and strongly defended irrational suspicions. These ideas cannot be corrected by experience and cannot be modified by facts or reality.
A sense perception (seeking, hearing, tasting, smelling, or touching) for which no external stimulus exists (hearing voices when none are present)
A false belief held to be true even when evidence to the contrary (the false belief that one is being singled out for harm by others)
Exaggerated belief in or claims about one’s importance or identity
An idea, impulse, or emotion that a person cannot put out of his or her consciousness; the condition can be mild or severe
Repetitive action that a person must execute over and over until he or she is exhausted or anxiety is decreased; it is often performed to lessen the anxiety triggered by an obsession.
An intense irrational fear of an object, situation, or place. The fear persists even though the object of the fear is harmless and the erpson is aware of the irrationality.
Lack of energy; passivity
The inability to experience pleasure.
A normal mood state
Nocturnal and/or daytime involuntary discharge of urine
Involuntary defecation not attributable to physical defects or illness