Category: P

Perceptual distortion in which an image persists after removal of the stimulus. Abnormal experience of recurrent visual hallucinations. Persistence of a visual image after the object has been removed. It may be associated with a lesion in the occipital lobe of the brain.  

A neurological condition characterized by the repetition of a phrase or word with increasing rapidity. It can be a symptom of tourette’s disorder, asperger’s disorder, or autistic disorder. A speech disorder in which the person repeats words. A rare condition in which a person repeats a phrase over and over with increasing rapidity; it often…

Refers to ejaculation following minimal sexual stimulation before, at the point of, or shortly after entry and before the man wishes it. Undesired ejaculation occurring immediately before or very early in sexual intercourse. The rapidity of ejaculation may prevent the woman from achieving sexual satisfaction or reaching orgasm. The inability of the male to delay…

Recent use of PCP or a related substance may induce belligerence, assaultiveness, impulsiveness, unpredictability, and impaired judgment. The physical signs may include hypertension or a very rapid heartbeat, numbness or diminished responsiveness to pain, ataxia, muscle rigidity, or seizures. An nmda receptor antagonist developed in the 1950s as an intravenous anesthetic. PCP is capable of…

Characterized by failure to use developmentally expected speech sounds that are appropriate for age and dialect. Speech sounds may be omitted, substituted, or distorted, as in saying “w” for “r” or “f” for “th.” Formerly called developmental articulation disorder, this illness is characterized by a failure to articulate appropriate speech sounds for a person’s age…

Characteristic symptoms include inappropriately leaving one’s seat in the classroom or running about, fidgeting or squirming, difficulty engaging in leisure activities quietly, difficulty awaiting one’s turn in games, and blurting out answers to questions before they are completed.  

Characteristic symptoms include distractibility, difficulty in sustaining attention or following through on instructions in the absence of close supervision. Other symptoms include avoidance of tasks that require sustained mental effort, failure to pay close attention to details in schoolwork or other activities, difficulty in organizing activities, not listening to what is being said to him…

The death of cells, which occurs as a controlled part of a biological process.  

The part of the brain that determines what you pay attention to and how you respond to it.