Glossary O

Obsessive reminiscence refers to a kind of reminiscence that suggests an inability to resolve or accept certain past events and a persistent guilt or despair over these events.

Obsessive-compulsive disorder (OCD) refers to Anxiety disorder involving unwanted, persistent, intrusive thoughts and impulses, as well as repetitive actions intended to suppress them.

Obsessive-compulsive personality disorder refers to Cluster C (anxious or fearful) personality disorder featuring a pervasive pattern of preoccupation with orderliness, perfectionism, and mental and interpersonal control at the expense of flexibility , openness, and efficiency.

Obstructive hydrocephalus refers to a form of hydrocephalus produced by obstruction within the ventricular system of the brain. The obstruction can be a consequence of congenital malformation, tumors, or scarring. Obstructive hydrocephalus is also referred to as Noncommunicating hydrocephalus.

Obstructive sleep Apnea refers to Apnea that occurs most often during rapid eye movement (REM) sleep when either the upper airway collapses, not allowing air to pass, or the body weight of the patient on the chest compromises respiratory effort.

Occam's razor refers to the belief that of several, equally effective alternative explanations, the one that makes the fewest assumptions should be accepted.

Occasion setting refers to a procedure in which a stimulus, known as an Occasion setter signals that a CS (conditoned stimulus) is likely to be followed by the US (unconditioned stimulus) with which it is associated.

Occasionalism refers to the belief that bodily events and mental events are coordinated by God's intervention .It is the belief that the relationship between the mind and body is mediated by God.

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