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Disconnection syndrome
Disconnection syndrome Term coined by Norman Geschwind to describe the interruption of information transferred from one brain region to another.
RELATED TERMS--------------------------------------
Brain
"That part of the central nervous system that is located within the cranium (skull). The brain functions as the primary receiver, organizer and distributor of information for the body. It has two (right and left) halves called ""hemispheres."" "
SIMILAR TERMS--------------------------------------
Disc
Shortened terminology for an intervertebral disc, a disk-shaped piece of specialized tissue that separates the bones of the spinal column.
Disc prolapse
Condition in which an intervertebral disc is damaged and some of it protrudes. May cause sciatica if it does so in the vicinity of a major nerve in the spine.
Disc, cervical
A disk shaped piece of specialized tissue that separates the vertebral bones of the spinal column in the neck.
Disc, optic
The circular area in the back of the inside of the eye where the optic nerve connects to the retina. Also called the optic nerve head.
Disc, slipped
Rupturing of the tissue that separates the vertebral bones of the spinal column.
Discase
Discase is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): chymopapain.
Discharge
1.The flow of fluid from part of the body, such as from the nose or vagina. 2. The passing of an action potential, such as through a nerve or muscle fiber. 3. The release of a patient from a course of care. The doctor may then dictate a discharge summary.
Discipline
The limits a parent or caregiver sets on a child's behavior for purposes of safety or socialization.
Discoid lupus erythematosus
A round, red, scaling rash on the nose, forehead, cheeks, scalp or other areas of the body. It may be associated with systemic lupus erythematosus.
Discordance
1. The presence of any given condition such as HIV in only one member of a couple. 2. In genetics, the presence of a phenotype such as asthma in only one members of a twin pair. 3. In clinical care, lack of agreement between physician and patient.In all sense, disconcordance is as opposed to concordance.
Discordant
1. Showing discordance, lack of agreement. A couple may be discordant for a sexually transmitted infection, with one partner having it and the other not. 2. In transplantation genetics, between different species. A discordant xenograft is a transplant between members of very different species
Discordant couple
A pair of long-term sexual partners in which one has a sexually transmitted infection and the other does not. The CDC has guidelines for counseling discordant couples in which the woman is HIV-infected and her husband is HIV-uninfected.
Discounting the illuminant
Illumination of the visual world tens to be non-uniform, and fluctuates. in order for the visual system to create a consistent perception of color and lightness it must somehow discount fluctuation and gradient in the lighting source.
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Depersonalization
An alteration in the perception or experience of the self so that one feels detached from, and as if one is an outside observer of, one's mental processes or body (e.g., feeling like one is in a dream).
Derailment
Loosening of associations. A pattern of speech in which a person's ideas slip off one track onto another that is completely unrelated or only obliquely related. In moving from one sentence or clause to another, the person shifts the topic idiosyncratically from one frame of reference to another and things may be said in juxtaposition that lack a meaningful relationship. This disturbance occurs between clauses, in contrast to incoherence, in which the disturbance is within clauses. An occasional change of topic without warning or obvious connection does not constitute derailment.
Derealization
An alteration in the perception or experience of the external world so that it seems strange or unreal (e.g., people may seem unfamiliar or mechanical).
Dereistic
Mental activity that is not in accordance with reality, logic, or experience.
Detachment
A behavior pattern characterized by general aloofness in interpersonal contact; may include intellectualization, denial, and superficiality.
Disconnection syndrome
Disinhibition
Freedom to act according to one's inner drives or feelings, with less regard for restraints imposed by cultural norms or one's superego; removal of an inhibitory, constraining, or limiting influence, as in the escape from higher cortical control in neurologic injury, or in uncontrolled firing of impulses, as when a drug interferes with the usual limiting or inhibiting action of GABA within the central nervous system.
Disorientation
Confusion about the time of day, date, or season (time), where one is (place), or who one is (person).
Dysphoric mood
An unpleasant mood, such as sadness, anxiety, or irritability.
Displacement
A defense mechanism, operating unconsciously, in which emotions, ideas, or wishes are transferred from their original object to a more acceptable substitute; often used to allay anxiety.
Dissociation
disruption in the usually integrated functions of consciousness, memory, identity, or perception of the environment. The disturbance may be sudden or gradual, transient or chronic.
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