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Results for “MENTAL PROCESSES”

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PubMed1960

Aprosexia.

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Humans↗
PubMed1963

Boredom.

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Boredom↗
PubMedDate not supplied

Effects of prenatal alcohol exposure at school age. I. Physical and cognitive development.

Alcohol is a potent teratogen associated with dysmorphology, growth retardation, and neurological damage in children with the full fetal alcohol syndrome (FAS); alcohol is also associated with growth retardation and behavioral alterations in neonates prenatally exposed to various dosages. Questions remain about the long-term consequences of prenatal alcohol exposure. This study reports on the follow-up of a subsample of 68 children, the majority of whom were low income and black (mean age: 5 years, 10 months) who were first evaluated as neonates. Physical and cognitive outcomes of 25 children of women who drank throughout pregnancy [absolute alcohol (AA)/week: mean = 11.80 oz), even after receiving an educational intervention to stop drinking, were compared with outcomes of children in two contrast groups: a) women (n = 22) who stopped drinking (AA/week: mean = 11.46 oz) in the second trimester after an educational intervention but resumed postpartum; and b) women who did not drink during pregnancy and who drank little postnatally (n = 21). Children were compared for alcohol-related birth defects (ARBDs), growth (height, weight, and head circumference), and cognitive, academic, and adaptive measures. Neonatal and current physical measures were correlated to determine predictability of neonatal status. When the effects of age and gender were controlled, children in the continued-to-drink group showed significantly more ARBDs and had smaller head circumferences than those in the other two groups. When current drinking reported by caretakers was controlled, the children who were exposed throughout pregnancy also showed significant and consistent deficits in several areas of intellectual functioning including sequential processing (short-term memory and encoding) and overall mental processing. Alcohol-exposed children displayed significant deficits in preacademic skills when compared with children of nondrinkers, with both alcohol groups deficient in premath and reading skills. There were no differences in adaptive behavior at follow-up. These data suggest that alcohol exposure throughout pregnancy is correlated with persistent physical differences as well as identifiable deficits in sequential memory processes and specific academic skills. However, even when alcohol use is limited to the first part of pregnancy, significant deficits in academic skills and growth parameters are measurable.

Adult↗
PubMedDate not supplied

Neural basis of spontaneous thought processes.

Studies examining thought processes have focused upon the deliberate, goal-directed mental processes occurring during complex cognitive tasks. Spontaneously occurring thought processes have, on the other hand, received much less attention. Such spontaneous thought processes occur frequently when no task is present or when task demands are low. Although their existence has been recognised, their study has been difficult due to lack of direct behavioural measures. Nevertheless, a number of behavioural methods based on subjects' verbal reports have been developed. Findings derived using such behavioural methods suggest that spontaneous thought processes share common cognitive mechanisms with purposeful, task-related thought processes. Furthermore, evidence from neuroimaging observations is accumulating suggesting similar conclusions about the neural basis of spontaneous thought processes. These neuroimaging findings demonstrate an overlap in the pattern of activation between various cognitive tasks and rest, with a number of higher cortical regions activated in common, including visual areas, medial temporal lobe, and lateral cortical association areas. Many of these observations have, however, been based upon comparisons between rest and tasks posing relatively high cognitive demands. In contrast, here we report an fMRI study in which rest was compared to a simple left/right response task of minimal cognitive demands. Rest was associated with greater activation in temporopolar cortex, parahippocampus, rostrolateral prefrontal cortex, parietal and visual cortical areas. Activation of temporal lobe structures was particularly extensive and robust, suggesting that long-term memory processes may form the core of spontaneous thought. By considering such long-term memory processes as an essential part of thought mechanisms, it may be possible to gain better understanding into spontaneous thought phenomena that have remained unaccounted for until now.

Adolescent↗
PubMed1997

Orienting attention without awareness.

Previous research has shown that visual attention can be directed to a spatial location in 2 qualitatively different ways. Attention can be allocated endogenously in response to centrally presented precues, or it can be captured exogenously by a visual stimulus with an abrupt onset. It has been suggested that exogenous orienting of attention is an automatic process, whereas endogenous orienting of attention represents a controlled and strategic process. M.I. Posner and C.R.R. Snyder (1975) suggested that an automatic process occurs without intention, does not interfere with other mental processes, and does not necessarily give rise to awareness, whereas a controlled process will likely interfere with other processes and necessarily requires intention and awareness. Three experiments investigated the role of awareness in orienting visual attention. Endogenous and exogenous components of orienting attention were placed in opposition to each other to assess the automaticity of exogenous orienting by examining the potential for brief stimulus events to capture attention in the absence of subjective awareness. Results show that an exogenous cue presented below a subjective threshold of awareness captured attention automatically and without awareness.

Attention↗
PubMed2003

The development of an attachment-based treatment program for borderline personality disorder.

The treatment of borderline personality disorder (BPD) remains controversial. The authors have developed an evidence-based treatment program rooted in attachment theory that integrates research on constitutional factors with environmental influences. BPD is conceived of as a disorder in the self-structure brought about through environmentally induced distortion of psychological functioning, which decouples key mental processes necessary for interpersonal and social function. The primary mental function involved is mentalization, which is enfeebled by an absence of contingent and marked mirroring during development. Treatment strategies target mentalization in order to foster the development of stable internal representations, to aid the formation of a coherent sense of self, and to enable to borderline patient to form more secure relationships in which motivations of self and other are better understood. Destabilization of the self leads to emotional volatility, so treatment also needs to focus on identification and appropriate expression of affect. This article describes some of the techniques used to enhance mentalization within the context of group and individual psychotherapy. Targeting of current symptomatology and behavior is insufficient. Therapists need to retain their own ability to mentalize, maintain mental closeness, focus on current mental states, and avoid excessive use of conflict interpretation and metaphor while paying careful attention to the use of transference and countertransference.

Affect↗
PubMed2000

Local muscular fatigue and attentional processes in a fencing task.

Study of the effects of brief exercise on mental processes by Tomporowski and Ellis (1986) has shown that moderate muscular tension improves cognitive performance while low or high tension does not. Improvements in performance induced by exercise are commonly associated with increase in arousal, while impairments are generally attributed to the effects of muscular or central fatigue. To test two hypotheses, that (1) submaximal muscular exercise would decrease premotor time and increase would increase the attentional and preparatory effects observed in premotor time 9 men, aged 20 to 30 years, performed an isometric test at 50% of their maximum voluntary contraction between blocks of a 3-choice reaction-time fencing task. Analysis showed (1) physical exercise did not improve postexercise premotor time, (2) muscular fatigue induced by isometric contractions did not increase motor time, (3) there was no effect of exercise on attentional and preparatory processes involved in the postexercise choice-RT task. The invalidation of hypotheses was mainly explained by disparity in directional effects across subjects and by use of an exercise that was not really fatiguing.

Adult↗
PubMed1997

Flexibility in the structure of human information processing.

The studies reported in this chapter argue for a flexible organization of higher mental processes, including perceptual and attentional systems in the visual modality and attentional systems related to action. There is electrophysiologic evidence that the visual perceptual system has a modularized structure, and that selection of perceived features is adjustable to sensory, conceptual, and utility constraints, both with respect to the hierarchy of selection cues and the transmission of information between perception and action. A distributed neural network subserves these functions and may therefore provide a source for plasticity and reorganization after brain damage by flexibility in the allocation of resources to various stages of stimulus analysis.

Cognition↗
PubMed1993

Information and psychopathology.

Our current understanding of mental processes in health and disease is limited by the absence of a practical model describing the physiology of the mind as an informational system. The mind is described here as a physical system with four functional dimensions that can be interrelated mathematically on the basis of information theory. These variables describe the information processing activities of the mind, and include: a) a state function (g), which is the number of potential states that the system can occupy at a given time and relates to the complexity and activity of the brain; b) a power function (P), the number of state changes per unit time; c) time (t); and d) the relative entropy of the system (R), which describes the ordering of mental states in time. Using these variables, the evolution of states of mind can be described as a trajectory in a multidimensional phase space representing all possible mental states. Ego functions constrain the field of brain states within this space, thereby giving rise to the information content of consciousness and to the individual psyche. Functional mental disorders, as disorders of the psyche, are dysfunctions in the ordering processes that give rise to conscious information.

Brain↗
PubMed1990

Isotopic diversity as an unexplored mind-matter dimension.

The existence of several stable isotopes for most chemical elements is a well known and widely used fact of chemistry. Nevertheless, despite all the attention given to the stable and radioactive isotopes of individual elements, there have been very few, if any, attempts to look at isotopicity as a single phenomenon in its own right. Some possible links between isotopicity and various structural and functional levels of organization of the material and informational realm are put forward in this article, which presents isotopicity as an independent and informationally active level of spontaneous pattern formation and self-organization, giving a flexible link between morphogenetic potentialia and the microscopic operational level of physico-chemical processing. A dynamical parallel is drawn between Anderson localization induced by an isotopic disorder and holographic mental processing interpretable as self-focusing of mental patterns and spontaneous creativity.

Biology↗
PubMed1985

[The P300 component of the event-related brain potential as an indicator in the study of information processing].

Event-related bioelectrical brain activity plays an important role in psychophysiological investigations of mental processes. One of the so-called endogenous components of ERP, the P300, occurring in the time range from 300 ms to 800 ms after stimulus presentation accompanies the selective call on cognitive processing of stimulus information. An overview of some influencing factors and of hypotheses according functional significance of P300 is given. Although functional significance of P300 is only partly known there are interesting possibilities of application, e.g. in Neurology, Psychiatry and Occupational medicine.

Arousal↗