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Results for “Perceptual Disorders”

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At least 379 records · Page 21Linked to original sources
PubMed1997

Psychopathology in dementia.

The purpose of this overview is to describe the psychological and behavioral symptoms of dementia reported in the professional literature in recent years. This subject, a relatively neglected one, is considered in order to focus attention on a number of the symptoms most troublesome to the demented person's surroundings which lead to his/her hospitalization, with all the implications this has on the patients, their families and the community's health budget. To carry out an early and effective intervention, professionals need to define and recognize these symptoms and gain experience in treating them, either by intervention in the environment or by medication. This survey attempts to examine the state of the art in this field, while analyzing the difficulties that emerge in studying it.

Alzheimer Disease↗
PubMed1976

[Psychiatry of minimal, early-childhood brain damage].

Early psychoorganic syndrome in the child is the result of a diffuse cerebral lesion which usually occurs in pregnancy, during delivery or immediately post partum. In the majority of cases the symptoms are biological, normally of a neurologic character, and serve to underpin the diagnosis. They mainly comprise psychomotor disturbances, linguistic disorders and malregulation of central nervous functions. From the psychic viewpoint both intellectual and emotional disturbances are observable. Intellectually the disorders are chiefly of attention, perception and concentration, and in most cases lead to seriously impaired school performance. They are accompanied by an ideation which is frequently retarded and exhibits a tendency to perseveration. The psychoorganic child's affectivity is marked by pathologic lability, increased irritability and imperfect control of impulse and emotion. Secondary infantilism is nearly always observable. In very many cases reactive, and notably neurotic, disorders are superimposed on the psychoorganic substratum. There are thus a wide variety of clinical pictures. A broad spectrum of therapeutic resources is available, covering education, drugs and psychotherapy of superimposed reactive disorders.

Affective Symptoms↗
PubMed2000

Nonlinguistic perceptual deficits associated with reading and language disorders.

Recent behavioral evidence supports the idea that some individuals with reading and language disorders are impaired in their perception of nonlinguistic auditory and visual information. More sophisticated measurement paradigms and analysis techniques are leading to a clearer understanding of these deficits and to possibilities for their remediation.

Auditory Perception↗
PubMed1978

The relationship between perceptual dysfunction and language disorders: a case report.

The acquisition of language is discussed in relation to two specific perceptual processes: first, identification and discrimination of recurring aspects of an experience, and second, integration of the language form with the specific aspect of the event being represented. The analysis of the language of a child with perceptual and integrative deficits revealed expressive use of language without comprehension and limited knowledge of concepts. Explanations of these behaviors are presented in light of the child's perceptual and integrative dysfunctions. Implications for clinical management of a perceptually based language disorder are discussed.

Child↗
PubMed1983

Patterns of auditory processing and articulation deficits in academically deficient juvenile delinquents.

Auditory processing deficits and articulation disorders were studied in a group of male juvenile delinquents. Significant auditory processing deficits were frequently observed and were significantly related to underachievement in reading, spelling, and arithmetic. In addition, articulation disorders were present in over 60% of the delinquent subjects. The results are interpreted to indicate that the evaluation of speech capabilities and auditory processing skills should be an integral part of treatment programs for delinquent populations. The importance of early intervention through identification and treatment of speech and language disorders in the early school period is supported.

Achievement↗
PubMed1986

Pure-tone pitch anomalies. II. Pitch-intensity effects and diplacusis in impaired ears.

Pitch-intensity functions and psychophysical tuning curves (PTC's) were measured in ten listeners with sensorineural impairments of presumed cochlear origin. Masking patterns, frequency jnd's, diplacusis measurements, and octave adjustments were also obtained for selected conditions in selected listeners. The results showed a tendency for increased frequency jnd's and increased pitch-matching variability in frequency regions where frequency resolution, as determined by PTC Q10 estimates, was degraded. The results also showed exaggerated pitch-level effects, both in regions where frequency resolution was degraded and, in many cases, in regions where thresholds and frequency resolution were apparently normal. The usual manifestation of exaggerated pitch-level effect was an abnormally large negative pitch shift with increasing level, particularly at low frequencies. The limited data from diplacusis measurements and octave adjustments suggest that the exaggerated negative pitch shifts are the consequence of a large increase in pitch at low stimulus levels which "recruits" at higher levels. These results are difficult to explain with simple tonotopic models, or presently formulated temporal models, of pure-tone pitch encoding.

Acoustic Stimulation↗
PubMed1986

The nature of the abnormal perceptual experiences at the onset of schizophrenia.

Sixty schizophrenics and 40 depressives in remission from the floridly psychotic phase were given a semi-structured interview concerning their abnormal perceptual experiences at the onset of their illness. About 50% of each set of subjects had experienced an alteration in the quality of their perception. However, there was a fairly characteristic pattern in each case: emotional tainting of the world around, a sense of unreality and noise sensitivity in depression; and an indefinable, qualitative change in visual perception, particularly affecting the way colours, people, space and facial expression were viewed, in schizophrenia. Of the various theories which have been put forward to explain perceptual change in schizophrenia, a breakdown in gestalt appeared to explain these findings best.

Auditory Perceptual Disorders↗
PubMed1980

Auditory misperceptions of word-association stimuli in schizophrenia.

This study examined whether auditory misperception of stimulus words on a word-association test can account for idiosyncratic responses of 37 schizophrenics. Results indicated performance comparable to 19 nonschizophrenics' under conditions of auditory and visual presentation, and thus did not support the position that mishearing of stimuli artifactually increased associative thought disturbance.

Auditory Perceptual Disorders↗
PubMed1981

Some systematic observations on monaural diplacusis.

Anomalies of monaural pitch perception, including pitch changes with level, roughness and beats, were mapped in the intensity-frequency plane by a listener using continuous-tone stimulation between approximately 1 900 and 2 750 Hz. A narrow region characterized by rapid threshold adaptation was also mapped between approximately 2 590 and 2 690 Hz. In the procedure used to localize the internally generated tones, which were interacting with the externally presented single tones to produce beats, the listener adjusted the frequency of a signal presented to this right ear so that the beat rate heard there was the same as a criterion beat rate produced by two external tones in his left ear. A plot in the intensity-frequency plane of adjustments for a constant-beat rate revealed a remarkable correspondence to the region of adaptation (between 2 590 and 2 690 Hz) in that the former curve was simply shifted in frequency away from the latter by an amount equal to the two-tone interval producing the beat rate. Thus, the locations of 'internal tones' correspond predictably to both the lower and upper-frequency boundaries of the region of adaptation. Pitch changes, as a function of signal level, at frequencies below the region of adaptation were also investigated and appear to reflect a change from interaction to cessation of interaction between the signal and the region of adaptation. The locus of these pitch-related abnormalities, over a broad range of frequencies, points to interaction between that range and a smaller-frequency region where abrupt transitions in sensitivity occur.

Acoustic Stimulation↗
PubMed1990

Evaluation of the Words with Ipsilateral Competition test.

The Words with Ipsilateral Competition test was examined for test-retest reliability, item difficulty, and list differences. Results revealed that: (a) many test words contributed little or nothing to the overall test results; (b) list 1 and list 3 were not homogeneous in terms of item difficulty; (c) test performance was influenced by list order, and (d) test-retest reliability correlations were low but significant with test-retest differences ranging from -12% to 32%. Based on the present findings, it was recommended that use of the Words with Ipsilateral Competition test be discontinued until the test is revised.

Attention↗
PubMed1996

The perceptual evaluation of voice disorders.

The consent about the necessity of perceptual evaluation in the assessment of patients with voice disorders is almost unanimous. This is not the case with regard to the method or scale. This article gives an outline of historical backgrounds and presents a survey of contemporary perceptual rating scales. Reliability and influencing factors are discussed and recommendations are made with respect to clinical use.

Adolescent↗