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Biomedical subjects

M A Naeser

Publications and source records attributed to M A Naeser.

7 recordsLinked to original sources
PubMed1992

Neuropsychological and neuroanatomical dimensions of ideomotor apraxia.

Fifty-five right-handed men with left hemisphere stroke were systematically investigated for ideomotor apraxia of various body parts. Standardized aphasia and apraxia examinations in all cases, and appropriately timed CT in 28 cases, were used for analysis of psychological and anatomical properties of ideomotor apraxia. It is not possible to ignore the modality of eliciting the movement (command or imitation) and the body part being moved (buccofacial, limb or whole body) from any comprehensive theory about ideomotor apraxia. Different levels of performance are seen with different body parts to different modalities in different aphasic groups. Some subtypes of ideomotor apraxia (buccofacial) have highly specified anatomical basis. Some (limb) have apparently distributed anatomies, and others (whole body) have as yet unknown bases.

Adult↗
PubMed1979

The resolving stroke and aphasia. A case study with computerized tomography.

A 39-year-old man suffered an intracerebral hemorrhage in the region of the left internal capsule deep to Wernicke's area. The location of the lesion was confirmed by computerized tomography (CT) performed two days postictally. Two weeks after admission, the Boston Diagnostic Aphasia Examination (BDAE) diclosed Wernicke's aphasia. We hypothesize that the hematoma exerted pressure on Wernicke's cortical area, thus causing the resulting Wernicke's aphasia at that time. A CT scan three months later showed absorption of the hematoma, with a residual low-density lesion deep to Wernicke's area, in the region of the arcuate fasciculus. At that time, BDAE testing disclosed a mild conduction aphasia. Serial CT scanning combined with discriminating clinical evaluation of aphasia provides a valuable opportunity for study of the processes underlying stroke resolution and aphasia.

Adult↗
PubMed1979

Effects of three syllable durations using the melodic intonation therapy technique.

Five nonfluent aphasics were presented English phrases with three syllable durations; a regular speech, non-intoned duration less than 1 sec per syllable, and two modified Melodic Intonation Therapy (MIT) intoned durations of 1.5 sec per syllable and 2.0 sec per syllable. All subjects had the greatest number of correct phrase productions at the longest MIT duration (p less than 0.001) and the greatest number of failures at the regular non-intoned duration. Therefore, syllable duration is an important acoustic parameter to consider when using an MIT technique with severe nonfluent aphasics.

Aged↗
PubMed1979

Semiautomated methods for quantitating CSF volume on cranial computed tomography.

Two methods for quantitating cerebrospinal fluid (CSF) volume in each hemicranium and on the total section on cranial computed tomography are described and compared. Both analyses utilize information input by the user, but differ in their treatment of volume averaging. The second analysis (Automated Section Information-I) measured partially volumed CSF more sensitively. Potential inaccuracies due to technical artifacts are summarized.

Cerebrospinal Fluid↗
PubMed1978

Lesion localization in aphasia with cranial computed tomography and the Boston Diagnostic Aphasia Exam.

Nineteen stable left-hemisphere stroke patients with aphasia were evaluated by the Boston Diagnostic Aphasia Examination (BDAE) and the Token Test (TT), and by cranial computed tomography (CT). The types of aphasia included Broca (three patients), Wernicke (four patients), conduction (four patients), transcortical motor (four patients), and global (four patients). The lesions, as localized by CT scan, were superimposed onto five composite lesion localization maps for these five aphasia syndromes. There was good correlation between BDAE aphasia type and lesion localization. On CT scans, the locations of cortical language areas lie in a specific relationship to parts of the ventricular system.

Aged↗
PubMed1977

Cranial computed tomography in aphasia. Correlation of anatomical lesions with functional deficits.

A variety of aphasic patients were studied to determine the relationship betweeen lesion size, as demonstrated by cranial computed tomography (CCT), and the type of aphasia, as classified by the Boston Diagnostic Aphasia Examination (BDAE). CCT demonstrated a variety of lesions. Those in nonfluent Broca's aphasics and fluent Wernicke's aphasics were separable into pre-Rolandic and post-Rolandic areas, respectively. Conduction, global, and anomic aphasics had different lesion sites. Correlation of lesion location by CCT with aphasia type supports Geschwind's concepts of aphasia.

Adult↗