Diagnosis of leukemia and aplastic anemia by the bone marrow culture

1) As the boundary of the outgrowth zone of the bone marrow culture is sharply defined from the surrounding area and the cellular density becomes very high in leukemia, diagnosis can be made with ease and certainty. 2) The differential diagnosis between aleukemic leukemia and aplastic anemia becomes easy by application of the tissue cuIture method. 3) The vital observation of blood cells were used in classification of leukemia by cellular systems, and it was discovered that there were a lot of patients with monocytic leukemia and relatively many with acute lymphatic leukemia. 4) Because the cellular growth in the bone marrow culture of aplastic anemia declines extremely and abundant fat cells are observed, the diagnosis of this disease is easily made by employment of this method.</p

Individual Differences in the Recognition of Facial Expressions: An Event-Related Potentials Study

<div><p>Previous studies have shown that early posterior components of event-related potentials (ERPs) are modulated by facial expressions. The goal of the current study was to investigate individual differences in the recognition of facial expressions by examining the relationship between ERP components and the discrimination of facial expressions. Pictures of 3 facial expressions (angry, happy, and neutral) were presented to 36 young adults during ERP recording. Participants were asked to respond with a button press as soon as they recognized the expression depicted. A multiple regression analysis, where ERP components were set as predictor variables, assessed hits and reaction times in response to the facial expressions as dependent variables. The N170 amplitudes significantly predicted for accuracy of angry and happy expressions, and the N170 latencies were predictive for accuracy of neutral expressions. The P2 amplitudes significantly predicted reaction time. The P2 latencies significantly predicted reaction times only for neutral faces. These results suggest that individual differences in the recognition of facial expressions emerge from early components in visual processing.</p> </div

Grand average ERP waveforms of N170 and P2 amplitudes.

<p>Electrode site P7 and P8 for N170, and O1 and O2 for P2 are displayed. Negative amplitudes are plotted upward.</p

Mean and standard error of ERP components elicited by facial expressions.

<p>(A) Amplitudes of N170. Negative amplitudes are plotted upward. (B) Latencies of N170. (C) Amplitudes of P2. Positive amplitudes are plotted upward. (D) Latencies of P2.</p

Mean and standard error of ERP components elicited by facial expressions.

<p>Mean and standard error of ERP components elicited by facial expressions.</p

Observation and action priming in anticipative tasks implying biological movements.

International audienceThe purpose of this study was to assess the effect of short-term priming in perceptual anticipation tasks involving point-light biological motions. After the production or the observation of a relevant or an irrelevant movement (action vs. observation priming), 11 right-handed volunteers were asked to anticipate, as quickly and accurately as possible, the end point of a pointing movement after the stimulus vanished upon completion of 60% of the total movement. Our results indicate that perceptual accuracy is significantly affected only with relevant observation priming. This suggests that perceptual anticipation tasks’ involving point-light biological motions implies specific perceptual competencies. (PsycINFO Database Record (c) 2016 APA, all rights reserved

Illustration of the stimulus-presentation procedure used in the current experiment.

<p>Each trial started with a fixation followed by a facial expression. The images of faces shown here do not depict the actual stimuli but are intended only as examples.</p

Topographical maps of N170 and P2 window for facial stimuli.

<p>Maps from a back view perspective. Negativity is shown in blue.</p