Cutaneous myopericytoma is a rarely reported mesenchymal neoplasm with a benign biologic behavior. It is seen more commonly in males and typically occurs in adults on the distal extremities. To the best of our knowledge, there are only 13 reports describing 45 cases of cutaneous myopericytoma in the literature. The 3 cases in this report expand the clinical presentation and reinforce the histop...

A mathematical model is proposed which is able to describe the most important features of cell differentiation, without requiring specific detailed assumptions concerning the interactions which drive the phenomenon. On the contrary, cell differentiation is described here as an emergent property of a generic model of the underlying gene regulatory network, and it can therefore be applied to a va...

This study examined the effects of assessor-related factors (i.e., type of assessor) and assessee-related factors (i.e., type of assessee profile) on the construct validity of assessment center ratings. In particular, 3 types of assessors (26 industrial/organizational [I/O] psychologists, 20 managers, and 27 students), rated assessee performances that varied according to cross-exercise consiste...

Emotion differentiation refers to the level of specificity with which people distinguish between their emotional states and is considered to play an important role for psychological well-being. Yet, not much is known about what characterizes people high or low in emotion differentiation and what underlies these differences. In 2 studies involving experience sampling (Studies 1-2) and lab based ...

The spatial patterning of prestalk and prespore cells in the slug arises from the differential sorting of newly differentiated cell types as the mound forms. This pattern is highly organized along an anterior-posterior axis and is constant irrespective of the size of the organism. Cell-type differentiation is plastic until late in development. A change in the ratio of cell types resulting from ...

The Dictyostelium cudA gene encodes a nucleoplasmic protein that is essential for normal culmination. There are no functionally characterised homologues in other organisms but there is a related gene of unknown function in Entamoeba histolytica. The cudA gene is expressed by the prestalk cells that constitute the slug tip (the pstA cells), it is not detectably expressed in the band of prestalk ...

In our previous study (Brown and Soltysik 1971) we investigated the same-different differentiation between auditory compounds in a threepair design with dogs (Chorqzyna 1967). In this procedure, reward was presented for responses (CRs) to the second member of a positive pair, consisting of two different tones, while no reward was given for two negative pairs, consisting of like tones. It was fo...

The effects of partial bilateral lesions situated in the prefrontal region on go-no go differentiation with symmetrical reinforcement were investigated in dogs. Bilateral removals of proreal gyri and medial cortical surface involving pregenual, genual, precruciatal (XM), subcallosal or medial subproreal areas did not impair performance of this test. Very small cortical lesions of proreal areas ...