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Patterns Of Interaction In The Lexical Development In Two Languages Of Bilingual Infants, Barbara Pearson, Sylvia Fernandez
Patterns Of Interaction In The Lexical Development In Two Languages Of Bilingual Infants, Barbara Pearson, Sylvia Fernandez
Barbara Zurer Pearson
We investigated the extent to which bilingual children follow the same patterns and timetable of lexical development as monolinguals. For a group of 20 simultaneous bilingual (English-Spanish) infants, ages 10 to 30 months, we looked at the patterns of growth in one language in relation to growth in the other and also with respect to growth in both languages combined. The MacArthur Communicative Development Inventories (CDI), standardized parent report forms in Spanish and English, provided measures of lexical growth in two languages at varying intervals within the age range. We plotted the two single-language measures, as well as Total and …
Cortical Type 2 Astrocytes Are Not Dye Coupled Nor Do They Express The Major Gap Junction Genes Found In The Central Nervous System, Daniel Belliveau, C. Naus
Cortical Type 2 Astrocytes Are Not Dye Coupled Nor Do They Express The Major Gap Junction Genes Found In The Central Nervous System, Daniel Belliveau, C. Naus
Daniel J. Belliveau
The O‐2A progenitor cell first described from the rat optic nerve is a bipotential precursor of oligodendrocytes and type 2 astrocytes. Each cell expresses specific markers that distinguish them as unique cell types. O‐2A progenitors cultured in high serum preferentially differntiate into type 2 astrocytes and when exposed to defined medium or low serum develop along the oligodendrocyte lineage. We analyzed the gap junction gene expression of type 2 astrocytes to determine if they are coupled to form a syncytium, like their type 1 astrocyte counterparts. Dye coupling experiments demonstrated that cortical type 2 astrocytes are not coupled, while type …