Glottal

k See Bilabial, Clicks, Consonants, Fricative, Fussing, Hiccups, Implosives, Labio-dental, Larynx, Lateral sound, Lingua-dental (or dental), Lingua-alveolar (or alveolar), Liquid, Plosive, Rhotic sound

Glioblasts

During the two-phase process of proliferation, neuroblasts and glioblasts are created in the future site of the ventricular system, with glioblasts going on to form the basic support structures in the mature brain.  They emerge during the second phase that occurs from about 2 to 4 months of gestation in the human, but which undergo …

Globalization

The term is usually referred to the highly uneven but increasing interconnection of the different parts of the world due to increases in information technology, new laws regulating the movement of capital, and new forms of media that has taken place since the 1990s.  See Literacy

Glial cells

First discovered by Santiago Ramon y Cajal (1832-1934) in 1891, they are cell types in the central nervous system (astroglial cells and oligoglial cells) connected to neural cells and, in contrast to these cells, having no role in information transport over long distances (i.e., in the conduction of nerve impulses).  Moreover, unlike neurons,  they are capable of …

Germinal (or germ) layers

The three primary germinal cell layers formed during gastrulation that line the central cavity of the gastrula, and which are partially determined in their developmental potential.  Ectoderm, the outermost layer, gives rise to the nervous system and outer integument.  Mesoderm, the middle layer, produces muscles, connective tissues, and the urogenital system.  Entoderm, the innermost layer, …

Gesell’s Developmental Schedules (or Scales)

A standardized procedure for observing and evaluating a child‚was developmental status at 10 ages from 1 month to 5 years. Evaluations are carried out in five, rather arbitrarily designated, domains or sub-tests labeled: gross motor, fine-motor, language, personal-social and adaptive.  Gesell cautioned against deriving a composite score or developmental quotient (DQ) and argued instead that DQs for …