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Neural Plate

Is a thickened region of the ectodermal layer that gives rise to the neural tube

Neural Tube

A structure in the early stage of brain development from which the brain and spinal cord develop

Neural Stem Cell

Is a self-renewing, multipotential cell that gives rise to any of the different types of neuron and glia in the nervous system

Ventricular Zone

The lining of neural stem cells surrounding the ventricles in adults

Progenitor cell

Is the precursor cell derived from a stem cell and it migraes and produces a neuron or a glial cell


A product of a progenitor cell that gives rise to any of the different types of neurons


A product of a progenitor cell that gives rise to different types of glial cells

Neurotropic Factor

Is a chemical compound that acts to support growth and differentiation in the dev eloping neurons and may act to keep certain neurons alive in adulthood

Radial Glial Cell

Is a path-making cell that a migating neuron follows to its appropriate destination

Growth Cone

Is the growing tip of an axon


A process at the end of a developing axon that reaches out to search for a potential target or to sample th intercellular environment

Cell-Adhesion Molecule (CAM)

Ia a chemical to which specific cells can aadhere, thus aiding in migation

Tropic Molecule

A signaling molcule that attracts or repels growth cones


Is the only class of tropic molecules yet isolated

Neural Darwinism

A hypothesis at the processes of cell death and synptic pruning are, like natural selection in species, the out come of competition among neurons for connections and metabolic resourses in a natural environment


A cell death that is genetically programmed

Chemoaffinity Hypothesis

A proposal that neurons or teir axons and dendrites are drown toward a signaling chemical that indicates the correct pathway


Is a condition in which vision in one eye is reduced as a result of the two eyes to point in the same direction

Critical Period

A developmental window during which some event has a long-lasting influence on the brain and is often refered to as a sensitve period


A process that predisposes an animal to form an attachment to objects or animals at a critical period in development


A process by which exposure to androgens ( male hormones) alters the brain, rendering it male-like


Is a failure of the forebrain to devlope

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