Biopsych Final

- Patch of tissue on the dorsal surface of the embryo

- development begins by chemical signals from ------

Cells that have the ability to become any type of cell in the body if transplanted to the appropriate site

With development, cells are limited to becoming on of the range of mature nervous system cells

- the rapid increase in the number of neurons that follow the formation of the neural tube

- chemically guided by ____ and ______

Cells lack axons and dendrites during this process, two types _____ and _____ and two methods ______ and ______

- radial: moving OUT, along the radial glial cells

- tangential: moving UP

- somal: extension develops that leads migration, cell body follows (radial or tangential)

- glial-mediated migration: cell moves along a radial glial network (radial ONLY)

- structure dorsal to the neural tube and formed from neural tube cells
- develops into the cells of the peripheral nervous system

- after migration, cells align themselves with other cells and form structures
- aided by CAMs

- aid both migration and aggregation
- recognize and adhere to molecules

- amoebalike strudture at the tip of each growing axon or dendrite that guides growth to the appropriate target

- postsynaptic targets release a chemical that guides axonal growth
- does not account for circuitous routes often observed

The tendency of developing axons to grow along the paths estabilished by preceding axons

- seeks to explain topographical maps
- axons grow from one topographic surface to another and are guided to specific targets, guided to destinations by 2 intersecting signal gradients

Promote growth and survival, guide axons, stimulate synaptogenesis

NGF