Exam 9: Development of the Nervous System

Eyes and optic tectums grow at different rates.As they grow, the synaptic connections that were originally formed on the tectum by axons of retinal ganglion cells shift so that the retina is always fully and faithfully mapped on the tectum.This finding supports the

Most neural proliferation occurs in the layer of the neural tube that is adjacent to

The case of Genie emphasizes the role of

How long does one eye have to be totally deprived of stimulation early in life in order to produce significant reductions in the proportion of visual cortex neurons that can be activated by stimulation of the deprived eye?

After the formation of the neural tube, the number of cells destined to become part of the adult nervous system

-By 40 days after conception, three swellings become visible at the anterior end of the human neural tube.The most anterior of these swellings eventually develops into the

If an optic nerve of a mature frog is transected and half of the associated retina is destroyed,

The growth of new neurons in adults is called adult __________.

Growth cones extend and retract finger-like cytoplasmic extensions as if they were feeling their way.These extensions are called

Adult neurogenesis was convincingly documented in __________ before being described in mammals.

The first growth cone of a developing tract to reach the target is called a __________ growth cone.

In several respects, autism and ___________ are opposites, which is why it may prove useful to investigate them together.

In comparison to the cortices of rats that had been reared in enriched environments, the cortices of rats that had been reared by themselves in barren cages

The area of somatosensory cortex receiving input from the left hand was found to be bigger in

During the formation of the neural tube, a few cells break off from the neural plate and form a structure that lies dorsal to the tube.This structure is the neural

People with Williams syndrome tend to look like

Totipotential means that a developing cell

If just one eye is deprived of light for several days early in life, the width of the associated ocular __________ in layer IV of primary visual cortex become narrower.

Cells of the neural plate are

When it comes to synaptogenesis, neurons display a substantial degree of