synaptic plasticity

Why can science still not define this most basic biological process?

Using optogenetics, researchers excite selected neurons to reinstate a fear memory that had been blocked.

Circadian neurons in fruit flies form synapses with different, noncircadian brain regions depending on the time of day.

Two studies provide insight into the genetics of the disorder and show again how complex it is.

Mice with human brain cells showed enhanced synaptic plasticity and learning, suggesting glia may be key to our cognitive prowess.
 

A newly recognized chemical factor in the brain, called neuritin, regulates plasticity and may play a role in depression.