Volume 6 Issue 1, January 2003

Neural activity locally increases cerebral blood flow to deliver oxygen to working neurons. A new paper shows that astrocytes can detect activity at glutamatergic synapses via calcium changes in astrocytic endfeet and directly couple it to blood flow in vitro and in vivo.

Psychophysics suggests that binocular information at multiple spatial scales is used in depth perception. A new study provides physiological evidence for this idea in primary visual cortex.

In a recent Nature paper, reduction of postsynaptic activity within single neurons of an active network reveals a new role for Hebbian competition during early development.

A new study shows persistent activity in frontal eye field neurons while monkeys track the imagined motion of a dot that has disappeared, and finds this activity is tuned for speed.