The paper concerns the concept of gestalt in the framework of neuronal
mechanisms, Two hypotheses are discussed: 1) hierarchy of neurons (gn
ostic units), 2) synchronization of neurons, It is concluded that gest
alt is based on hierarchial vectorial organization of neurons. The hig
h frequency oscillations in gamma range (40-200 Hz) are of intrinsic o
rigin. They are operating as amplifiers of synaptic inputs of neurons
involved in gestalt representation.