When large populations of neurons are relatively synchronously activated, have an open field organization, and received similar inputs (e. g., excitatory), then a field potential is generated. This is called a local field potential when recorded in the brain tissue, and a far field potential when recorded at some distance away. One example of a far field potential is a(n) .
a. BOLD signal
b. EEG wave
c. neuronal spike
d. synaptic potential

When large populations of neurons are relatively synchronously activated, have an open field organization, and received similar inputs (e.g., excitatory), then a field potential is generated. This is called a local field potential when recorded in the brain tissue, and a far field potential when recorded at some distance away. One example of a far field potential is a(n) EEG wave.

Explanation:

Neural recordings from intracortical extracellular microelectrodes consist of two components superimposed into each other. Action potentials /spikes from single and multi unit activity and slow varying field potentials.

Local field potential mainly represents the inputs to a particular brain region and local processing take place around the recording electrode, while the spikes represent the outputs generated by the region.

EEG is a technique  that records brain's electrical activity. Graphical representation of the brain's cortical activity recorded from scalp.

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