El doctor estudió la actividad cerebral de una persona usando electroencefalografía. Seleccionó el mapping EEG y vio que las ondas registradas tenían una determinada amplitud. ¿Qué tipo de análisis estuvo haciendo?
The doctor studied the person's brain activity using electroencefalografía. Selected the mapping EEG and saw that the waves recorded had a certain amplitude.  To determine the type of analysis being performed, we need to understand that Mapping EEG, also known as cerebral cartography or Mapping EEG in English, is a computerized analysis of the EEG trace. It represents the spontaneous and evoked EEG activity in the form of a topographic map projected onto the scalp. It can display the amplitude of a specific voltage peak, a variable of the spectrum of frequencies, or a measure of correlation of the recorded waves. In essence, it extracts a characteristic of the EEG signal and constructs a map on the scalp showing the distribution of values obtained or referred to each derivation. 

Given that the doctor was using the Mapping EEG and was analyzing the amplitude of the waves recorded, we can conclude that the type of analysis being performed was Mapping EEG based on the amplitude of the waves.