## 4 Discussion  
As previously stated in the introduction, it is important to note that our investigation into number processing is not the first of its kind [39]. However, it is also essential to highlight again that studies utilising electroencephalography (EEG) to examine brain activity in this context have been relatively scarce in comparison to other neuroimaging techniques. In 1996, [PERSON] [40] employed ERPs to elucidate the neurophysiological correlates of numerical processing, specifically the differential brain potentials elicited by digits and number words as numerals. This was achieved through the implementation of an experimental paradigm comprising a number comparison task. The author indicated \begin{table}
\begin{tabular}{c c c} \hline \hline
**Time-Window** & **Electrode** & **Finding** \\ \hline
219 ms–251 ms & P8 & Digits elicited the most negative brain potential compared to all other categories. \\ \hline
299 ms–363 ms & P7 & Number words elicited the most negative potential compared to all other conditions. \\ \hline
427 ms–567 ms & F7 & Digits elicited the most negative brain potential compared to all other conditions. \\ \hline
427 ms–567 ms & F7 & Number words elicited the second-most negative brain potential and thus show quantity processing but less than digits. \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Summary of all key findings. Figure 5: Topographical maps including data from all electrode locations created for all 4 stimulus conditions for the time point 467 ms post-stimulus. Note that the largest negative-going ERPs were elicited by digits in the left frontal region (see location marked with a red circle). This is followed by number words. Both areas are marked with red circles. that a right occipito-parietal region was involved in number processing. Nevertheless, no significant difference was observed between the processing of digits and number words. Nevertheless, the brain area in question is consistent with our findings, despite the fact that we did identify a difference between number words and digits. In 2013, [PERSON] et al. [41] sought to identify a neurophysiological correlate in the human visual system with preferential responses to numerals analogous to the well-documented N170 event-related potential (ERP) component for face information processing [42]. However, the authors of this study employed intracranial electrodes that had been implanted on the surface of the brain in patients who were suffering from treated neuropathology. The authors report that inferior-temporal and anterior occipito-temporal regions are involved in the processing of visually presented numerals. Despite this, we believe that our findings contribute to a new understanding of how the human brain deals with quantities (numbers). Our focus is on describing the respective spatio-temporal differences in brain activities when compared to words and non-words. To elucidate this further, it is necessary to delve somewhat deeper into the subject matter. The term 'car' is defined as an object with seating and internal space, four wheels, and an engine that enables it to move. The concept of a number represents a specific quantity, which can be expressed numerically or verbally. A digit, or a series of digits (e.g., 23), or a number word (e.g., twenty-three), which is a series of letters, can be used to symbolise a distinct quantity. However, unlike objects such as 'car,' these symbols do not represent concrete entities. The present study tested the hypothesis that the idea of a certain quantity is more dominantly activated in the human brain through visual processing of digits as symbols compared to number words as symbols due to the inherent differences between the two. The results substantiate this hypothesis. It was observed that the left inferior fronto-temporal brain region (electrode F7) exhibited the most pronounced negative-going brain potential (largest amplitudes) in response to digit stimuli.