In Boenninghausen's Therapeutic Pocket Book (TPB), the rubric "Excitement, Emotional" is found under the section titled Aggravations. This might seem counterintuitive at first glance, as "excitement" appears to be a mental state. However, Boenninghausen's repertory often lists emotional states and influences under the conditions that affect or modify symptoms. Emotional excitement is considered a common factor that can aggravate or influence the presentation of various symptoms. Therefore, it is categorized as an "aggravation" or a modifying circumstance rather than a primary mental state in the "Mind" section of the TPB.
The other options are less likely:
\begin{itemize}
\item Mind typically contains primary mental and emotional states, but "Excitement" in the TPB is often considered a modifier.
\item Sensations deals with physical feelings and general pathological states.
\item Intellect pertains to cognitive functions and mental faculties.
\end{itemize}
Thus, in the structure of Boenninghausen's Therapeutic Pocket Book, "Excitement, Emotional" is found under Aggravations.