\documentclass{standalone}
\usepackage{standalone}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{tikz}
\usetikzlibrary{shapes, positioning}
\begin{document}
\begin{tikzpicture}
\tikzstyle{every node}=[font=\scriptsize]
\tikzstyle{apr}=[rectangle,
align=center,
text width = 3cm,
node distance = 1cm,
rectangle split, rectangle split parts=2,
draw, fill=white]
\node(1) [apr]
{
\textbf{Lore Ipsum}\\ \textbf{Dolor}
\nodepart{second} {$
\begin{aligned}
x = &\: 10 \\
y = &\: 20 \\
\dot{x} = &\: 0
\end{aligned}
$}
};
\node(4) [apr, right = of 1]
{
\textbf{Lore Ipsum}\\ \textbf{Stupid Descenders}
\nodepart{second} {$
\begin{aligned}
x = &\: 10 \\
\dot{x} = &\: 0
\end{aligned}
$}
};
\end{tikzpicture}
\end{document}
How can I make the tops of the nodes align instead of their centers?
Here is the image:


\node (4) [apr, right = of 1.base east, anchor=base west]could be one way, ornorthinstead ofbase. – Qrrbrbirlbel Dec 12 '12 at 18:22amsmathalign environments is& =instead of spacing tricks like= & \:. See Relation spacing error using =& in aligned equations – Qrrbrbirlbel Dec 12 '12 at 18:25