How to make title in header of memoir class in lowercase?

I have a tex file of memoir class:

\documentclass[11pt]{memoir}\setlrmarginsandblock{3.5cm}{2.5cm}{*}\setulmarginsandblock{2.5cm}{*}{1}\checkandfixthelayout \begin{document}\chapter{Well-posedness of MV-SDEs withdensity-dependent drift}\newpageSomething here.\end{document}

Could you explain how to prevent the title

CHAPTER 1. WELL-POSEDNESS OF MV-SDES WITH DENSITY-DEPENDENT DRIFT

in the header row from being converted to uppercase? I would like

Chapter 1. Well-posedness of MV-SDEs with density-dependent drift

in slanted font. This would be less intrusive.