As stated above, the main cause of a Wrist Drop is overuse of the wrist whether it be with occupation or sports. Wrist drop may also be caused due to a trauma to the radial nerve by way of a cut or stab wound, or if a person suffers a gunshot wound to the wrist affecting directly the radial nerve. Another cause for a Wrist Drop is some sort of injury to the joint in the wrist or elbow resulting in persistent swelling of the elbow.
A. It's not a great idea. Cream tends to separate when frozen, and while you can freeze a carton of cream (double-wrapping in freezer bags is recommended), you can also shake it thoroughly after it thaws to reblend it (although it will not be as good as new).
The sugar and fats in the mix interfere with the formation of ice crystals, and it takes a colder temperature to get the ice cream to really freeze. Therefore, we can't use straight ice to chill the ice cream base, because the ice will melt before the base gets cold enough. Salt provides the solution. Similar to sugar, salt affects how water freezes and effectively lowers the freezing/melting point of water. Creating a saltwater slush and packing this around our ice cream base allows us to cool the base enough so that it starts to thicken and freeze before the ice melts completely.