The oval window opens into the inner ear chamber known as the ____________________

Open head injuries involve fractures of the:

A) ears. B) shoulder. C) skull. D) all of the above.

Using different types of strokes to counterbalance the mechanical stresses of any one stroke on the hands and arms; for example, alternating pushing and pulling strokes reverses the line of force in the hands, first compressing then decompressing the

joints.