He hits the opposite arm with his open hand.
He stood motionless, his hands in the sleeves of the opposite arms.
So therapists help the patient develop ways to compensate, such as training him to make better use of the opposite arm or leg.
For mechanical efficiency, opposite arms usually swing with each leg while marching.
Often, the opposite arm is raised with the index finger of the hand pointing towards the sky.
He rubbed one hand up and down the opposite arm as if he were cold.
She hastily tucked the bleeding hand under the opposite arm.
When she needs to test something out she usually uses her opposite (left) arm or hand.
Lower to original position and repeat with opposite arm.
Try lifting and extending your opposite arm for each repetition.