Complex sentence: The recordings are taken when the muscle is at rest and when the muscle is contracting; the muscle will contract based on the directions of the one performing the test (instructing the patient to move certain body parts in certain directions forming muscle contractions).
Split into simpler sentences: The recordings are taken when the muscle is at rest and when the muscle is contracting. The muscle will contract based on the directions of the one performing the test (instructing the patient to move certain body parts in certain directions forming muscle contractions).