Extending an arm straight out to the side of the body would be described as a(n) _________ movement, while returning it back to the side of the body is a(n) _________ movement.

Extending an arm straight out to the side of the body would be described as a lateral movement, while returning it to the side of the body is a medial movement. Distal refers to being farther away from where the body part attaches to the trunk while proximal refers to being closer towards where the body part attaches to the trunk. Posterior refers to being toward the back of the body while anterior refers to being toward the front of the body. Inferior refers to being toward the lower part of the body while superior refers to being toward the upper part of the body.