| A | B |
| abduction | moving a body part away from the midline of the body |
| adduction | moving a body part toward the midline of the body |
| ambulation | the act of walking |
| atrophy | the decrease in size or the wasting away of tissue |
| contracture | the lack of joint mobility caused by abnormal shortening of a muscle |
| deconditioning | the loss of muscle strength from inactivity |
| dorsiflexion | bending the toes and foot up at the ankle |
| extension | straightening a body part |
| external rotation | turning the joint outward |
| flexion | bending a body part |
| footdrop | the foot falls down at the ankle; permanent plantar flexion |
| hyperextension | excessive straightening of a body part |
| internal rotation | turning the joint inward |
| orthostatic hypotension | abnormally low blood pressure when the person suddenly stands up |
| plantar flexion | the foot is bent; bending the foot down at the ankle |
| pronation | turning the joint downward |
| range of motion | the movement of a joint to the extent possible without causing pain |
| rotation | turning the joint |
| supination | turning the joint upward |
| syncope | a brief loss of consciousness; fainting |