| A | B |
| abduction | away from midline of body |
| adduction | toward midline of body |
| ambulation | walking |
| atrophy | wasting away of tissue |
| contracture | shortening of muscle due to lack of joint mobility |
| dorsiflexion | bending toes and foot up at ankle |
| extension | straightening body part |
| external rotation | turning joint outward |
| flexion | bending body part |
| footdrop | permanent plantar flexion due to foot falling at ankle |
| hyperextension | excessive straightening of body part |
| internal rotation | joint turns inward |
| orthostatic hypotension | abnormally low blood pressure when person suddenly stands |
| plantar flexion | bending foot down at ankle; toes point |
| postural hypotension | same as orthostatic hypotension |
| pronation | turning body part down |
| range of motion (ROM) | movement of joint to extent possible without causing pain |
| rotation | turning joint |
| supination | turning body part upward |
| bedrest | ordered by a doctor to treat a medical condition |