| Code | Display | Definition |
| space-adaptation-syndrome |
Space Adaptation Syndrome |
A condition experienced by astronauts during initial exposure to microgravity, characterized by nausea, vomiting, headache, and general malaise |
| spaceflight-osteopenia |
Spaceflight Osteopenia |
Bone mineral density loss specifically caused by exposure to microgravity during spaceflight |
| spaceflight-induced-muscle-atrophy |
Spaceflight-Induced Muscle Atrophy |
The loss of muscle mass and strength specifically caused by exposure to microgravity during spaceflight |
| orthostatic-intolerance |
Orthostatic Intolerance |
The inability to maintain normal blood pressure and adequate cerebral perfusion while in an upright position after spaceflight |
| neurovestibular-adaptation |
Neurovestibular Adaptation |
Changes in balance, coordination, and spatial orientation that occur during adaptation to microgravity |
| space-motion-sickness |
Space Motion Sickness |
Motion sickness specifically occurring during spaceflight as the body adapts to microgravity |
| fluid-shift |
Cephalad Fluid Shift |
The movement of bodily fluids toward the head in microgravity, causing facial edema and congestion |
| cardiac-deconditioning |
Cardiac Deconditioning |
The reduction in heart mass and decreased cardiac output resulting from extended exposure to microgravity |
| immune-system-dysregulation |
Immune System Dysregulation |
Changes in immune system function during spaceflight, potentially resulting in altered response to pathogens |
| spaceflight-anemia |
Spaceflight Anemia |
Reduction in red blood cell mass during spaceflight |
| arterial-remodeling |
Arterial Remodeling |
Changes in arterial structure and function during spaceflight |
| intervertebral-disc-expansion |
Intervertebral Disc Expansion |
Expansion of spinal discs in microgravity, potentially leading to back pain and increased height |
| ocular-hypertension |
Spaceflight-Associated Ocular Hypertension |
Elevated intraocular pressure associated with spaceflight |