Scene description from the Johnson Space Center digital image collection (mission STS-045; 1992):
STS-45 Payload Specialist Dirk D. Frimout (left) and Mission Specialist (MS) C. Michael Foale (shirtless) conduct Detailed Supplementary Objective (DSO) 621, Inflight Use of Florinef to Improve Orthostatic Intolerance After Flight, on the middeck of Atlantis, Orbiter Vehicle (OV) 104. The purpose of DSO 621 is to evaluate the efficacy of the drug on postflight orthostatic tolerance using heart rate, blood pressure, stroke volume and other cardiovascular responses to orthostatic stress. A penlight flashlight freefloats above Frimout’s shoulder. The crewmembers are in front of the port side galley with a calculator, food containers, and DSO 621 supplies velcroed to it. Behind Foale are a camcorder and the forward middeck lockers.