Common symptoms of a concussion include all of the following except:
a.
headache
b.
disorientation and dizziness
c.
nausea
d.
chills

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.