A chronic degenerative disease that weakens the body while leaving the mind intact, which had confined Admiral Mark Jameson to a support chair before his reckless use of a Cerberan rejuvenation drug.
Iverson's disease is an incurable condition of the 24th century that progressively robs sufferers of muscular strength without affecting their mental faculties. Those in its later stages need mechanical help to move about.
It is featured in the Next Generation episode Too Short a Season. Admiral Mark Jameson, an elderly Starfleet negotiator, comes aboard the Enterprise-D in a motorised chair, having lived with the disease for some years, to deal with a hostage crisis on Mordan IV. To the surprise of Doctor Crusher he grows stronger by the hour, soon standing and walking unaided.
Jameson admits that he obtained a rejuvenating compound on Cerberus II and has taken his own two-year supply and his wife's all at once. The drug wipes away every trace of Iverson's disease and decades of age besides, but the overdose tears his body apart and he dies on Mordan in the arms of his wife, Anne.