The symptoms that show that someone has kuru can be split into three phases.
Headaches
Joint pain
Shaking
Loss of balance
Deterioration of speech
Decreased muscle control.
Sedentary stage
Become incapable of walking
Loss of muscle coordination
Severe tremors
Emotional instability – depression with outbursts of uncontrollable laughter.
Terminal stage
Cannot sit without being supported
Virtually no muscle coordination
Unable to speak
Incontinent
Difficulty swallowing
Unresponsive to surroundings
Ulcerations with pus and necrosis (tissue death).