A condition of diminished tone of the skeletal muscles, and the reduced resistance of muscles to passive stretching; may be a symptom with several LSDs
Decrease in resistance that a muscle normally offers to: palpation (muscle feels soft and lax) passive manipulation like flexion or extension of a limb. If accompanied by paralysis, hypotonia is a sign of lower motor neuron damage. Hypotonia also occurs in cases of cerebellar damage where both upper and lower motor neurons are intact.
Reduced muscle tension below resting levels.