<prompt> UMN lesion is characterised by :Weakness spasticityFasciculationsRigidityLocalised muscle atrophy  <response>: Answer is A Weakness and Spasticity: Spasticity is a characteristic of U.M.N. lesion. Fasciculations, hypotonia and muscle atrophy are features of LMN, not UMN palsy UMN LMN Power :Decreased 1. Power :Very much decreased Weakness; Q Muscle groups or Limbs being affected Weakness severe due to paralysis of individual muscles. not individual muscles Q Tone: Flaccidity Hypotonia Q 2. Tone : Hypeonia Clasp knife spasticityQ 3. WastingAtrophy is marked cardinal feature Q Wasting Atrophy :Minimal, if present and due to 4. Reflexes disuse atrophy. Reflexes Superficial reflexes :Lost Superficial Reflexes :Lost Q Deep reflexes :Exaggerated Q Deep reflexes :BriskExaggerated 2 Clonus :Absent Q Clonus :May be nt Q Plantar :Flexor or no response Q Plantar :Extensor Q 5. Fasciculations :Present Q Fasciculations :Absent 6. Reaction of degeneration in muscles :Present Q Reaction of degeneration in muscles :absent 