Reflex Plantar Mono or Poly synaptic Calcaneal monosynaptic Ipsilateral Crossed -Extensor Ipsilateral and/or Contralateral response Pupillary Patellar monosynaptic Ipsilateral Muscle quadriceps Spinal cord spindle femoris Reflex Table Ipsilateral And Contralateral response Receptor Effector Type Calcaneal Achilles Tendon tendon Nerve or Spinal Region that is tested by the reflex Gastrocnemius Typical Response The normal patellar reflex response involves extension of the leg at the knee joint. Under 2 years old: normal toes down response Over 2 years old: fanning of toes