Components of Basic reflex pathways

  • Receptor
  • Affarent (sensory) neuron
  • Intermediate neuron in spinal cord/ brain stem
  • Efferent (motor) neuron
  • Effector organs (skeletal muscle)

Used to test spinal cord / brain stem integrity

Commonly used tendon reflexes are:

Cord / brain stem Level
Biceps C5 and C6;
Triceps C6 through C8
Quadriceps L2 through L4;
Gastrocnemius S1 and S2.
Abdominal T7 through T12
Jawjerk Pons
Corneal Pons
Accomodation Mid brain
Gag Medulla