Reflexes

Deep Tendon Reflexes

  • Jaw jerk reflex CN V
  • Biceps reflex C5/C6
  • Brachioradialis reflex C6
  • Extensor digitorum reflex C6/C7
  • Triceps reflex C7/C8
  • Patellar jerk reflex L2-L4
  • Ankle jerk reflex S1/S2

Cranial Nerve Reflexes

Name Sensory Motor
Pupillary light reflex II III
Accommodation reflex II III
Jaw jerk reflex V V
Corneal reflex, also known as the blink reflex V VII
Glabellar reflex V VII
Vestibulo-ocular reflex VIII III, IV, VI +
Gag reflex IX X

Grading Reflexes

Grade Response Significance
0 no response always abnormal
1+ slight but definitely present response may or may not be normal
2+ brisk response normal
3+ very brisk response may or may not be normal
4+ hyperactive with clonus always abnormal
5+ sustained clonus always abnormal

See Also

References