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

• Neurologic exam