Areflexia
Grade = 0
absence of a reflex
Hyporeflexia
Grade = 1
Diminished reflex
Average reflex
Grade = 2
Hyperreflexia
Grade = 3
increased but not pathological (exaggerated reflex)
Markedly hyperactive
Grade = 4
often associated with clonus, but clonus is not required for grade 4
clonus
muscular spasm involving repeated, often rhythmic, contractions.
Biceps
C5
Brachioradialis
C6
Extensor Digitorum
C6
Triceps
C7
Adductor
L2
Patella
L4
Achilles
S1
Hamstring
S2