EOM Testing (2)

EOM Testing
MR innervation & primary action - ANS-CN III - inf
ADduction

LR innervation & primary action - ANS-CN VI
ABduction

SR innervation & primary action - ANS-CN III - sup
Elevation

SR secondary actions - ANS-ADduction
Intorsion

IR innervation & primary action - ANS-CN III - inf
Depression

IR secondary actions - ANS-ADduction
Extorsion

SO innervation & primary action - ANS-CN IV
Intorsion

SO secondary actions - ANS-Depression
ABduction

IO innervation & primary action - ANS-CN III - inf
Extorsion

IO secondary actions - ANS-Elevation
ABduction

Herrings Law of Equal Innervation - ANS-corresponding or yoked muscles of each eye
such as LLR & RMR receive equal innervation so that the eye moves together
(both eye's should look like they are pointed in same direction together)

Which nerve is most susceptible to injury & effecting what muscle? - ANS-Trochlear N.
SR