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
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