Blood supply and nerve supply for EOM?
More dense and finely tuned
EOM movements are more faster and more fatigued resistant due to?
white (fast) and red (slow but sustaining) muscle fibers
Primary action of obliques?
torsion
Superiors always?
intort
Superior oblique and superior rectus muscles contribute to this
Obliques always?
abduct
Superior oblique and inferior obliques cause abduction
Lateral rectus primary action?
Abduction
There are no secondary and tertiary actions
Lateral rectus origin is?
CTR –> Common tendenious ring
Lateral rectus innervated by which nerve and which blood supply?
Abducences nerve and lacrimal artery (which is part of the ophthalmic artery)
Medial rectus primary action is?
ADDuction
There is no secondary or tertiary actions
This is the strongest muscle of the grp
Medial rectus is innervated by which nerve and blood supply?
Opthlamic artery and oclumotor nerve
Medial rectus is needed for?
convergence
Medial rectus originates in?
Common tendinous ring and optic nerve sheath
Superior rectus primary action?
Secondary action?
Tertiary action?
Elevation
Intorision
Adduction
Superior rectus orginates in?
CTR and optic nerve sheath
Superior rectus recieves blood supply from?
Directly –> ophthalmic artery
Indriectly –> supra-orbital branch
Superior rectus receives innervation from?
Oculomotor nerve
Inferior rectus primary action?
Secondary action?
Tertiary action?
Depression
- Extorsion
- Adduction
Inferior rectus arise from?
CTR
Inferior rectus receives blood supply from?
Ophthalmic artery
Infra-orbital branch of the maxillary artery
Inferior rectus receives innervation from?
Oculomotor nerve, –> inferior division
Superior oblique primary action?
- Secondary action?
- Tertiary action?
Intorsion
- Depression
- Abduction
Superior oblique starts from?
Lesser wing of sphenoid bone and CTR
Superior oblique receives blood from?
Directly –> ophthalmic artery
Indirectly –> infraorbital branch
Superior oblique innervation from?
Innervated by the trochlear nerve
