1. •LPS and Orbicularis oculi
Dr.Samia Fatima
BY-

3. Levator Palpebrae Superioris
• Insertion: Anterior surface of tarsal plate,a few fibres to skin and
superior conjuctival fornix
Origin: lesser wing of sphenoid anterior to optic canal
• Function : elevation of upper eyelid by contraction
Innervation: Occulomotor nerve(III)_superior branch

7. Unique feature of LPS is a collection of
smooth muscle fibres passes from its
inferior surface to upper edge of
superior tarsus.
This group of smooth muscle
fibres(sup.tarsal muscle) help maintain
eyelid elevation and are innervated by
postganglionic sympathetic fibres from
sup.cervical ganglion

8. ORBICULARIS OCULI

9. Orbicularis
Oculi
• Palpebral part
Origin: medial palpebral
ligament
Insertion: lateral palpebral
raphe
Innervation: facial nerve
(VII)
Function: closes the eyelids
gently
2 parts
Palpebral part
Orbital part

10. • Orbital part
Origin: nasal part of frontal bone;frontal
process of maxilla:medial palpebral
ligament
Insertion: Fibres from an uninterrupted
ellipse around orbit
Innervation: facial nerve (VII)
Function: closes the eyelids forcefully