Orbital group muscles

Question 1

Orbicularis Oculi (Palpebral part)

Answer 1

Origin - Medial palpebral ligament
Insertion - Lateral palpebral raphe
Innervation - CNVII
Funciton - gently closes the eyelid

Question 2

Orbicularis Oculi (orbital part)

Answer 2

Origin - Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament
Insertion - uninterrupted ellipse around orbit
Innervation - CNVII
Function - closes the eyelid forcefully

Question 3

Corrugator Supercilli

Answer 3

Origin - medial end of superciliary arch
Insertion - skin of the medial half of the eyebrow
Innervation - CNVII
Function - Draws eyebrows medially and downward