Extrinsic muscles of the eye

Question 1

Dorsal oblique muscle

Answer 1

O - dorsomedial to optic canal
I - dorsal globe deep to dorsal rectus insertion
Innervation - trochlear (IV) n.

Rotates eye medially around axis bulbi + ventrally

Question 2

Ventral oblique muscle

Answer 2

O - Palatine bone
I - Dorsolateral + lateral globe, deep to lateral rectus mm
Innervation - Occulomotor (III) n.

Rotates eye laterally around axis bulbi + dorsally

Question 3

Dorsal rectus muscle

Answer 3

O - bone between orbital fissure + optic canal
I - dorsal globe
Innervation - oculomotor (III) n.

Rotates eye dorsally

Question 4

Lateral rectus muscle

Answer 4

O - Ventral to orbital fissure
I - Lateral globe
Innervation - Abducens (VI) n.

Rotates eye laterally

Question 5

Medial rectus muscle

Answer 5

O - Ventral to orbital fissure
I - Medial globe
Innervation - Oculomotor (III) n.

Rotates eye medially

Question 6

Ventral rectus muscle

Answer 6

O - ventral to orbital fissure
I - ventral globe
Innervation - oculomotor (II) n.

Rotates eye ventrally

Question 7

Retractor bulbi muscle

Answer 7

O - Wall orbital fissure
I - Caudal globe via 4 fasciculi
Innervation - Abducens (VI) n.

Retracts globe into socket