Accommodation

Question 1

What type of muscle is the ciliary muscle? What nervous system controls it?

Answer 1

Smooth muscle, parasympathetic nervous system

Question 2

3 layers of muscle in ciliary muscle

Answer 2

Longitudinal (Brucke’s), radial, circular

Question 3

Longitudinal bundle originates from what?

Answer 3

Epichoroidal stars, attach muscle to outer surface of choroid and continue forward to scleral spur

Question 4

What muscle has the most contribution to accommodation?

Answer 4

Circular/annular

Question 5

During parasympathetic stimulation/constriction, the scleral spur moves blank and opens up channels in the blank to increase blank.

Answer 5

Posteriorly, trabecular meshwork, effective filtration rate

Question 6

What are the 3 types of anterior zonules?

Answer 6

Anterior group
Equatorial group
Posterior group

Question 7

Where do the posterior zonules connect? Function?

Answer 7

Plicata to plana. Aid in pulling ciliary muscle back to unaccommodated state.

Question 8

What is the triad?

Answer 8

Pupillary constriction
Convergence of the eyes
Accommodation

Question 9

Accommodation pathway

Answer 9

Edinger-Westphal nucleus in midbrain to oculomotor, synapse in ciliary ganglion, post synaptic parasympathetic fibers run through short ciliary nerves to the muscle