5 Choroid Flashcards
What three things entail the uveal tract?
Choroid
Ciliary body
Iris
The choroid extends from _______ to optic nerve. Located between the _____ _and _____.
Ora-serrated
Sclera and retina
What are the connective tissue layer borders of the choroid?
Suprachoroid
Bruch’s Membrane
What transverses a potential space between the sclera and the choroidal vessels? It contains fibroblasts and melanocytes.
Suprachoroid Lamina
The looseness of the _______ allows the vascular net to swell without causing detachment.
Suprachoroid lamina
The _______ space carries long posterior ciliary arteries and nerves from posterior to anterior globe
Suprachoroidal
A choroidal stroma is pigmented, vascularized, loose CT that contains what 5 cells?
Melanocytes Fibroblasts Macrophages Lymphocytes Mast cells
Choroidal stroma has collagen fibrils arranged circularly around vessels.. what are they?
Short posterior ciliary arteries
Tiers of vessels of Choroidal stroma from outer to inner?? (3)
Haller’s layer
Sattler’s layer
Capillary bed
Do choroidal veins have valves?
Nah
What nervous system innervates choroidal vessels?
Which causes vasoconstriction and reduced blood flow?
Which causes vasodilation, increased blood flow?
Autonomic
Sympathetic. From symp trunk
Parasympathetic. CNIII inferior division
What is a specialized capillary bed that contains fenestrated capillaries with most of them FACING THE RETINA?
Choriocapillaris
The choriocapillaris is the ______ in the macular area, where its the sole blood supply for this small region of the retina
Densest
What’s Bruch’s membrane from outer to inner? (Superficial to deep)
1 2 3 4 5
1 interrupted basement membrane of choriocapillaris
2 outer collagenous zone
3 elastic layer
4 inner collagenous zone
5 basement membrane of RPE cells
What’s responsible for the tight adhesion between choroid and outer pigmented retina layer?
Fine filaments from basement membrane of RPE merge with fibrils of inner collagenous zone
At the ora-serrata, the basement of the _____ is continuous with the basement membrane of the _____ of the ciliary body.
RPE
Pigmented epithelium
The _____ choroid provides nutrients to the outer retina.
The _________ choroid absorbs excess light
The ________ space provides a pathway for posterior vessels and nerves supplying the anterior seg
Vascular
Darkly pigmented
Suprachoroidal
The sensory innervation of the uvea is provided through the __________ branch of the trigeminal nerve
Nasociliary
_________ fibers form the superior cervical ganglion via ophthalmic and LONG ciliary nerves innervate iris dilator and ciliary muscles.
_______ fibers innervates iris sphincter and choroidal vessels
Sympathetic
Parasympathetic
What are deposits in the inner collagenous zone that can be small, pinhead-sized, yellow white spots in the fundus?
They contain cell fragments and accumulation of ________ material
DRUSEN
Basal laminar material
