1. Lab 6 Vision, Eyeball Movement & Balance System I…
Yes, unfortunately there is a II

2. 1 2
Lens 3 4 5 6 7 8
Suspensatory
Ligament 9

3. 1 2 3 4
Ciliary Body
Suspensatory Ligament 5 6

4. 3 2
Canal of Schlemm 1 9 6 8 10 4
Suspensatory Ligament 5 11
7 What fills this space?
Vitreous Body 12 13
Ciliary
Arteries 14 15 16

5. 2 1

6. Start with A B C A Vitreous Body Retina Lens Eyeball Sphenoidal Sinus
Hypophysis
Optic Nerve
Temporal Lobe Gray Matter
Basilar Artery
CSF in Sulcus
Pons
4th Ventricle
Cerebellum
Start with A

7. 3 4 5 1 2 6 7 8 9 10 3 LAYERS: OUTER: sclera cornea MIDDLE:
Iris ciliary body choroid
INNER:
retina 6 7
Anterior
chamber 8
LENS
Posterior
chamber 9 10
VITREOUS BODY

8. Horizontal section through anterior eyeball
Lens
Cornea
Anterior chamber
Conjunctiva
Ciliary body:
ciliary processes
ciliary muscle
Limbus
Posterior chamber 3 1 4
2 (space)
iris
Dilator pupillae muscle 7 6
Constrictor
Pupillae m. 5
(space) 10 9 8
Horizontal section through anterior eyeball

9. Anterior chamber Posterior chamber Iris Dilator pupillae
Pigmented posterior epithelium
Dilator pupillae
Constrictor pupillae
Lens fibers
----Pupil---- 1 2

10. Optic disc Pia-arachnoid Dura mater Optic nerve Sclera
Central retinal vessels
Pia-arachnoid
Dura mater
Sclera
Optic disc
Retina
Choroid 1 2 3

11. 4 1 3 (space 2 6 5 7 Ciliary body Anterior chamber lens Posterior iris
cornea 6
Ciliary processes
suspensory
ligament 5 7
Ciliary muscle
Ciliary body

12. Lens fibers Lens epithelium Lens capsule Ciliary muscle Iris
Ciliary processes
Posterior chamber
Anterior chamber
Canal of Schlemm 2 1
3 (space) 4 6 5
(space)

13. Cornea of the eye Anterior chamber Corneal endothelium CORNEAL STROMA
1 (space)
Anterior chamber 2
Corneal endothelium 3
CORNEAL STROMA
Corneal epithelium 4
Cornea of the eye

14. VITREOUS BODY 3 1 2 7 4 5 8 6 LAYER OF GANGLION CELL AXONS (invisible)
BIPOLAR CELLS
LAYER OF
GANGLION CELLS 1 2
FOVEA 7
CHOROID
LAYER
ORBIT
PIGMENT
EPITHELIUM 4
LAYER OF ROD &
CONE SEGMENTS 5
Retina
LAYER OF ROD
& CONE CELLS 8 6

15. Histology of retina Pigment epithelium SCLERA
Ganglion cell axons
Ganglion cell layer
Inner nuclear layer
Cell bodies of rods and cones
Outer segments of rods and cones
CHOROID
SCLERA
Pigment epithelium 3 1 4 2 5 6 7 8
Histology of retina

16. 1 2 3 4 5 6

17. Where is the calcarine cortex located?1 2 3
Calcarine Cortex (V1, Area 17) is along banks of calcarine sulcus
Where is the calcarine cortex located?
V2 and V3 surround V1
Where are the secondary & tertiary visual cortex?

18. 1 2
Chiasmatic
Groove

19. optic radiations 1

20. 1 2 3 4

21. 1 2 3 4

22. Where is the optic tract located?
LGN
Optic Tract
Where is the optic tract located?
Where is the lateral geniculate nucleus located?

23. 1
Primary visual
cortex, occipital
lobe
visual
radiations 2

24. 1
Optic radiations 4
Optic radiations 2
Optic tract 3
LGN
Midbrain-diencephalon junction, transverse section, myelin stain (Martin)

25. 1 2 3 5 4 Optic tract midbrain Visual radiations Lateral Ventricle
TEMPORAL
LOBE 3
Lateral
Ventricle 5
Primary visual cortex 4
OCCIPITAL
LOBE

26. 1 3 2 4 5 6 Optic tract passing position of Position of optic tract
lateral to hypothalamus
position of
optic nerve
Position of optic tract
(lateral to hypothalamus) 1 3
Optic
chiasm 2
hypothalamus 4
stalk of
hypophysis 5 6
hypophysis

27. 2
HYPOPHYSIS 1
OPTIC CHIASM
OPTIC TRACT 3
INTERNAL
CAROTID
ARTERY

28. 1 6 2 7 3 8 5 4 9 thalamus midbrain temporal temporal lobe lobe
upper fibers
of visual
radiations 8
Meyer’s
Loop 5
atrium 4
calcarine cortex
temporal horn of
lateral ventricle 9

29. Lower retina (upper visual field)
What are the 5 L’s?
Lower retina (upper visual field)
Lateral part of LGN
Loop of Meyer = Lower part (temporal) of optic radiations
Lingual Gyrus
In the conscious visual path, impulses travel from receptors in the retina to the visual cortex for perception of light stimuli. Visual impulses traverse rod and cone, bipolar, and then ganglion cells in the retina. Axons of ganglion cells exit the eyeball in the optic nerve and traverse the optic tract (after 50% decussation in the chiasm). The optic tract terminates in the lateral geniculate nucleus of the thalamus. Thalamic neurons then send axons through the optic radiations (retrolenticular fibers) to the primary visual (calcarine) cortex.