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Vision Lecture 1
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1About half of the cortex is dedicated to processing vision
- ATrue
- BFalse
2Processing of the eye follows the following steps and regions. 1. Enters [blank_start]eye[blank_end], then [blank_start]optic nerve[blank_end], then [blank_start]optic chasm[blank_end], [blank_start]optic tract[blank_end], lgn, [blank_start]optic radiation[blank_end] then finally the [blank_start]visual cortex[blank_end]
- Aeye
- Bnose
- Coptic nerve
- Dlgn
- Eoptic nerves
- Feyes
- Goptic chassm
- Hcortex
- Ioptic chasm
- Joptic tact
- Kl.g.n
- Loptic radiasion
- Moptic tract
- Nopen chasim
- Ooptic radication
- Pvisual cortex
- Qoptic radiation
- Rvisual cortex's
- Sl.g.m
- Ti's
- UVisual cortex
- Vvisual cerebellum
- Woptical processing unit
- Xvisual image analysis nucleus
3A [blank_start]sclera[blank_end] is the white of the eye. It is a [blank_start]protective outer layer[blank_end] comprised of [blank_start]colagen[blank_end] and [blank_start]elastin[blank_end] fibres.
- Asclera
- Bprotective outer layer
- Ccolagen
- Delastin
4A [blank_start]choroid[blank_end] of the retina is a [blank_start]vascular[blank_end] layer providing [blank_start]oxygen[blank_end] and [blank_start]nutrients[blank_end] to outer retina especially [blank_start]fovea[blank_end]
- Achoroid
- Bvascular
- Coxygen
- Dnutrients
- Efovea
5The retinal pigment epethilium is a pigmented layer for light absorption and photoreceptor support
- ATrue
- BFalse
6There are [blank_start]2[blank_end] types of photoreceptors called [blank_start]cone[blank_end] and [blank_start]rod[blank_end]. [blank_start]Cones[blank_end] are concentrated in the [blank_start]fovea[blank_end] and are used for [blank_start]high acuity[blank_end], [blank_start]day vision[blank_end] and [blank_start]colour[blank_end] vision. [blank_start]Rods[blank_end] are used for [blank_start]night time[blank_end] vision and are not present in central retina
- A2
- Bcone
- Crod
- DCones
- Efovea
- Fhigh acuity
- Gday vision
- Hcolour
- IRods
- Jnight time
7Horizontal cells are [blank_start]Interneurons[blank_end] connecting photoreceptors laterally . Dendritic connections form [blank_start]plexiform layers[blank_end]
and Mediate receptive fields of [blank_start]retinal ganglion cells[blank_end]- AInterneurons
- Bplexiform layers
- Cretinal ganglion cells
8Bipolar cells Transmit signal from [blank_start]photoreceptor[blank_end] to [blank_start]retinal ganglion cells[blank_end] and [blank_start]amacrine cells[blank_end] these cells can communicate
via [blank_start]graded potentials[blank_end], rather than [blank_start]action potentials[blank_end]- Aphotoreceptor
- Bretinal ganglion cells
- Camacrine cells
- Dgraded potentials
- Eaction potentials
9Amacrine cells are Interneurons connecting [blank_start]retinal[blank_end] ganglion cells [blank_start]laterally[blank_end] .[blank_start]Dendritic[blank_end] connections form [blank_start]plexiform layers[blank_end] and Mediate [blank_start]receptive fields[blank_end] of retinal ganglion cells
- Aretinal
- Blaterally
- CDendritic
- Dplexiform layers
- Ereceptive fields
10There are [blank_start]3[blank_end] types of retinal ganglion output [blank_start]cells[blank_end] [blank_start]Parvocellular[blank_end] ,[blank_start]Magnocellular[blank_end] and [blank_start]Koniocellula[blank_end]
- A3
- Bcells
- CParvocellular
- DMagnocellular
- EKoniocellula
11Magnocellular cells have the following characteristics:
- ALarge receptive fields
- BSmall receptive fields
- CColour sensitive
- DNot colour sensitive
- EFunction unclear
- FAttention to detail
12What are the characteristics of Parvocellular cells?
- Asmall receptive fields
- Blarge receptive fields
- Cnot colour sensitive
- Dcolour sensitive
- Edetect fine features
- Ffunction not clear
13What are characteristics of K type cells
- Alarge receptive fields
- Bfunction not clear
- Ccolour sensitive
- Ddetect fine features
- Enot colour sensitive
- Fsmall receptive fields
14Label This diagram of the optic nerve
- Acup
- BLamina cribrosa
- CArtery
- D0.8-1.7mil axons
15This diagram shows the optic nerve system in the brain. The order that signals travel goes as follows. The eye to the [blank_start]optic nerve[blank_end] then the [blank_start]optic chiasm[blank_end] followed by the [blank_start]optic tract[blank_end] then the [blank_start]lateral geniculate nucleus[blank_end]. It goes to the [blank_start]optic radiation region[blank_end] then finally the [blank_start]visual cortex[blank_end].
- Aoptic nerve
- Boptic chiasm
- Coptic tract
- Dlateral geniculate nucleus
- Eoptic radiation region
- Fvisual cortex
16Vision is generated by [blank_start]photoreceptor[blank_end]s in the retina, a layer of cells at the [blank_start]back[blank_end] of the eye. The information leaves the eye by way of the optic nerve, and there is a partial [blank_start]crossing of axons[blank_end] at the optic chiasm. After the chiasm, the axons are called the optic tract. The optic tract w[blank_start]raps around the midbrain[blank_end] to get to the [blank_start]lateral geniculate nucleus (LGN),[blank_end] where all the axons must [blank_start]synapse.[blank_end] From there, the LGN axons fan out through the deep [blank_start]white matter[blank_end] of the brain as the [blank_start]optic radiations[blank_end], which will ultimately travel to [blank_start]primary visual cortex[blank_end], at the back of the brain.
- Aphotoreceptor
- Bback
- Ccrossing of axons
- Draps around the midbrain
- Elateral geniculate nucleus (LGN),
- Fsynapse.
- Gwhite matter
- Hoptic radiations
- Iprimary visual cortex
17The primary visual cortex Contains prominent stripes of white matter called [blank_start]stria of Gennari[blank_end] (striate or “striped” cortex)
Segregation of [blank_start]magno- and parvocellular channels[blank_end] is maintained- Astria of Gennari
- Bmagno- and parvocellular channels
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- 2nd Year Neuroscience (Vision) Quiz on Vision Lecture 1, created by Tino Mutasa on 24/04/2017.
- Author
- Tino Mutasa
- Language
- English
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