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chapter 4 Flashcards

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1
Q

explain the sensations in the brina

A

it has no sensations

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2
Q

what do organs and senses do?

A

send out notifications to the brain

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3
Q

What is sensation?

A

detecting energy in the world and code it as neural signals our senses systemize and do the work

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4
Q

what is perception?

A

select, organize, and interpit the sensatoins

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5
Q

what is the thershold?

A

point where a change in stimuls can be detected (noticable differnce)

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6
Q

minimal value of a stimulus can be detected

A

absolute threshold

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7
Q

minimal value that can be detected within weight

A

difference threshold

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8
Q

what is the signal detection theory

A

to detect only stimulus is a dependent on stimulus intensisty, background noise, and random neural activity

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9
Q

what is below the threshold/?

A

subliminal stimuli

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10
Q

what frequency can we see with vision?

A

380-760 nm

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11
Q

liquid part of the eye between cornea and pupil

A

aqueous humor

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12
Q

what does the lens do

A

focuses the light on the retina

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13
Q

sphincter muscle that controls the shape of the eye

A

ciliary muscle

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14
Q

ability for the lens to take shape

A

accomidation

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15
Q

what does the pupil do

A

opening in the center of the eye that allows light to pass

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16
Q

what is the function of the iris?

A

2 bands of sphincter muscle that control the size of pupil, colored

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17
Q

what is the vitreous humor

A

gelatin inside the eye

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18
Q

what are floaters

A

debris in vitrious humor that cast a shadow on the eye

19
Q

what is the retina

A

black surface of eye that is lined by photoreceptors (light is inverted upside down and backwards)

20
Q

explain the fovea

A

(no rods) point of central focus, depression in retina, and center of macula

21
Q

blind spot, place at which nerves and blood vessels enter and exit the eye

A

optic disk

22
Q

explain rods

A

dim light, monocromatic, poor aquity-sharp, found in the perifery

23
Q

explain cones

A

bright light, in color, good aquity, fovea

24
Q

what happens when light hits the photoreceptors?

A

photo pigment breaks apart and stimulates the cell sending a messasge to bipolar cells the bipolar cells send it to the ganglion cells and it sends it to exit the eye at the optic disk

25
Q

where is the intersection of cross over?

A

optic chiasm

26
Q

where is visual info proccessed ayt/

A

thalamus but actually is lateral geniculate nurcleus of the thalamus

27
Q

what is the arago effect

A

no rods in fovea

28
Q

what is yello

A

blue and green

29
Q

red+green+blue =

A

white light

30
Q

who said we have three cells sensative to different colors red, green, blue

A

young, Helmholtz

31
Q

what is the oponent process theory?

A

we have two kinds of cells red-green, blue-yellow

32
Q

what is the retinex theory

A

all vision involves the retina but also the cerebral cortex

33
Q

two eye preception of vision

A

binocular

34
Q

turning off the eyes to pick up how close something is

A

convergence

35
Q

allows us to see in 3D

A

retina disparity

36
Q

being able to see in 3D

A

stereopsis

37
Q

seeing with one eye

A

minocular

38
Q

what is linear prespection

A

lines that run away from us

39
Q

texture gradient?

A

objects closer can tell more detail

40
Q

interposition?

A

closer objects tend to block objects that are further away

41
Q

relative size?

A

distance further away look smaller

42
Q

height on plane?

A

things further away tend to be higher

43
Q

motion paralax

A

when i move objects closer to me the more rapidlly than objects further away while moving

psychology (10 decks)

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