Ch 2 Sensation and Perception Flashcards
transduction is the conversion of
stimulus from external and internal environment to electrical signals in the nervous system
sensation is like _____
transduction
perception is
the processing of sensory information
Nociceptors respond to
painful stimuli
Weber’s law
Initial value divided by jnd (just noticeable difference)
signal detection theory
perception can be affected by nonsensory factors
nonsensory factors
experiences (memory)
motives
expectations
duplexity or duplicity theory of vision
states that we have two photoreceptors
cones - color
rods- black and white
rods have _____ light absorbence
high
choroidal vessels
supply eye with nutrients
canal of schlemm
allows aqueous humor to drain
what pigment do rods contain?
rhodopsin
fovea only has _____
cones
Cornea
out clear layer of eye
What holds and constricts the lens?
suspensory ligaments
ciliary muscle
What produces the aqueous humor?
posterior chamber
Where is the aqueous humor drained?
canal of schlemm
What cells complement the rods and cones?
bipolar cells - connects rods and cones
ganglion cell - bipolar cells synapse onto ganglion cells
amacrine cell - receive many signals before passing information on
color is detected by what eye cells
rods/cones
shape is detected by what eye cells?
parvocellular
motion is detected by what eye cells
magnocellular
“Magnocellular specialize in Motion”
Visual pathway
Eye > rods/cones > Optic nerve > Optic chiasm > Optic tracts >Lateral geniculate nucleus (LGN) of the thalamus >visual radiation to visual cortex
What cells in the ear are like rods/cones?
Hair cells
The vestibule in the ear helps with….
balance in 3D space - acceleration
The vestibule has two parts the ….
utricle
saccule
Whats the ampulla?
The end of the semicircular canals
Pneumonic:
LGN -
MGN -
Lateral geniculate is for light (Eye)
Medial geniculate is for music (Ear)
What sense does not pass through thalamus for relay?
Smell
Omami -
Savory taste
What temperature is physiological zero?
98.6 F
37 C
proprioreception
spacial orientation receptors in muscles and joints
Gestalt principles says that …..
Ways the brain infers missing parts to a picture
Gestalt proximity priniple
elements close to each other generally tend be perceived as one unit
Gestalts Law of Pragnanz
Perceptual organization will always be as simple or symmetrical or regular
