Sensation / Perception Flashcards
Blind spot
Back of eye with no receptors
Start
Capsaicin
Triggers release of substance P
Cataract
Disorder where eyes become cloudy and blurry
Cochlea
Shell shape structure that contain receptors for hearing
Conduction deafness
When bones connected to the eardrum fail
Cones
Receptors adapted for color vision
Convergence
eyeballs come together to focus
Cornea
Rigid transparent structure on the surface of the eyeball
Cutaneous sensation
Sensation on hands and feet
•skin receptors
Dark adaptation
Eyeballs adjust from dark to light
Electromagnetic spectrum
Color spectrum
Fovea
Where most of the cones are congregated
Frequency principle
Pitch of sound equals wave frequency
Ganglion cells
Received input from bipolar cells
Gate theory
Gates in out spinal cords for releasing pain killers
Glaucoma
Too much pressure within the eyeball
Hertz ( Hz)
Unit of frequency (1cycle per sec)
Absolute sensory threshold
Average sensation 50% of the time
- hear a watch ticking 20 feet away
- see a candle flame from 50m away at night
- taste a teaspoon of sugar in 2gallons of h2o
- feel a need wing from 2mm away
- smell perfume in a 2 br apt.
Hyperopia
Can’t see up close / far sidedness
Induced movement
Feeling that an stationary object is moving
Iris
Colored part of eye
Lens
Part of eye that focuses on an object
Loudness
The amplitude of a sound wave
Moon illusion
Difference between the size of the moon where it looks bigger.
Motion parallax
Where two things close together are moving at different speed.
• in car looking at plane that looks slow
Myopia
Can’t see things that are far away /near sidedness
Negative afterimage
When you see the opposite color on the color wheel
Nerve deafness
Hearing loss due to damage of the cochlea, hair cells and auditory nerve
Olfaction
Sense of smell
Opponent process theory
Theory of color in terms of the color wheel of paired opposites
Optic nerve
Connects the eye to the brain
Phantom limb
Continuing sensation of an amputated body part
Pheromone
Odorous chemical sent to attract other members of the same species
Pitch
Frequency of sound waves
Place principle
Identifying pitch by which auditory neurons
Presbyopia
(Hyperopia)
The inability to focus on nearby objects
Pupil
Opening in the eye through which light enters
Retina
Back surface of the eyeball (movie screen / upside down)
Retinal disparity
Difference in the angle you are looking at that creates depth perception
Retuned theory
Retina works in conjunction with the cerebral cortex