Sensory Perception Flashcards
1
Q
What is extra-sensory perception (ESP)
A
- information sensed with mind (not through physical sense)
- 6th sense
- psychic abilities such a telepathy
2
Q
Differences between rods and cones
A
Cones:
- Far less numerous
- Located in center of retina
- Colour vision
- Iodopsin
- Low response to flicking light
Rods:
- Far more numerous
- Located around periphery of retina
- Not color vision
- Rhodopsin
- High response to flickering light
3
Q
What are some of the advantages to adapting to a stimulus?
A
- can distinguish between own stimuli (unimportant: caused by body) from external stimuli (important)
- receptors more alert to important stimuli —> initiate appropriate responses
4
Q
Disadvantages to adapting to a stimulus
A
- body becomes less perceptive of stimulus = more damage to organ or part of body in pain
5
Q
Why can we not tickle ourselves
A
- brain elicits response to unexpected stimuli but ignores expected harmful sensations
- cerebellum anticipates what tickling feels like and prepared body = ignore & suppress sensations before carried out
- brain sends out signal to ‘short circuit’ sensation =dampers effect of stimulus
=> cannot tickle ourselves consciously
6
Q
What is the blind spot
A
- area on retina cause by lack of receptors = optic nerves and blood vessels leave the eye
- cannot pickup visual stimuli
7
Q
Why do we not have an ‘empty space’ in our vision
A
- eyes work in conjunction —> one eye fills in blank spot for other eye and vice versa
- fields of vision of two eyes overlap —> small tremors in eye muscles keep blind spot moving whilst brain works to fill in gaps in our field of vision
8
Q
What is accommodation
A
- reflex action of the eye in response to focusing on a near object then looking at a distant object (vice versa), comprising coordinated changes in Convergence, lens shape and pupil size
- accomplishes by ciliary muscle —> contracts and relaxes to control lens of eye —> allowing it to flatten or thicken as needed for distant or near vision
