Sensation, Perception And Consciousness Flashcards
Explain the primary receptor and stimulus for vision.
Eye- light receptive ganglion cells in retina.
Light- electromagnetic wave forms.
Explain the primary receptor and stimulus for audition
Ear- Tim panic membrane, hair cells, origin of corti,
Changes in air pressure,
Explain the primary receptor and stimulus for somatory sensory (touch)
Skin- various mechanoreceptors,
Mechanical pressure,deformation of the skin, changes in temperature.
Explain the primary receptor and stimulus for gaustation (taste)
Tongue- taste buds in papillae,
Changes in substances dissolved in saliva
Explain the primary receptor and stimulus for olfaction (smell)
Nose- silia in the mucus layer of the epithelium; top of nose and back of throat.
Airborne substances dissolved in mucus lining
What are rods?
Responsible for vision at low light levels ( scotopic vision)
Doesn’t mediate colour vision or low spacial activity
What are cones?
Active at higher light levels (photopic vision) capable of colour vision and high spacial activity.
What is mesopic?
Light levels where both cones and rods operate.
How does vision happen?
Sensory info captured, Converted to electrical energy, Info transferred to cells that form optic nerve, Synaptic transmission occurs for vision, Occipital lobe first in strait cortex, Then temporal region Then parietal lobe
What does the parietal lobe do in vision?
Guides visual motor action
What is perception?
Experimental conscious component of what we see,hear, feel, taste, smell of sensation.
What did Matlin and Foley 1992 find?
Physical stimuli is rich in info,
Human sensory system good at getting info
Concepts shape perception.
What is the mcgurk effect?
Senses work together to help perceive the world.
Brain fuses information together to make sense of it.
Illusion happens when auditory component of 1 sound is paired with visual companant of another to make perception of third sound
What’s the easy problem?
Where does it come from?
Brain activity, activity in brain for stimuli we process with and without awareness.
What’s the hard problem?
How, where, why?
How does brain activity become conscious awareness?
Where does it come from?
What’s the information flow?
Sensory input, matching process, sorted knowledge and perception and naming
What can information flow be?
Either bottom up or top down
What’s the bottom up approach to information flow?
Begins with sensory input,
Perception built by low level knowledge
What is the top down approach in information flow?
High cognitive influences,
Knowledge and experience influence our perceptions
What’s the experimental cog approach?
Controls the variables to study 1 particular variable/ dry stem.
Structures of brain deduced indirectly
What’s is cog neuropsychology?
Brain injuries or abnormalities,
Small samples, relies on double dissociation comparing patients
What are selective attentional processes?
Affects how much of what we process we are aware of
What are problems with selective attentional processes?
Vegetative states of sleep-
Patients with limited brain activity have some level of conscious.
Respond to stimuli might learn in our sleep
What is the binding problem?
If information is broken down how is it put back together?
Synchrony, weak structural functionalism, selective attention, gestalt- pragnanz
