Chapter Nine Flashcards
Optic flow
Stream of visual stimuli that accompanies an observers forward movement throughout space
Auditory flow
Change in sound heard as a person and a sound source pass each other
How is sensitivity determined in a sensory system?
Receptor density
Where is sensory information first projected to in the neocortex?
Its primary cortical area (ie. primary auditory cortex, primary sensorimotor cortex, etc.)
Registration of physical stimuli from the environment by the sensory organs
Sensation
Subjective interpretation of sensations by the brain
Perception
Neural-spatial representation of the body or of the areas of the sensory world perceived by a sensory organ
Topographic map
Which sense takes up the most of the brain?
Vision
How does the retina discriminate between colours?
Cones respond to a specific range of wavelengths
Fovea
Region at the centre of the retina specialized for high acuity, that represents the centre of the eye’s visual field
What photoreceptor cells are found in the fovea?
Cones - no rods, and most of the cone cells are found in the fovea, but some extend peripherally
Which area of the visual field has the highest acuity?
The centre, at the fovea specifically
Where is the blind spot found?
At the optic disk in the retina, where the axons forming the optic nerve leave and blood vessels enter/exit
Condition in which a swollen optic disk can cause loss of vision, sometimes due to increased inter-cranial pressure or inflammation of the optic nerve (optic neuritis)
Papilledema
How does your visual system accommodate for your blind spot?
The blind spot in each eye is found in a different location within the visual field (both lateral to fovea) and so the eye puts both partial pictures together to form one full one
