palce coding **
-different frequencies (high and medium) coded by different locations on the basilar membrane
rate coding **
-lower frequencies coded by rate of firing
coincidence detector …how does it work? **
what are the receptive fields of basilar membrane and auditory cortex **
- frequency
- organ of corti
- hair cells
how does our auditory system allow us to spatially locate objects **
- phase difference: difference in the arrival times of sound waves at each of the eardrums
- intensity difference: sound comes from the direction of higher intensity
- model of coincidence detector
what receptive fields code for in the taste and olfactory systems **
- Taste: located all over tongue
- olfactory: clusters or zones of the olfactory build which respond to specific features or properties of odorant molecule; Glomeruli
V4 codes for? **
-responds to color (and form perception)
V5 codes for? **
-responds to movement
what happens to receptive fields as info is passed up the hierarchy **
they get bigger and more complex
dorsal stream
where
-V1 –> V5 and V3A –> action
ventral stream
what
-V1–>V2–>V3 and V4–> recognition
four stages of sensory perception and the exception to this rule …all senses have ?
- Sensory receptors
- Sensory thalamus
- Primary sensory cortex
- Sensory association cortex
**exception: olfaction and vestibular don’t seem to rely on thalamus
Thermoreceptor **
- skin sensory receptors
- free nerve endings
Nociceptor **
- skin sensory receptor
- sensitive to immune cells
Mechanoreceptor **
- audition sensory receptor
- common in ear and skin
chemoreceptor **
-taste and smell
other sensory systems, and what information they code **
- olfactory = smell
- gustatory = taste
- auditory = hearing
- visual = see
- somatosensory = touch
examples of sensory association cortex **
-auditory association cortex
-motor association cortex
-somatosensory association cortex (touch)
-visual association cortex
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