Extra Credit for Participating in Experiments
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Transcript of Extra Credit for Participating in Experiments
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Extra Credit for Participating in Experiments
Go to www.tatalab.ca to sign up
We are recruiting for a variety of experiments including basic
perception and ADHD
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ADHD Research ProjectWe are specifically recruiting individuals who
have been diagnosed with ADHD and are currently taking medication
Contact Karla at [email protected] for more information or to sign up
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Test Wednesday and Thursday this week!
• Matching• Multiple Choice
– Select the one best answer
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Test Wednesday and Thursday this week!
• True/False and Yes/No:– be sure to select true or false (or yes or no) for each answer.– Note that “yes” doesn’t mean “true”, it just means “yes”.
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A quick peek at all the other sensory systems we don’t
have time to considerTouch, Taste, Smell,
Proprioception, Thermoception and Balance
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How do we Stay Balanced?
The Vestibular System
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Vestibular System (Balance)
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Vestibular System (Balance)
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Vestibular System (Balance)
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Vestibular System (Balance)
Head accelerates this way
Cupula getspushed
Fluid goes this way
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Vestibular System (Balance)
Head accelerates this way
Cupula getspushed
Fluid goes this way
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Vestibular System (Balance)
• movement of the cupula is detected by hair cells
• hair cells in the vestibular system are more sensitive than hair cells on the basilar membrane!
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Vestibular, Visual, and Proprioceptive Systems Work Together
• Try standing on one foot with your eyes closed!
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Fun Facts about The Vestibular System
• Seasickness arises when the vestibular system and the visual system send conflicting information
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Fun Facts about The Vestibular System
• Seasickness arises when the vestibular system and the visual system send conflicting information
• People can be knocked down by moving walls!
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Fun Facts about The Vestibular System
• Seasickness arises when the vestibular system and the visual system send conflicting information
• People can be knocked down by moving walls!
• Alcohol causes the spins by (among other things) changing the density of the fluid in the semicircular canals
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Sensory Systems:
• Touch, temperature, taste, smell
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There are a variety of touch receptors
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• Touch receptors send signals to the somatosensory cortex via long axons in the spinal cord
• Signals are sent to the opposite (contralateral) side of the brain
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• Wilder Penfield - Montreal Neurological Institue - 1940’s
• Found somatotopic map by stimulating brain during surgery
The Homunculus
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• Two classes of thermoreceptors: warm and cold
Thermoception
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Taste (Gustation)
Taste buds contain
chemical receptors
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Taste
What are the various “tastes”?
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• Multi-dimensional scaling reveals several “varieties” of tastes:– sweet– salt– bitter– sour– umami (MSG) - possibly a protein
receptor– there may also be a lipid (fat) receptor
Taste