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Ch4_Psych100_Fall2010_JRF_2of3 - DD Outline Sensation...

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Outline Sensation overview Hearing (audition) Vision Chemical Senses Somatic Senses Announcement s Last day to drop course: Fri Oct 15 th Midterm Qs review in office hours this Thurs & next Mon Form to dispute a midterm Q due next Wed 5pm “Future Memory” tonite 8pm in Knight Auditorium, Spurlock Museum DD
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Concept check Rachel often has trouble hearing a student’s question, but by bending her ears she can hear better. She is manipulating her _____ to help her hear better. A) sensory receptors B) transduction mechanisms C) auditory cortex D) accessory structures
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Concept Check Dog whistles have a pitch too high for humans to hear. This means that the sound waves from dog whistles must have... (A) High amplitude. (B) Low amplitude. (C) Unusual timbre. (D) High frequency. (E) Low frequency.
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Poll Do you prefer for me to read the question out loud, or just put it on the screen and let you read it? (A) read out loud (B) just put on screen (C) no preference
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Hearing: How to Code? For low frequencies: Frequency matching : Cells fire at same frequency as the sound! Volley coding:  Cells “team up” For higher frequencies (>1000 Hz): Place coding:  Separate cells for different frequencies! Nerve deafness: Lose cells for high- frequencies from age, hearing damage L.O. 12
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Hearing Sound is modified by the pinna, ear drum, and ossicles; then it  is transduced into a neural signal by the hair cells in the  cochlea; this signal travels down the auditory nerve to the  thalamus, and finally gets sent to the auditory cortex. 
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Vision Light
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Light electromagnetic radiation
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What Influences Sensations of Light?
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