1. BBio 351 – December 3, 2015 Outline for today
Organization of nervous systems, continued
Communication between PNS & CNS
Spinal cord anatomy & organization
Brain anatomy & organization
Sensory systems!
General introduction
Hearing

2. Sensory systems
Review: what can be sensed?

3. 3 general properties of stimuli

4. 2 general kinds of sensory receptors
Sherwood Figure 6-2

5. How do these 2 kinds of sensory receptors receive and transmit info?
Receptor proteins?
Graded potentials (EPSPs/IPSPs)?
Action potentials?
Sherwood Figure 6-2

6. How do these 2 kinds of sensory receptors receive and transmit info?
Receptor proteins?
Graded potentials (EPSPs/IPSPs)?
Action potentials?
Sherwood Figure 6-2

7. Sensory receptor basics
Adaptation
“Tonic” vs. “Phasic”
STIMULUS
time
membrane
potential (mV)
RESPONSE
time

8. Adaption definition?
Adaptation example?
Adaptation usefulness?
What stimuli might NOT lead to much adaptation?

9. Specific senses that we will cover
Pathway to/within brain
Hearing
Smell
Taste
Vision

10. Auditory receptors: a type of mechanoreceptor
Stimuli detected by mechanoreceptors:
Touch
Pressure
Proprioception
Sherwood Figures 6-8 and 8-24

11. What do all mechanoreceptors have in common?
Lin & Corey (2005) via

12. Auditory receptors, in particular…
Sherwood Figure 6-11b

13. Transmission of sound waves through the ear
Sherwood Figure 6-20a

14. Pitch detection by the basilar membrane
Sherwood Figure 6-20

15. Pitch perfect: the auditory jingle

16. Auditory pathway to/in the brain
10th Martini Figure 17-32

17. Auditory computational challenges
How can sounds be localized in space?
How can language be understood?

18. Sound localization (left-to-right)
image:

19. Sound localization (left-to-right)