1. 18 April 2007 IB 429: Animal Behavior Physiology of Behavior Prof. Fred Delcomyn Office:422A Morrill Hall Phone:333-8793 e-mail:delcomyn@life.uiuc.edudelcomyn@life.uiuc.edu

2. 18 April 2007 Behavior is a set of muscle contractions in a particular pattern and sequence.

3. 18 April 2007 To understand the physiological basis of behavior, ask:

4. 18 April 2007 How is a nervous system able to generate a pattern of impulses targeted to the appropriate muscles at the appropriate time? To understand the physiological basis of behavior, ask:

5. 18 April 2007 Behavior is determined in part by the amount of tissue in the nervous system and how it is assembled (its structure). Basic concepts

6. 18 April 2007 Behavior is determined in part by the amount of tissue in the nervous system and how it is assembled (its structure). Basic concepts It is also determined by how the neural tissue works (its function).

7. 18 April 2007 Lecture Outline I. Physiology of Sensory Systems

8. 18 April 2007 Lecture Outline I. Physiology of Sensory Systems Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?

9. 18 April 2007 II. Neural Basis of Behavior Lecture Outline I. Physiology of Sensory Systems Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?

10. 18 April 2007 II. Neural Basis of Behavior Question – How does an animal’s nervous system orchestrate its behavior? Lecture Outline I. Physiology of Sensory Systems Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?

11. 18 April 2007 I. Physiology of Sensory Systems Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?

12. 18 April 2007 1. All neurons have some sensitivity to environmental stimuli. Sensory Systems

13. 18 April 2007 1. All neurons have some sensitivity to environmental stimuli. Sensory Systems 2. Sense organs are specialized to respond to particular stimuli.

14. 18 April 2007 Photoreception – detecting light (vision)

15. 18 April 2007 Photoreception – detecting light (vision) Chemoreception – detecting chemicals (smell & taste)

16. 18 April 2007 Photoreception – detecting light (vision) Chemoreception – detecting chemicals (smell & taste) Mechanoreception – detecting physical touch or movement

17. 18 April 2007 1. All neurons have some sensitivity to environmental stimuli. Sensory Systems 2. Sense organs are specialized to respond to various stimuli. 3. Sense organs filter stimuli.

18. 18 April 2007

19. Key concepts in sensory system function 1. Stimulus processing: Sensory systems report relevant information, not all information.

20. 18 April 2007 Key concepts in sensory system function 2. Tuning: Sensory receptors are tuned to biologically relevant stimuli. 1. Stimulus processing: Sensory systems report relevant information, not all information.

21. 18 April 2007 Key concepts in sensory system function 2. Tuning: Sensory receptors are tuned to biologically relevant stimuli. 3. Topographic organization: Sensory regions of brains are topographically organized. 1. Stimulus processing: Sensory systems report relevant information, not all information.

22. 18 April 2007

24. Example of a mechanoreceptive system: Auditory system (hearing)

25. 18 April 2007 Example of a simple auditory system: Moth ear

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27. Example of a complex auditory system: Bat ear

28. 18 April 2007 Bat echolocation

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30. Topographic mapping

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32. Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?

33. 18 April 2007 Question – How are sensory systems organized to allow animals to adapt to and respond to their environments? 1. – Functionally, they take advantage of natural neural sensitivity to environmental stimuli to detect behaviorally relevant information.

34. 18 April 2007 Question – How are sensory systems organized to allow animals to adapt to and respond to their environments? 1. – Functionally, they take advantage of natural neural sensitivity to environmental stimuli to detect behaviorally relevant information. 2. – Structurally, they are organized to build a sophisticated view of an animal’s surroundings.