18 April 2007 IB 429: Animal Behavior Physiology of Behavior Prof. Fred Delcomyn Office:422A Morrill...
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18 April 2007 IB 429: Animal Behavior Physiology of Behavior Prof. Fred Delcomyn Office: 422A Morrill Hall Phone: 333-8793 e-mail: [email protected]
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Transcript of 18 April 2007 IB 429: Animal Behavior Physiology of Behavior Prof. Fred Delcomyn Office:422A Morrill...
18 April 2007
IB 429: Animal Behavior
Physiology of Behavior
Prof. Fred Delcomyn
Office: 422A Morrill HallPhone: 333-8793e-mail: [email protected]
18 April 2007
Behavior is a set of muscle contractions in a particular pattern and sequence.
18 April 2007
To understand the physiological basis of behavior, ask:
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:
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
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).
18 April 2007
Lecture Outline
I. Physiology of Sensory Systems
18 April 2007
Lecture Outline
I. Physiology of Sensory SystemsQuestion – How are sensory systems organized to allow animals to adapt to and respond to their environments?
18 April 2007
II. Neural Basis of Behavior
Lecture Outline
I. Physiology of Sensory SystemsQuestion – How are sensory systems organized to allow animals to adapt to and respond to their environments?
18 April 2007
II. Neural Basis of BehaviorQuestion – How does an animal’s nervous system orchestrate its behavior?
Lecture Outline
I. Physiology of Sensory SystemsQuestion – How are sensory systems organized to allow animals to adapt to and respond to their environments?
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?
18 April 2007
1. All neurons have some sensitivity to environmental stimuli.
Sensory Systems
18 April 2007
1. All neurons have some sensitivity to environmental stimuli.
Sensory Systems
2. Sense organs are specialized to respond to particular stimuli.
18 April 2007
Photoreception – detecting light (vision)
18 April 2007
Photoreception – detecting light (vision)
Chemoreception – detecting chemicals (smell & taste)
18 April 2007
Photoreception – detecting light (vision)
Chemoreception – detecting chemicals (smell & taste)
Mechanoreception – detecting physical touch or movement
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 April 2007
18 April 2007
Key concepts in sensory system function
1. Stimulus processing: Sensory systems report relevant information, not all information.
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.
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.
18 April 2007
18 April 2007
18 April 2007
Example of a mechanoreceptive system:
Auditory system (hearing)
18 April 2007
Example of a simple auditory system:
Moth ear
18 April 2007
18 April 2007
Example of a complex auditory system:
Bat ear
18 April 2007
Bat echolocation
18 April 2007
18 April 2007
Topographic mapping
18 April 2007
18 April 2007
Question – How are sensory systems organized to allow animals to adapt to and respond to their environments?
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.
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.
