The Ectodermal Placodes
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Work in progress, expect frequent changes. Help and feedback is welcome. See discussion page. |
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Contents
Preknowledge, Objectives and Competencies
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In this unit we will concentrate on the region of the ectoderm adjacent to the cranial neural plate (ectodermal placodes). We will explore the contribution of the ectodermal placodes to sensory structures associated with the head. We will examine the relative contribution of the ectodermal placodes and the cranial neural crest to cranial sensory structures and the cranial peripheral nervous system |
At the end of this unit you should be able to:
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Activities and Reading Material
| During class, we will look at the structures that derive from the ectodermal placodes. We will examine the table provided in the lecture notes to explore the multiple structures that give rise to the peripheral nervous system and what the possible implications of this may be. We will also explore the genetic framework that coordinates these different aspects of development of the different parts of the nervous system
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- Jacobsen Chapter 4
Assignments
| After class, you are expected to review your notes and use the assigned reading material to contribute to the questions and definitions sections below. Please use the discussion page if you want to discuss any particular topic on the material. You are also welcome to add links to videos or audio files in the Media box or links to online resources in the Web Resources box below. |
Questions
| In what way is the origin of the peripheral nervous system different in the cranial and trunk regions? |
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| Would it be fair to say that part of the nervous system does not originate from the neural plate? Explain your rationale. |
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| What are the genetic markers that identify the region of the ectoderm that will give rise to the ectodermal placodes? |
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Definitions
You should be able to provide a comprehensive functional and structural definitions for the terms associated with this topic:
(ectodermal placodes, otic placode).
| Ectodermal Placodes: |
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| Otic Placode: |
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Additional study material
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Related Content
Go back to the introductory page, return to Unit 5: The Neural Crest, or continue with Unit 7: Specification and Differentiation of Neural Elements.
