UNSW Embryology

Beginnings, Growth and Development

© Dr Mark Hill (2010)

Acknowledgements

Practical: Embryology of the Face and Ear

Aim:  To introduce students to the practical embryology of the face and ear.

Human Embryo Face (Carnegie stage 16 to 18, Kyoto collection)

Face Development cartoon (More? on a new page)

Page Links: Introduction | Audio | Specific Objectives | Key Reading | Learning Activities | UNSW Embryology Notes | Serial Images | Computer Activities | Questions | Glossary |

Audio

This is an unedited MP3 recording of the practical demonstration given on Wednesday 20th May 2009 3-5pm. Recording is provided for Educational purposes only. BGD-BFace and Ear2009-05-20.mp3 1:15:16   34 Mb

Recording Notes:

• The recording was paused during tutorial periods of the practical.
• The 5 pages of this laboratory are referred to in sequence though the recording.
• Descriptions and labelling was carried out on images located on each of the pages.
• As this is an unedited recording, some errors and inaccuracies may exist in the actual audio content.
• Always refer to your original practical handout notes and the online materials within the class.

Specific Objectives

1. To understand the formation and contribution of the pharyngeal arches to face and neck development.
2. To know the main structures derived from components of the pharyngeal arches (groove, pouch and arch connective tissue).
3. To know the 3 major parts (external, middle and inner) of hearing development and their embryonic origins.
4. To briefly understand some abnormalities associated with face and hearing development.

Key Reading

• BGD-B 2009 Laboratory Notes: Practical 6: Embryology of the Face and Ear (PDF 4 pages 372 kB)
• BGD Lecture: Development of the Face and Ear (17 May 2007)
• Human Embryology (3rd ed), WJ. Larsen Chapter 12 Development of the Head, the Neck, the Eyes, and the Ears pp349 - 418.
• The Developing Human: Clinically Oriented Embryology (7th ed) Moore & Persaud Chapter Chapter 10 The Pharyngeal Apparatus pp201 - 240; Chapter 19 The Eye and Ear pp465 - 483.

Learning Activities

Work through the linked online pages on the face and ear identifying:

• key contributing components
• key events in the development
• dynamic changes
• time course of development
• associated abnormalities

Today's class will not cover in as much depth the development of the skull, vascular, nose (sensory), eyes (sensory), taste (sensory), teeth, oral cavity and endocrine. You will also understand that there are many other developmental systems that could also relate to the face and ear.

UNSW Embryology Notes

These topics were not covered in depth in this class, but I have included links for your own independent learning: 6. Additional Information | Head Notes | Face Notes | Ear Notes Week 4 Placodes | Senses Development | Eye Development | Cardiovascular - Ventricles into the Aortic System | Musculoskeletal Development - Skull Development | Endocrine Development - Pituitary | Endocrine Development - Thyroid | Abnormal Development - Fetal Alcohol Syndrome |

Questions

These questions will not be specifically answered in this laboratory (so don't ask the Tutor) and are designed to make you think more about the topic.

1. Which of the pharyngeal arches contribute mainly to the face and which contribute mainly to the neck?
2. Which of the lips has the most common clefting during development and why?
3. Which is the more common clefting, cleft lip or cleft palate?
4. What developmental environmental factors may contribute to abnormalities of both the face and ear position?
5. What is the Eustachian tube and what is its function?
6. What are preauricular tags and what may they indicate?
7. At what age is hearing tested with Australian children?
8. What is otitis media and how does it occur?

Next

Link to next page in this Face Practical - Early Development The next page will introduce the first 3 weeks of development as they relate to the face and ear.

Glossary

Use the alphabetical list below to find definitions of terms that are new to you or use the Google search window to search UNSW Embryology site.

Quick Links

Everything Medicine 2009 ----------------- Found - Intro Embryo Lecture Found - Intro Embryo Practical Found Expert Tutorial-Histology SH - Respiratory Lecture ----------------- BGD - GIT Lecture BGD - GIT Practical Prac1 GIT Manual PDF GIT Development GIT Abnormalities ----------------- BGD - Head Lecture BGD - Head Practical Prac6 Head Manual PDF Head and Neck Development Face Development Ear Development Face Abnormalities ----------------- BGD - Endocrine Lecture Endocrine Development Endocrine Abnormalities ----------------- BDG - Male/Female Lecture BGD - Male/Female Practical Prac12 Male/Female Manual PDF Genital Development Male Development Female Development Genital Abnormalities ----------------- BGD-B Full Prac Manual PDF BGD-B FAQs BGD Phase 2 - Tutorial CBL ILPs 2009 eMed ----------------- Week by Week Movies Audio Development Notes System Notes

UNSW Embryology ISBN: 978 0 7334 2609 4

UNSW CRICOS Provider Code No. 00098G