An extension of cartilage to the external auditory canal cartilage c. The auricle is attached to the head by: a. Tympanic membrane, scutum (latero-superior).Ĩ. Mastoid, stapedius, pyramidal prominence 2Ĭarotid wall, eustachian tube, tensor tympani The rest of the posterior canal and the roof are formed by the squamosa. The anterior portion, the floor, and part of the posterior portion of the bony canal are formed by the tympanic part of the temporal bone. (medially) epitympanic recess (laterally) cranial cavity Boundaries of the external auditory canal Anteriorly: The skin over the bony canal is tight and has not subcutaneous tissue except periosteum. The skin over the cartilaginous canal has sebaceous glands, ceruminous glands, and hair follicles. The cartilaginous canal constitutes one-third of the external auditory canal (whereas the eustachian tube is two-thirds cartilaginous) the remaining two-third is osseous. 1-1) is made of elastic cartilage, the cartilaginous canal of fibrocartilage. (The temporalis muscle attaches to the squamosa portion of the temporal bone and not to the mastoid process.) 3. The following muscles are attached to the mastoid process: a. There are four parts to the temporal bone: a. It constitutes twothirds of the floor of the middle cranial fossa and one-third of the floor of the posterior fossa. The temporal bone forms part of the side and base of the skull. KJL Chapter 1: Anatomy of the Ear General Information 1. It is hoped that the reader will freely refer to the list of references for more in-depth dissertations. This revised third edition has been updated, as well as expanded, to make it more useful to medical students and physicians in other specialties. The first edition was compiled from the editor's notes for his own Board Examinations, with contributions from authorities in the field. The materials in this book came from numerous sources. It is a discussion of many current concepts in the field. It is not the intent of the authors to write a complete review of otolaryngology, much less a textbook of otolaryngology. Lee: Essential Otolaryngology and Head and Neck Surgery (IIIrd Ed) Preface This book is written for the young otolaryngologist who is already acquainted with the field through recent formal residency training, as well as for other physicians who are intereseted in concise descriptions of otolaryngologic conditions.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |