Temporal bone fractures are subdivided into petrous apex and nonpetrous apex fractures. Styloid process eventhough is closely associated with temporal bone, is not considered as a part of it. Choose from 500 different sets of temporal bone flashcards on quizlet. The invention and application of fine slice mdct has revolutionised imaging of the temporal bone and inner ear, providing greater resolution and enabling more accurate evaluation.
An interactive webbased learning module on the temporal bone has been developed. Temporal bone anatomy cadaveric dissection iowa head. We present fine slice mdct multiplanar reformatted images through the temporal bone, with relevant structures of the anatomy clearly labelled. The student of the temporal bone, the resident struggling to master the intricate surgical anatomy of this most crowded and complicated bone in the human body, and the otologic surgeon will find this atlas an invaluable reference work and companion to have on hand in the dissecting room and surgical theatre. Page 2 of 26 learning objectives to revisit the anatomy of the temporal bone to identify pathologically important anatomical landmarks of the temporal bone on ct to provide an overview of the common pathologies affecting the temporal. The manual is designed to complement and reinforce the experiences of course participants, comprehensively covering the normal and surgical anatomy of the temporal bone and all aspects of basic.
Anatomy and inflammatory and neoplastic processes1 from a clinicalradiologic standpoint, there are a limited number of structures and disease entities in the temporal bone with which one must be familiar in order to proficiently interpret a computed tomographic or magnetic resonance imaging study of the temporal bone. On a lateral view of the temporal bone, such as figure 1. The course seeks to improve the surgical skill of participants through a series of dissection exercises and. The lower portion of the bone articulates with the mandible, forming the temporomandibular joint of the jaw.
Download pdf temporal bone ct and mri anatomy free. This complex anatomy is a challenge for students in the basic science and medical disciplines. Planes of scanning axial 30 degrees to anthropological base line parallel to lateral scc. On the other hand, in many places it has become difficult to provide a sufficient number of. The detailed ct anatomy of the temporal bone was documented, complemented by images from live patients.
It contains the middle and inner portions of the ear, and is crossed by the majority of the cranial nerves. Temporal bone surgery or middle ear surgery is accomplished primarily in order to attach cochlea implants as hearing aids and to remove tumors mastoidectomy john et al. The squama forms the anterior and upper part of the bone, and is scalelike, thin, and translucent. Anatomy and surgical approach of the ear and temporal bone. Figure 1 shows a nearcomplete cortical mastoidectomy with mastoid tip intact, atticotomy, posterior tympanotomy, and dissection of the retrolabyrinthine and nfralabyrinthine areas. Ct imaging anatomy and pathology in multiple imaging planes is very well depicted. To decompress the facial nerve from the cochleariform process cp to the stylomastoid foramen smf, the dissection of the facial recess fr, careful bone reading, and sufficient magnification are the keys. This book provides a complete overview of imaging of normal and diseased temporal bone. The temporal bones are situated at the sides and base of the skull. The middle ear consists of the tympanic cavity and. Bone windows osseous disease prostate cancer with metastic disease to the left petrous bone and clivus prostate and often breast cancer metastases result in sclerotic lesions that have higher density, due to increased osteoblastic activity in the bone. Detailed discussion of anatomy provides essential background on the complex structure of the temporal bone, as well as the external auditory canal, middle ear and mastoid air. The anatomy of the temporal bone and its variations.
Interactive webbased learning module on ct of the temporal. The aim of this presentation is to demonstrate imaging findings of common diseases of the temporal bone. The human temporal bone contains a large number of complex structures within a small space. This portion of the temporal bone is located posteriorly.
Mastoid bone mastoid portion of temporal bone is the inferiorly extending projection seen on lateral surface. There are a number of openings and canals in the temporal bone through which structures enter and. Following this lecture, the student should be able to. It consists of four parts arranged round the external auditory canal and tympanic cavity in such a manner. Temporal bone anatomy cadaveric dissection iowa head and. Choose from 500 different sets of temporal bones anatomy flashcards on quizlet. Anatomy of the temporal bone 379 with the recent development of highresolution computed tomography ct, there is a growing need to explore the full potential of this new method in demonstrating the detailed anatomy of the temporal bone. The temporal bone is one of the most important calvarial and skull base bones. An outstanding textbook on the anatomy of the temporal bone with surgical information, lavishly illustrated,with a set of unique stereoscopic, threedimensional color reels that assist the reader in accurately visualizing the complex structures of the inner ear. Apr 26, 2020 the temporal bones are a pair of bilateral, symmetrical bones that constitute a large portion of the lateral wall and base of the skull. The london temporal bone dissection course perfection in dissection 15th to 17th june 2020 course fee.
Surgical anatomy of the temporal bone and measurements. Anatomy of the temporal bone with surgical implications. If you would like to enlarge the presentation or view corresponding notes, select the open in a new window icon, which is located on the button right of the presentation. The temporal bones on the sides and base of the skull protect the brain and surround the ear canal. The human temporal bone collection at the massachusetts eye and ear infirmary, comprising 1518 specimens from 862 individuals, served. Temporal bone dissection guide 2nd edition pdf free pdf. Temporal bone dissection guide 2nd edition pdf free download ebook description with the second edition of this manual we intend to help you learn all the basic techniques of temporal bone surgery and to encourage practice in the steps needed to develop your surgical skills to their fullest potential. Full text get a printable copy pdf file of the complete article 4. Temporal bone download ebook pdf, epub, tuebl, mobi. Multidetector temporal bone computed tomography examinations should be performed in patients with a clinical or radiographic suspicion of temporal bone fracture. Locate the temporal bone and describe its position among the surrounding bones of the skull. Petrous bone surgery involves a surgical site with complex anatomy. The temporal bone contributes to the lower lateral walls of the skull. The temporal bone is situated on the sides and the base of the cranium and lateral to the temporal lobe of the cerebrum.
The first is the mastoid process, an inferior projection of bone, palpable just behind the ear. Forming the front, upper part of the temporal bone, the squama is thin, translucent, and described as scalelike. Axial a and coronal b contrastenhanced t1weighted mr imaging of the temporal bone in a patient with acute onset of left facial paralysis and a clinical diagnosis of bells palsy. Skull 22 inner surface of middle cranial fossa 12 temporal bone. Introduction temporal bone is a composite structure consisting of tympanic bone, mastoid process, squama and petrosa. How to read a temporal bone ct temporal bone made ridiculously simple a systematic axial approach thank each one of you for making it happen. Learn temporal bone with free interactive flashcards. Downloadable 3d virtual models of the human temporal bone. Petrous apex fractures tend to involve the iac and cochlea, explaining the higher prevalence of cn vii and viii dysfunction than with nonpetrous apex fractures fig. Ct evaluation of the temporal bone ossicles by using. The flattened squamous part forms the superior region of the bone that helps protect the sides of.
In this article, we shall look at the different parts of the temporal bone, their articulations, and any. Temporal bone anatomy this presentation was prepared by hugh curtin, md. An atlas article pdf available in neuroradiology 4310. Locate and describe the parts of the temporal bone. The pinna attaches to the lateral surface of the temporal bone and opens up into the external auditory canal eac, which is an sshaped tube that has a cartilaginous and osseous component.
It is composed of squamous portion laterally and petrous portion medially separated by petrosquamous korners septum. Learn temporal bones anatomy with free interactive flashcards. Imaging of temporal bone trauma geisel school of medicine. The flattened squamous part forms the superior region of the bone that helps protect the sides of the brain temporal lobe. For this purpose, dry skulls with intact ossicles were scanned in axial and coronal projections. The squama forms the anterior and upper part of the bone, and is. Abnormal enhancement of the facial nerve is apparent in the labyrinthine small arrow, geniculate open arrow, and tympanic double arrow portions of the. The base is fused with the internal surfaces of the squama and mastoid portion.
The relationship of the temporal bone structures is very complex and can be difficult for otologic surgeons to master. After description of indications for imaging and the crosssectional imaging anatomy of the area, subsequent chapters address the. This gallery of images presents the anatomy of the temporal bone by means of ctscan reconstructions. Ct is the imaging modality of choice for most of the pathologic conditions of the temporal bone, especially for those of the middle ear. It is anatomically divided into four regions called the squamous, mastoid, temporal, and petrous parts. Sections parallel to the hard palate direct coronal plane patient head extended in prone or supine with 105 degree plane is perpendicular to the lateral scc sections are parallel to posterior wall of maxillary sinus. Beginning with an introduction to surface anatomy and instruments used in temporal bone surgery, this concise guide describes common operations with emphasis on procedures, anatomy and surgical objectives. Temporal bone fractures were historically divided into three main categories, longitudinal, in which the vertical axis of the fracture paralleled the petrous ridge, horizontal, in which the axis of the fracture was perpendicular to the petrous ridge, and oblique, a mixed type with both longitudinal and horizontal components. The primary purpose of temporal bone drilling is to learn temporal bone anatomy. The temporal bones are a pair of bilateral, symmetrical bones that constitute a large portion of the lateral wall and base of the skull. For this purpose, it is necessary to drill through the mastoid bone see fig. Imaging of the temporal bone has recently been advanced with multidetector ct and highfield mr imaging to the point where radiologists and clinicians must familiarize themselves with anatomy that was previously not resolvable on older generation scanners. They are highly irregular bones with extensive muscular attachments and articulations with surrounding bones.
There are a number of openings and canals in the temporal bone through which structures enter and exit the cranial cavity. In anatomy, each temporal bone is composed of five parts. This extensive fiveday course is designed as a complete temporal bone dissection course for the resident or fellow in training or as an update. This is because novice surgeons worldwide need to know the anatomy and surgery of the human temporal bone by heart before being able to start supervised surgery in patients.
The student of the temporal bone, the resident struggling to master the intricate surgical anatomy of this most crowded and complicated bone in the human body, and the otologic surgeon will find this atlas an invaluable reference work and companion to. Combined surgical approaches temporal craniotomy and mastoidectomy by neurosurgical and otological teams are recommended for meningiomas originating in the temporal bone. It consists of four parts arranged round the external auditory canal and tympanic cavity in such a. The temporal bone is comprised of four distinct osseous segments including tympanic, mastoid, petrous, and squamous. Because computerbased 3d virtual models can be valuable tools for teaching and learning this anatomy, we have developed virtual models of the human temporal bone and made them available as downloadable. Because of its superior contrast resolution, ct was able to demonstrate numerous structures, such as the tympanic membrane, ossicles, and supporting structures, hitherto never or poorly visualized by any other method. The tympanic and descending segments of the fn can be decompressed in the temporal bone lab figure 6a and b. Some structures are discussed in more detail with emphasis on related pathology. The temporal bone is very complex and consists of five parts 1,2 squamous part. This atlas allows you to scroll through ct slices of the temporal bone in four different planes. It shows normal temporal bone anatomy in four imaging planes. The temporal bone, 0s temporale, forms part of the base and the lateral wall of the skull and is situated between the occipital, sphenoidal and parietal bones. A must read for all who interpret temporal bone imaging studies. Categorization of temporal bone fractures should include a descriptor for fracture direction, the presence or absence of labyrinthine involvement, and the segment of temporal bone.
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