![]() Beyond this regional common thread, CN imaging encompasses complex anatomical and technical considerations that need to be known for clinical practice.ĬN disorders are caused by a wide spectrum of diseases and imaging plays a major role in the etiological inquiry and the therapeutic planning. MRI is the modality of choice to investigate CN disorderĬT is useful to depict calcification and skull lesionĬranial nerves (CN) are 12 pairs of symmetrical nerves that apparently originate from the cerebrum (I, II) and the brainstem (III–XII). Master CN anatomy including nucleus, apparent origin, route, and target Painful CN disorder may reveal aneurysm and dissectionīe aware of clinical history, presentation, and biological tests for imaging interpretation Skull base lesions usually cause unilateral unique or multiple CN disorders.Įxtracranial lesions may cause unilateral unique or multiple CN disorders with craniocervical objective lesions. Intraaxial lesions usually cause multiple CN disorders in association with CNS dysfunctionsĮxtraaxial intracranial lesions may cause unique or multiple CN disorders with meningeal syndrome and intracranial hypertension To understand that different lesions can be found on the different anatomical segments of the cranial nerves (intraaxial, extraaxial intracranial, extracranial) and that dedicated imaging techniques are needed to investigate these different segments and various pathologies Pocket Atlas of Human Anatomy: 5th edition - W.To know the imaging appearance of the most frequent cranial nerve lesions and be aware of associated CN disorders.Terminologia anatomica: international anatomical terminology By the Federative Committee on Anatomical Terminology (FCAT).State of the art: 3T imaging of the membranous labyrinth. Lane JI, Witte RJ, Bolster B, Bernstein MA, Johnson K, Morris J.The inner ear imaging anatomy with 3T MRI new sequences: A comprehensive update ECR 2014 Poster C-2316 - E.Detailed MR imaging anatomy of the cisternal segments of the glossopharyngeal, vagus, and spinal accessory nerves in the posterior fossa: the use of 3D balanced fast-field echo MR imaging. (Neuroradiologist, ENT imaging specialist, Montpellier – France) for her help and medical advice, essential for the creation of this module. ![]() The authors would like to thank Sophie Menjot de Champfleur M.D. (Radiologist, Montpellier – France), using the Terminologia Anatomica 2 and the Terminologia Neuroanatomica. The anatomical labeling has been performed by Antoine Micheau M.D. Samuel Merigeaud (Tridilogy - Montpellier, France). The 3D images of the inner ear (cochlea, semicircular canals and vestibule) and the facial and vestibulocochlear nerves were created using the MRI native images on VG Studio Max by the Dr. The images were then cropped to focus on the right temporal bone and cerebellopontine angle. MRI images were post-treated with Horos to obtain MPR reconstructions in two different oblique-sagittal planes (a series perpendicular to the internal auditory canal and a series in the axis of the anterior semicircular canal). (Radiologist, Montpellier – France).įorty four images of the posterior fossa were obtained, with 0.6 mm thickness. This neuroanatomy atlas of cerebellopontine angle and temporal bone has been designed to help radiologists in their daily practice (MRI of vestibular schwannoma, hearing loss, audiovestibular syndromes…) with annotated MR reconstructions in the essential planes (axial and two oblique-sagittal planes), spatial orientation and color-text legend.Ī T2 3D CISS (constructive interference in steady state) sequence of the inner ear has been performed on a healthy 35 year old female patient on a 1.5T Siemens Magnetom Sola by Antoine Micheau M.D. This anatomical module of e-Anatomy is dedicated to the anatomy of the inner ear (cochlea, bony and membranous labyrinth) and the normal MRI appearance of the facial and vestibulocochlear nerves in the internal acoustic meatus on high resolution T2 images of the posterior fossa.
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