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Nasal and Temporal Region Tony Serino, Ph.D. Clinical Anatomy Superficial Muscles Nasalis Zygomaticus Levator labii superioris Nasal Cartilages Lateral cartilage Sesamoid cartilage Septal cartilage Alar cartilage Nostril Nasal Cavity Frontal Sinus Vestibule Auditory Tube Yellow rods indicate openings to paranasal sinuses Paranasal Sinuses Ethmoid Frontal Sphenoid Maxillary Conchae & Nasal Septum Superior concha Middle concha Inferior concha Perpendicular plate Septal cart. Nasal Septum Vomer Nasal Crest Arterial Supply to Nose Ant. ethmoid a., branch of ophthalmic a. Sphenopalatine a., branch of maxillary Kiesselbach area Nasal Innervation Except for Olfactory area, served by CN V, V1 above dotted line V2 below Olfaction Sense Olfaction Signal Transduction Temporal Region Facial n. Parotid Parotid duct G. Auricular n. Ext. Jugular Facial a. Ext. Acoustic Meatus Parotid Region Styloid Process IJV Accessory n. Vagus n. Int. Carotid Glossopharyngeal n Ext. Carotid Hypoglossal n. SCM TMJ Mandibular fossa TMJ articular disc Mandibular condyle (head) Lateral Pterygoid m. Sound Frequency vs. Loudness Frequency measured in hertz (Hz) Loudness measured in decibels (dB) Anatomy of the Ear Helix Lobe Tragus Middle and Inner Ear Umbo Malleolar Prominence IV I Arm III II Core of Light Ossicles Amplify Sound Loud Sound Protection Cochlea and Cochlear Duct Frequency Perception • Different frequency (pitch) of sound stimulates different areas of cochlear duct • The overall area stimulated relates to the sound intensity Vestibular Apparatus Macula of Utricle and Saccule Otoconia (otoliths) Ampulla Anatomy