The Skull and Its Landmarks (DTH23 Part A) PDF
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Uploaded by WiseTropicalIsland4758
London South Bank University
Julie Watson
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Summary
This document explains the ethmoid bone, a part of the human skull. It describes the bone's structure and location, and explains how the ethmoid bone is involved in smell and vision. It discusses the medical relevance of the ethmoid bone in cases of fractures or inflammation.
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The Skull and its Landmarks Part 3 of 5 moid Bone Julie Watson /Middle r Belue , The Cranium – The Ethmoid Bone Ethmoid Bone g Loading… O Image from Wikipedia 3 Image from Human Anatomy Originates from the Greek word Ethmos meaning sieve. This relates to the lightweight and spongy structure Is a small unpaired bone that forms part of the orbital complex Copper wheat, 2020) 4 Image from Science Direct log 8 cranium bones Location of the Ethmoid Bone The Ethmoid bone is situated in the paranasal sinuses Contributes to the medial wall of Loading… the orbit and forms part of the anterior cranial fossa Separates inferior to the nasal cavity and superiorly from the cranial cavity Innervation: Anterior and Posterior Ethmoidal Branches. · nasal septum , roof+ lateral wall of nose floor ofanterior to Yu, 2020).. Small contribution cranial fossa 5 · mesial wall of orbial cavity Image from TeachmeAnatomy Features of the Ethmoid Bone – Made up of 4 parts Cribriform plate 1x Perpendicular plate IX Ethmoid labyrinths 2x 6 Copper wheat, Cribriform Plate This forms the roof of the nasal cavity. It is perforated - by numerous olfactory nerves fibres. The crista galli projects superiorly from the cribriform plate 7 Perpendicular Plate Forms the superior two thirds of the nasal septum and descends from the cribriform plate. Thin , quadrilateral plate of bone Descends vertically in midline Septum cartilage. 8 Ethmoid Labyrinths Large masses located either side of perpendicular plate and contain Ethmoid air cells (which are the Ethmoid sinuses) S lateral masses Bulk of ethmoid bone. fluid gited this wall cavities into Anterior middletposterior clusters arranged , 9 Warming + moisten of inspired air-voice resonance frequent nose blowing can cause bleeding Clinical Relevance noth Fracture of cribriform plate may cause anosmia loss of smell. - cronny Inflammation can cause Rhinorrhoea – cerebral spinal Ethmoid labyrinth fracture may fluid can enter the nasal cavity allow communication between and drains out as a clear watery the nasal cavity and orbit and fluid from one side of the nose natural - cause orbital emphysema cross over of - Coughing, - Inflammation can cause Rhino fruids Damage to the Ethmoid bone Sneezel , sinusitis may be caused by infection, blowing, nose inflammation or facial trauma. dental infections Yu, Copper wheat, 2020 2020 You Tube Clip for this section https://www.youtube.com/watch?v=wwtW4tvGuSc (Ethmoid Bone) Loading… 11 Have a breather, get some fresh air! End of Part 3 12 Creativefabrica.com
