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    Add as FriendAnatomy of nose ppt by Dr Manas

    by: Dr Manas Ranjan Rout

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    1 : Anatomy of the Nose Dr Manas 1
    2 : Development of the Nose At 4th iu week – olfactory placode Olfactory pit 5th iu week – Nasal sac Medial and lateral nasal process Fronto-nasal process Maxillary process 2
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    6 : Para nasal sinuses Maxillary sinus- 7-10 iu weeks Ethmoid sinus – 4th iu mt Frontal sinus – After birth 6
    7 : External nose It is pyramidal in shape Osteocartiladginous framework Bony part –upper 1/3rd Cartilaginous part – lower 2/3rd 7
    8 : Bony part Consists of two nasal bones 8
    9 : Cartilaginous part Upper lateral cartilage (2 no) Lower lateral cartilage (2no) Lesser alar cartilage (2 or more in no) Septal cartilage 9
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    13 : Nasal musculature Procerus Nasalis (transverse and alar part) Levator lebii superioris alaque nasi Dilator naris ( anterior and posterior) Depressor septi 13
    14 : Skin of the nose Over the bone it is freely mobile and over the cartilage it is adherent. 14
    15 : Internal nose Divided in to right and left nasal cavity by septum. Anterior – Outside Posterior – Nasopharynx Cavity divided in to skin lined portion, Vestibule and mucosal lined portion, Nasal cavity proper. 15
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    17 : Vestibule Anterior and inferior part of the nasal cavity Lined by skin Contained sebaceous gland, hair follicle and hair called vibrissae. Limen nasi ( nasal valve) – formed by caudal margin of upper lateral cartilage and medial wall by lower part of the nasal septum and columella. 17
    18 : Nasal cavity proper Consists of Roof Floor Lateral wall Medial wall 18
    19 : Roof Anterior sloping part – Nasal bone Posterior sloping part – Body of the sphenoid Middle horizontal part – Cribriform plate of Ethmoid 19
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    21 : Floor Anterior 3/4th – palatine process of maxilla Posterior 1/4th – Horizontal part of palatine bone. 21
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    23 : Lateral wall Contains 3 turbinates and 3 meati Namely –Superior, middle and inferior turbinates and some times supreme turbinates. Lateral to the each turbinates are the corresponding meatus 23
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    25 : Inferior meatus runs along the entire length of the lateral wall. Nasolacrimal duct open into the anterior part 25
    26 : Middle meatus Uncinate process Bulla ethmoidalis Hiatus semilunaris Ethmoidal infundibulum Maxillary osteom Accessory maxillary opening 26
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    29 : Superior meatus limited to the posterior third of the lateral wall Posterior ethmoidal sinuses open in to it Spheno ethmoidal recess lies above the superior turbinate and receives the opening of the sphenoid sinus. 29
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    31 : Medial wall Nasal septum forms the medial wall 3 parts – Membranous septum, Cartilaginous septum, Bony septum 31
    32 : Membranous septum – Consists of double layer of skin Cartilaginous septum – Quadrilateral cartilage Bony septum – Perpendicular plate of ethmoid, vomer bone. 32
    33 : 33
    34 : Lining membrane of internal nose Vestibule – Skin lining Olfactory region Respiratory region – Pseudo stratified columnar ciliated epithelium 34
    35 : Nerve supply Olfactory nerve Common sensation – Anterior ethmoidal nerve, Spenopalatine ganglion, Infra orbital nerve. Autonomic nerve – Vidian nerve 35
    36 : Blood supply Spheno palatine A Greater palatine A Anterior ethmoidal A Posterior ethmoidal A Superior labial A 36
    37 : Lymphatic drainage External nose and anterior part of nasal cavity –Submandibular node Rest of nasal cavity – Upper jugular node directly or through the retropharyngeal node 37
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