Median Nasal Septum

Anatomy of Medial Nasal Septum

1. Median Nasal Septum V.S.RASHMI PRIYEM

2. MEDIAL WALL OF NASAL CAVITY THE NASAL SEPTUM IS A MEDIAN OSSEOCARTILAGINOUS PARTITION BETWEEN THE TWO NASAL CAVITIES. SELDOM EXACTLY IN THE MEDIAN PLANE BUT BULGES TO ONE OR THE OTHER SIDE, MORE FREQUENTLY TO THE RIGHT. THE BONY PART IS FORMED BY : (A) PERPENDICULAR PLATE OF ETHMOID, WHICH FORMS THE POSTEROSUPERIOR PART OF THE SEPTUM (B) VOMER, WHICH FORMS THE POSTEROINFERIOR PART OF THE SEPTUM

3. CARTILAGINOUS SEPTUM THE CARTILAGINOUS PART IS FORMED BY : (A) SEPTAL CARTILAGE, FITS IN THE ANGLE BETWEEN THE VOMER AND PERPENDICULAR PLATE OF ETHMOID (B) SEPTAL PROCESSES OF THE TWO MAJOR ALAR CARTILAGES.

4. COLUMELLA THE SEPTAL PROCESSES (MEDIAL CRURA) OF TWO MAJOR ALAR CARTILAGES ARE UNITED TOGETHER IN THE MIDLINE BY A FIBROUS TISSUE TO FORM COLUMELLA ALSO CALLED COLUMELLAR SEPTUM

5. MEMBRANOUS SEPTUM BETWEEN THE COLUMELLA AND CAUDAL BORDER OF THE SEPTAL CARTILAGE. A SMALL PORTION OF SEPTUM IS MADE UP OF DOUBLE LAYER OF THE SKIN . WITH NO BONY OR CARTILAGINOUS SUPPORT. THIS PART IS REFERRED TO AS MEMBRANOUS SEPTUM. BOTH COLUMELLAR AND MEMBRANOUS PARTS ARE FREELY MOVABLE FROM SIDE-TO-SIDE.

6. ARTERIAL SUPPLY OF NASAL SEPTUM 1. SEPTAL BRANCH OF THE ANTERIOR ETHMOIDAL ARTERY A BRANCH OF OPHTHALMIC ARTERY 2. SEPTAL BRANCH OF THE POSTERIOR ETHMOIDAL ARTERY A BRANCH OF OPHTHALMIC ARTERY 3. SEPTAL BRANCH OF THE SPHENOPALATINE ARTERY A BRANCH OF MAXILLARY ARTERY 4. SEPTAL BRANCH OF THE GREATER PALATINE ARTERY A BRANCH OF MAXILLARY ARTERY 5. SEPTAL BRANCH OF THE SUPERIOR LABIAL ARTERY A BRANCH OF FACIAL ARTERY

7. Nerve supply of nasal septum 1. OLFACTORY NERVES SUPPLY THE UPPER PART JUST BELOW THE CRIBRIFORM PLATE. 2. INTERNAL NASAL BRANCH OF ANTERIOR ETHMOIDAL NERVE, A BRANCH FROM NASOCILIARY SUPPLIES THE ANTEROSUPERIOR PART. 3. NASOPALATINE NERVE, A BRANCH OF PTERYGOPALATINE GANGLION SUPPLIES THE POSTEROINFERIOR PART. 4. MEDIAL POSTERIOR SUPERIOR NASAL BRANCHES OF PTERYGOPALATINE GANGLION SUPPLY THE POSTEROSUPERIOR PART. 5. NASAL BRANCH OF GREATER PALATINE NERVE SUPPLIES THE POSTERIOR PART. 6. ANTERIOR SUPERIOR ALVEOLAR NERVE, A BRANCH OF MAXILLARY NERVE SUPPLIES THE ANTEROINFERIOR PART.