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

4. 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.

5. 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

6. 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.

7. 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

9. 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.