Nasal Septum Anatomy: Bones, Cartilage, And Nerve Supply

Nasal Septum Anatomy: Bones, Cartilage, And Nerve Supply

Question 1. Describe the lateral wall of Nasal Cavity under following headings:

1. Parts
2. Openings
3. Blood supply
4. Nerve supply

Answer:

Nasal Cavity Parts:

• Lateral wall of nasal cavity is divided into three parts
  • Anterior part- vestibule
  • Middle part- atrium of the middle meatus
  • Posterior part-containing conchae

Nasal Cavity Openings:

Nasal Cavity Nerve supply:

• General sensory nerves are from trigeminal nerve
• Special sensory nerves are olfactory nerves

Nasal Cavity Venous drainage:

• Anteriorly drains into facial vein
• Middle part drains into pterygoid plexus of veins
• Posteriorly drains into pharyngeal plexus

Question 2. Nasal septum
Answer:

Nasal septum Formation:

• It is partly formed by bone & partly by cartilage

1. Bony part:

• • • It is formed by
      1. Perpendicular plate of ethmoid
      2. Vomer
      3. Accessory bones like
         1. Nasal spine of frontal bone
         2. Sphenoidal crest & rostrum
         3. Palatine processes of maxillae & horizontal parts of palatine bone

2. Cartilages are formed by:

• Septal cartilage
• Septal process of lower nasal cartilage
• Vomeronasal cartilage
• General sensory nerves arises from trigeminal nerve
• Special sensory nerves are olfactory nerves which are confined to the upper part of olfactory area