Bones And Features Of The Lateral Wall Of The Nose Explained

Bones And Features Of The Lateral Wall Of The Nose Explained

Describe bone formation, features, opening, blood supply & nerve supply of lateral wall of nose (or) Lateral wall of nasal cavity. (or) Openings related to Lateral Wall of Nasal Cavity.
Answer:

Lateral wall of nose:

Lateral Wall of Nasal Cavity Bone formation:

• It is formed by following bones
• Nasal bone
• Frontal process of maxilla
• Lacrimal bone
  • Labyrinth of ethamoid with superior & middle conchae
  • Inferior nasal concha
  • Perpendicular plate of palatine bone
  • Medial pterygoid plate

Lateral Wall of Nasal Cavity Features:

• Bony wall is covered by mucous membrane & projects as three nasal conchae

1. Inferior nasal concha
   • It is separate bone, present horizontally
2. Middle concha
   • It is part of ethmoid labyrinth
3. Superior concha
   • It is smallest concha situated just above the posterior part of middle concha
   • The meatuses of the nose are passages beneath the overhariging conchae
   • There are three meatuses
     1. Inferior meatus
        • Lies underneath the inferior concha
     2. Middle meatus
        • Lies beneath middle concha
        • It presents
          1. Ethamoidal bulla
          2. Hiatus semilunaris
          3. Infundibulum
     3. Superior meatus
        • Present below superior concha
        • Area above superior concha is called sphenoethamoidal recess

Lateral Wall of Nasal Cavity Openings:

Lateral Wall of Nasal Cavity Blood supply & nerve supply:

Nerve supply:

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

Venous drainage:

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