Anatomic.us > Skeletal System > Axial Skeleton Skull

Nasal Bone

There are two Nasal Bones in humans. The term Nasal is derived from Latin word Nasus that means Nose. These are small bones, flat in nature, which reside side by side in the upper middle part of the Face. These bones join to each other medially and form bridge of the Nose. This bridge can be palpated readily. Their shape and size vary in different people which give every individual a different look.

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Nasal Bone

STRUCTURE 

 

Each Nasal Bone is a little rectangular, more oblong in shape. It has four borders: superior, inferior, medial and lateral. It also has two surfaces: inner surface that is concave from side to side. It contains a groove for the passage of the Nasociliary Nerve. Outer surface is concavo convex from top to bottom. It is convex from side to side. Each Nasal Bone have connection with four bones, two from cranium, the Ethmoid and Frontal, and two facial bones, the Maxillary and opposite Nasal Bone.

 

BLOOD SUPPLY 

 

The Nasal Bone is supplied by the Anterior and Posterior Ethmoid Arteries which are the branches of Internal Carotid Artery, and by the Sphenopalatine Artery, a branch of External Carotid Artery.

 

NERVE SUPPLY 

 

The innervation to the Nasal Bone is derived from the Facial Nerve.

 

FUNCTION 

 

The function of the Nasal Septum is to provide protection to the internal delicate structures of the Nose. This bridge provides support to the Nasal cavity and is essential for keeping the airway patent.

 

CLINICAL IMPORTANCE

 

As the Nasal Bone is the most prominent feature of the face, so it is the most common structure of the face to be damaged. The fractures of Nasal Bone lead to the following complications:

  •         Cosmetic deformity
  •         Permanent Nasal deviation
  •         CSF leak
  •         Orbital edema
  •         Nasal blockade which causes compromised Nasal functions.

 


STRUCTURE 

 

Each Nasal Bone is a little rectangular, more oblong in shape. It has four borders: superior, inferior, medial and lateral. It also has two surfaces: inner surface that is concave from side to side. It contains a groove for the passage of the Nasociliary Nerve. Outer surface is concavo convex from top to bottom. It is convex from side to side. Each Nasal Bone have connection with four bones, two from cranium, the Ethmoid and Frontal, and two facial bones, the Maxillary and opposite Nasal Bone.

 

BLOOD SUPPLY 

 

The Nasal Bone is supplied by the Anterior and Posterior Ethmoid Arteries which are the branches of Internal Carotid Artery, and by the Sphenopalatine Artery, a branch of External Carotid Artery.

 

NERVE SUPPLY 

 

The innervation to the Nasal Bone is derived from the Facial Nerve.

 

FUNCTION 

 

The function of the Nasal Septum is to provide protection to the internal delicate structures of the Nose. This bridge provides support to the Nasal cavity and is essential for keeping the airway patent.

 

CLINICAL IMPORTANCE

 

As the Nasal Bone is the most prominent feature of the face, so it is the most common structure of the face to be damaged. The fractures of Nasal Bone lead to the following complications:

  •         Cosmetic deformity
  •         Permanent Nasal deviation
  •         CSF leak
  •         Orbital edema
  •         Nasal blockade which causes compromised Nasal functions.

 

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