Anatomy External Nose Flashcards
1
Q
What three things comprise the external nose?
A
- Nasal bone
- Upper Lateral Cartilage
- Lower Lateral Cartilage
2
Q
what muscle is responsible for flaring of the nostrils and compressing nasal cartilages?
A
Nasalis
3
Q
What is the blood supply to the nose a)above the middle turbinate and b)below the middle turbinate
A
Above - Ethmoidal (anterior and posterior) from opthalmic
Below - Sphenopalantine From maxillary
4
Q
What is Littles Area (Kesselbachs plexus)
A
Where all the vessels come together and this is the common site of nosebleeds
5
Q
What is the nerve supply to the nose?
A
- Sensory - V1, V2
- Motor - CN VII
- Autonomic - PSNS - Great petrosal nerve via pteryopalantine plexus (dilates blood vessels so decreased surface for air)
SNS - Deep petrosal nerve (constricts blood to increase area for air)
Both petrosal nerves become the Vidian Nerve
6
Q
Where is the ala?
A
7
Q
Where is the philtrum?
A
8
Q
What is the bit between the nostrils called?
A
Columellar
