lec.4,nose pt&rc
DESCRIPTION
Anatomy for physical Therapy and Respiratory Care under graduate studentsTRANSCRIPT
Anatomy
of
The Nose
Prepared By:
Dr. Kamal Motawei
College of Medicine
Anatomy Dept.
2013-2014
External nose
External nose: neurovascular supply
Nasal cavity The nasal cavity is divided by a septum into two cavities; each has:
• Roof: sphenoid, cribriform plate of ethmoid, frontal, nasal
• Floor: hard palate (palatine process of the maxilla and tr. pr. of palatine bone)
• Lateral Wall: ethmoid, maxilla, lacrimal, palatine, sphenoid, inferior concha.
• Medial Wall: nasal septum
Lateral Wall of the nose
• It shows 3 conchae
• It shows 3 meatuses
& shenoethmoidal
recess
• It receives the
openings of the
paranasal sinuses
and nosolacrimal
duct.
• It shows the agger
nasi
Lateral Wall of the nose
• Bulla
ethmoidalis
• Hiatus
semilunaris
&
infundibulum
Openings in the lateral wall
Medial wall (nasal septum)
• Perpendicular
plate of the
ethmoid &
vomer.
• Septal cartilge
Mucous membrane
• Olfactory mucous
membrane: lines
the roof, the upper
surface of the superior
concha and a
corresponding area on
the nasal septum.
• Modified skin: lines the vestibule.
• Respiratory
mucous
membrane: lines
the rest of the nasal
cavity
Nerve supply
• Olfactory nerve
• Nerves of general
sensation:
– Ophthalmic n: ant. ethm. n.
– Maxillary n: nasal,
nasopalatine & palatine br.
of the pterygopalatine
ganglion.
Vascular supply Arterial supply:
– Sphenopalatine a.: from the
maxill.a.
– Ant. & post. Ethmoidal a. from the
ophthalmic a.
– Lateral nasal and septal
branches from the facial a.
Venous drainage: a rich venous plexus is found under
the mucous membrane which is
drained by veins accompanying
the arteries
Lymph drainage: Vestibule drains into the submandibular L.N.
Rest of the nasal cavity drains into the upper
deep cervical L.N.
Epistaxis
• Bleeding from the nose may be:
• Venous (from the venous plexus)
• or arterial mostly occurs on the anteroinferior part of the septum from the anastomosis between the septal branch of the superior labial br. of the facial artery and the shenopalatine artery in the vestibule.
Paranasal sinuses
• Def.: air-filled cavities in the bones
surrounding the nose.
• Where!: frontal, ethmoid, sphenoid,maxilla
• Why! :resonance of the voice, lightening
the weight of the skull & air conditioning.
• When!: appear after birth (only the maxillary and sphenoid
sinuses appear at birth) and grow with age.
Development with age