2. OLFACTORY SYSTEM
ADD QUALITY OF LIFE
PERCEPTION OF ODOUR DEPEND ON
ANATOMICAL STATE OF NASAL EPITHELIUM
STATUS OF PERIPHERAL AND CENTRAL NERVOUS
SYSTEM
FOR OLFACTION CRANIAL NERVES 1,5,9,10 ARE
INVOLVED
4. AMOUNT OF AIR FLOW
50% AIR FLOW THROUGH MIDDLE MEATUS
35% AIR FLOW THROUGH INFERIOR MEATUS
15% AIRFLOW THROUGH OLFACTORY CLEFT
5. MUCOSAL LAYER OF OLFACTORY
EPITHELIUM
PRODUCED BY BOWMAN’S GLANDS DEEP IN
LAMINA PROPRIA AND RESPIRATORY GOBLET
CELLS
NECESSARY FOR CONCENTRATION OF ODORANT
SUBSTANCES
FOR SUBSTANCE TO PRODUCE ODOUR IT MUST
BE LIPID SOLUBLE AND VOLATILE
6. OLFACTORY EPITHELIUM
LOCATION-POSTEROSUPERIOR PART OF NOSE
AREA OF OLFACTORY EPITHELIUM-5 SQ.CM
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
4 TYPES OF CELLS-CILIATED OLFACTORY
RECEPTOR,MICROVILLI CELLS,SUSTENTACULAR
CELLS,BASAL CELLS
8. OLFACTORY PATHWAY
CILIATED OLFACTORY RECEPTORAXONS CONDENSE
TO
FORM OLFACTORY NERVE10-15 FORAMINA IN
CRIBRIFORM PLATE
OF ETHMOID CONVERGE ON MITRAL CELLS OF
GLOMERULI IN OLFACTORY BULBOLFACTORY TRACT
PASS CROSSING OPTIC NERVEAND OPTIC CHIASMA
END IN PYRIFORM CORTEX
.