University:
Camosun College
Course:
NURS132 | Promoting Health and Wellbeing
Academic year:

2023
Views:

436

Pages:

3
Author:

Aysha A

FUNCTION OF OLFACTORY NERVE AIM: So devonstrate the function of olfactory nerve.. REQUIREMENTS: Oil of cloves, Alcohol. DISCUSSION:- Sense of smell is poorly developed in mon as compared to lower animale, such as dags etc. who are called macrosomatic. In there animale ercell is very highly developed. It has surunka value in searching for food and animals; it is also involved in other instinctual behavioura OLFACTORY MUCOUS MEMBRANE: The olfactory mucous membrane is located in the roof of the nasal cavity near the reptum. The 10-20 million sensory receptor celle are actually bipolar nervous originally derive from content nervous system. They are scattered among the supporting and baral cells. The dendritic ends of the cells are expanded to forre olfactory rate that contain cilia and vescicle Unlike other neurons these sensory cells are constantly replaced. Unlike primary colors or primary tastes, there are no known primary odours though 7 such odours dre described - peppermint, comphoreous, floral ethereal rusky pungent and putrid. OLFACTORY ADAPTATION:- Also called olfactory fatigue; the factory sensation decreases with continued exposure to o odorant it occurs within seconds of minuter depending on the nature of the odorant. PATHWAY FOR SMELL The axons from the senedy cells pierce the cribriform plate of ethroid bone and enter the alfactory bulb. Here they synapse on the dendrites of mitral colle to form glomerule. The axons of ritral celle which are the main output neurone in the bulb, form the olfactory tract as it enters the brain, it divides into two parts: one part passing to lateral olfactory cortes and part of arrygdala aut thence to hippocarepus. This cocuit connects with the lateral feeding area of hypotharmacus and is involved in initiating eating behaviour. ABNORMALITIES: Anorria refers to complete absence of smell. Pareria refers to alterations of snell sensations. Hyposrria is decreased sense of smell. PROCEDURE: 1. dek the subject to close his eyes, and occlude one of his norbule. Then have him sre and distinguish the odours of each of the test substances, one by one, in each nostril seperately. 112. Ask him to occlude one nostril, and have him smell the oil of cloves until the odour con no longer be detected. Immediately after this ark the subject to try to distinguish. with the adapted nostrile, between turpentine an alcohol. Describe the result in your practical workbook... REPORT: After perferring the expourment, the functions of olfactory nerves are found to be normal by demonetrating and testing different types of odours and reported.