the

Olfactory Pathway - Nerve and Tracts

in this video we will discuss the

olfactory nerve or factory nerve or the

cranial nerve one is associated with the

sense of smell and starts from the nose

and ends into the primary and the

secondary olfactory cortex so this is a

section of the nose which also shows the

sinuses this is the frontal sinus this

is the sphenoidal sinus this is the

palate and above lies the cribriform

plate so the olfactory pathway begins

with the olfactory

rootlets now these olfactory reutlitz

are their nasal and have the olfactory

cells which pick up the smell and they

continue posteriorly as the olfactory

nerves the olfactory nerves pass through

the perforations in the cribriform plate

and they enter into the olfactory bulb

your factory bulb lies on the superior

part of the cribriform plate the

olfactory nerves enter the olfactory

bulb and hear the synapse with the

mitral and the tufted cells and the

processes of the mitral and the tufted

cells continue posteriorly as the

olfactory tract and this olfactory tract

continues posteriorly and enters into

the primary and the secondary olfactory

cortex so let's look at the section of a

brain to understand the central portion

of the olfactory pathway on the top

right corner of the screen you will see

a diagram of the brain and if we cut the

brain at this point and look at it from

below upwards this is the current

section that I am drawing here so this

is the olfactory bulb and the rest of

the portion that I am drawing here is

the rest of your factory pathway so here

are the olfactory reutlitz which enter

into the olfactory bulb and the

olfactory bulb sends the olfactory tract

which continuous posteriorly so this is

the olfactory tract the areas you are

seeing here are the medial or factorize

trial the lateral olfactories trial and

area just posterior to them is the

anterior perforated substance and this

area here forms the primary olfactory

cortex and the primary olfactory cortex

is associated with the active perception

of sense of smell these neurons continue

posteriorly and they enter into a area

known as the internal area and the area

just medial to it is the Uncas and these

two areas form the secondary or factory

cortex the secondary or factory cortex

is associated with functions like memory

and emotions associated with the sense

of smell so this was a short description

of the olfactory nerve and your factory

pathway also if you want to see more

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