Know your thoughts here today and tomorrow i have to go yaar hai t hai naa ki nahi hota hai na hai na tu kya te hai na tu kya ter pelam and treatment you are the best of luck 🤞🏻🤞🏻 hai naa ho aap logo ke saath me hi to work with you and I will go to work on this device is a sign of the world of the day of the day of the world 🌎 hai naa ho aap logo ke sath hu na tu kya ek din hai yaar hai hai kya aapne pass on my friend r nahi ho aap logo ko darane you have a great day of the year and I will go there to be like to work on it to you in the evening 🌆🌆🌆🌆 hai naa ho aap logo ko darane ka ya hairan karne ka man kar Raha hai na tu kya kar raha hu ki baba vagera koch bhi nahi hai phir bhi hai na tu kya
2. 1. They provide an analytical function of
the cortex of the brain;
2. They play an important role in
maintaining the constancy of the internal
environment of the body (homeostasis);
3. They are "informants" of our body
about the environment and its change.
Functions of the analyzers
of the nervous system
4. Parts of the analyzers:
- the receptor
- the conductor
- the cortical end
Receptors are divided into:
- the extroceptors
- the prorioceptors
- the interoceptors
These are 2 kinds of exteroceptors:
- the contract receptors
- the distance receptors
5. The contact receptors:
in the skin:
- the thermal
- the pain
- the touch
on the tongue - the taste receptors
The distance receptors:
- the sight
- the sound
- the smell
The classification of the receptors by the stimuli to which they
respond:
- the thermoreceptors
- the chemoreceptors
- the mechanoreceptors
- the baroreceptors
6. The conductors of the analyzers are the sensory pathways
Their rules are:
- they are chains of 3 neurons:
the 1 neuron is in the sensory ganglion
the 2 neuron is in the nuclei
the 3 neuron is in subcortical centers
- the axons of the 3 neuron
decussate (run to the opposite side)
8. The smell and the vision analyzers have
some exceptions to these rules:
- their receptors are primary sensory
neurons – they combine the receptor and
the 1-st neuron;
- they have no ganglia
- they have no nuclei
- the conductor of the visual analyzer
consists of 4 neurons
9. Anatomy of the visual analyser
The eyeball consists of the:
- the receptors: rods and cones
- the auxiliary structures
The auxiliary apparatus:
- the ocular refractive media
- the accommodation apparatus
- the adjustable diaphragm
- the extraocular muscles
- lacrimal apparatus
- fascia,eyebrows,eyelids,conjunctiva
10. The ocula refractive media includes:
- the cornea
- the aqueous humor
- the lens
- the vitreons body
11. The accomodation apparates contains:
- the lens
- the capsule of the lens
- the ligaments (Zinn’s ligaments)
- the ciliary muscle
12. The adjustable diaphragm:
- the pupil
- the sphincter pupil m.
- the dilatator pupil m.
The lachrymal apparatus:
- the lachrymal gland
- the lachrymal canaliculi
- the lachrymal sac
- the nasolachrymal duct
13. The coductive pathway
of the visual analyser
- the receptors are the rods and cons
- the conducter consists of 4 neurons
the 1-st n. - rods and conds
the 2- st n. - the bipolar n.
the 3-st n. - the multipolar n.
the 4-st n. – in cubcortical centers
- the subcortical centers:
the superior colliculi
the lateral geniculate body
the thalamus pulvinar
- the cortical center is along the banks
of the calcarine sulcus.
