Transcript NERVOUS SYSTEM - Aristotle University of Thessaloniki

NERVOUS SYSTEM
KONTAXAKIS ANTONIOS (27336)
TRIANTAFILLOU EVANGELIA FEDRA
(27363)
INTRODUCTION

Coordination of our body system is
achieved through our nervous system, a
long leap forward in a millions of years
evolution battle.
Cellular level

The nervous
system is based
on the
interconnection
of neurons, each
sending and
receiving nerve
impulses.
Receptors

Stimuli are
received through
special
mechanisms,
receptor organs
such as chemo-or
thermoreceptor.
(Meissner’s tactile
or end buld of
Krause)
SENSORY ORGANS
Our sensory organs are:
 the ear
 the eye
 the nose(nasal passages)
 the tongue
 skin&hairs&nails
1. Ear: an organ for hearing
and balance
2. Eye: an organ of sight.
3.The tongue:a strong
muscle at the floor of the
mouth that is covered by the
lingual membrane. It is the
organ of taste.
4.Skin:It consists of 3 layers: a)the epidermis b) the
dermis c) the subcutis.
The nails are a form of skin and it is formed by keratin.
5.The nose(nasal
passages): an organ of
smell.
Pathway till command centres

Peripheral
nervous system
is then
assigned to
carry info till our
brain or spinal
cord.
Command Centres

Brain
interneurons
and spinal cord
reflex arcs are
assigned to
decode stimuli
value and
decide action.
Reflex
Reflexes offer
fast reaction
without
immediate
brain
participation.
Brain parts

Our brain comprises of
– the cerebrum responsible for most of brain
information processing
– the brain stem dealing with involuntary
functions of vital importance
– the cerebellum offering balance and
equilibrium as well as memory of repetitive
acts
The Brain
Action

Motor neurons
carry the final
command till the
neuroglandular or
neuromuscular
junction where
action takes
place.
Diseases of nervous system

Epilepsy: a disorder in which nerve cells of the
brain, from time to time, release abnormal electrical
impulses.


Brain tumors
Lyme disease: a bacterial illness that is
transmitted to humans by the bite of deer tick.
What can we do to maintain a healthy nervous
system?
•Well balanced diet
• Regular exercise
•Stress management
•Pharmacist’s Supplement Recommendation
Vitamins and Minerals

Antioxidants

Essential Fatty Acids

Amino Acids

Herbs and Phytonutrients

Strengths and weaknesses
+


rapid and effective
info processing
culture
–
–
–
–

language
science
ethics
adaptability
conciousness
-




Pain
inability to renew
drug addiction
certain spectrum of
sound+radiation
frequency