NERVOUS SYSTEM
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Transcript of NERVOUS SYSTEM
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NERVOUS SYSTEM
KONTAXAKIS ANTONIOS (27336)
TRIANTAFILLOU EVANGELIA FEDRA
(27363)
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INTRODUCTION
Coordination of our body system is achieved through our nervous system, a long leap forward in a millions of years evolution battle.
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Cellular level
The nervous system is based on the interconnection of neurons, each sending and receiving nerve impulses.
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Receptors
Stimuli are received through special mechanisms, receptor organs such as chemo-or thermoreceptor. (Meissner’s tactile or end buld of Krause)
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SENSORY ORGANS
Our sensory organs are: the ear the eye the nose(nasal passages) the tongue skin&hairs&nails
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1. Ear: an organ for hearing and balance
2. Eye: an organ of sight.
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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.
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Pathway till command centres
Peripheral nervous system is then assigned to carry info till our brain or spinal cord.
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Command Centres
Brain interneurons and spinal cord reflex arcs are assigned to decode stimuli value and decide action.
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Reflex
Reflexes offerfast reactionwithoutimmediatebrainparticipation.
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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
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The Brain
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Action
Motor neurons carry the final command till the neuroglandular or neuromuscular junction where action takes place.
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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.
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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
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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
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