Old age: a biological phenomenon is inevitable, universal for all forms of life be it animal, vegetable and human. This starts from birth.
Aging physiology:
4 changes:
alteration of neurotransmitters (poor communication between brain cells),
alteration of cell membranes,
crosslinking of collagen,
Oxidation.
apoptosis (programmed cell death), these changes have consequences:
destruction of the respiratory capacity,
loss of lung function (30% between 40 and 75 years)
neurological damage,
wrinkles
osteoporosis
reduced immunity
declining hormones.
Aging: is all the irreversible adverse changes altering the means by which an organization ensures its balance of biological, psychological, sociological.

Pathological aging:
The musculoskeletal system (bones, muscles, joints):
Bones #: 2 types of cells
osteoblasts (bone building)
osteoclasts (bone destroying)
From 20 years age in a loss of bone mass (about 0.5% per year).


Osteoporosis is related to the decrease in frame protein of bones (causing vertebral compression fractures, fractures of the femoral neck, wrists, …)
# Joints: to destroy due to aging U osteoarthritis causes pain, functional impairments, deformities.
The best prevention is to monitor weight, remedy the problem of bone by physical therapy in relieving or pain (s), replacement of bone (osteoplasty).
# Muscles: there is loss of muscle mass.
The nervous system:
There is a decrease in cerebral performance (difficulty of setting new situation, loss of memory, encoding, delay in the execution of actions, …)


Pathologies: Mental confusion, dementia, (eg Alzheimer’s disease), depression, Parkinson’s disease, rigidity, tremor syndrome shift (48 hours evolving source of 90% of deaths), acute regression syndrome, …
senses:
O Hearing: loss of hearing, presbycusis.
N view: presbyopia, glaucoma (high blood pressure in the eye), cataract, AMD (Macular Degeneration Linked to Age), retinopathy (secondary diabetes).
- Taste does not change with age.
Smell: a little lost with age.
I touch: becoming very important with age and changes a little.
Cardiovascular:
There is risk or onset of hypertension, arteriosclerosis, cardiac arrhythmias, heart failure.
Respiratory:
There is a loss of breathing capacity, risk of chronic bronchitis.
renal Camera:
There are fewer nephrons, the risk of dehydration, drugs are toxic to benefit the body.
Gastrointestinal:
There is a risk of stomach ulcers, decreased pancreatic function.
glandular system:
The thyroid is sensitive to aging (hypothyroidism and hyperthyroidism).
hematopoietic Camera
Appearance of refractory anemia, chronic lymphocytic leukemia (for spontaneous evolution).
Urogenital
In women:
Ménaupose (sterility, stopping hormonal secretions),
No rule,
Flushing,
Depressive state,
Loss of feminization (hair larger and harder)
Osteoporosis,
Dryness of mucous membranes.
In men:
Prostate problem involving dysuria, urinary frequency of,
Adenoma,
Cancer.
Precipitating causes:
Chutes & # Malay (causes may include: seizures, causes cardiac syncope, orthostatic hypotension or external causes unknown).
# Undernutrition.
# Infections (prevention through immunization against tetanus, influenza cons against the pneumococcus).
# Intoxication with alcohol, drugs, other toxic.
# The social environment of the person.

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