Stroke Brain haemorrhage:
“Stroke is a rapidly developed clinical sign of focal disturbances of
cerebral function lasting more than 24 hours or leading to death”. (WHO)
Inspite of the presence of factors inhibiting the coagulation of blood
within vessels, clotting may occur at times. Such clots frequently are formed
in veins than in arteries.
The blood clot or thrombus formed in the streaming
blood is called thrombosis. A clot in the cerebral vessel is called stroke or
cerebral thrombosis. Stroke may be caused due to vascular occlusion, which
is a blockage in the cerebral artery. The occlusion and stroke lead to
infarction. The infarction leads to abnormal symptoms in the brain.
Vascular occlusion is of two types viz., Thrombotic and embolic. An
embolus is a portion of the thrombus clot that becomes detached and enters
into circulating blood. An embolus may block the circulation to vital parts
leading to serious consequences.
Brain haemorrhage:
Haemorrhage or bleeding of brain vessels may be
caused by hypertension which results in bursting of blood vessels or due to
aneurysm wherein the arterial wall bulges and forms a sac like structure and
ruptures later. The stroke and the haemorrhage are also due to vascular
malformations.
Stroke causes both physical; and mental crippling. It is a worldwide
health problem. It can occur at any age. Several risk factors may lead to
stroke and brain haemorrhage. They are cardiac abnormalities, diabetes,
elevated blood lipids, hypertension, obesity, smoking and stenosis (narrowing
of valvular orifice), etc.
One can control stroke by controlling the above risk factors.
Related Topics in Zoology:
Bio Zoology All Important Topics
- Human Physiology Introduction
- Nutrition
- Carbohydrates Poly hydroxyaldehydes (or) ketones
- Proteins (Polypeptides)
- Lipids
- Vitamins – Functions Of Vitamins
- Deficiency of Vitamin
- Minerals – Water – Role of water
- Balanced diet
- Obesity
- Digestive System
- Dental Caries (Tooth decay)
- Root Canal Treatment
- Peptic ulcer
- Hernia and Types
- Appendicitis (Appendix)
- Gall Stones
- Hepatitis
- Fractures – Types of fractures
- Mechanism of fracture
- Dislocation of joints
- Arthiritis
- Rickets and Osteomalacia – Orthopedics
- Muscles
- Mechanism of muscle contraction
- Types of muscle contraction
- Myasthenia Gravis
- Respiration – Process of pulmonary respiration
- Mechanism of Breathing
- Regulation of Respiration
- Pneumonia Tuberculosis Symptoms Treatment
- Bronchitis – Acute bronchitis, Chronic Bronchitis Causes
- Circulatory System – Functioning of Human heart
- Cardiac Cycle
- Coronary blood vessel and its significance
- Myocardial infarction
- Angina pectoris
- Angiogram – Angioplasty
- Atherosclerosis
- Heart block Echo cardiography Heart Valves
- Rheumatic Heart Disease (RHD), ICCU – (Intensive Coronary Care Unit)
- Blood Pressure
- Heart transplantation
- Pulse rate
- Cardio Pulmonary Resuscitation (CPR)
- Blood – Composition of plasma – Blood cells
- Clotting of Blood or Haemostasis
- Thrombosis
- Nervous system Co-ordination systems
- The Brain – Fore Brain, Midbrain, Hindbrain
- Memory
- Sleep – Types of sleep
- Stroke – Brain haemorrhage
- Alzheimer – Meningitis (Brain fever)
- Conditioned reflex
- Electroencephalography EEG
- Right and Left brain concept
- Spinal cord functioning
- Chemical co-ordination – Functions of Endocrine glands
- Hypothalamus
- Pituitary gland – hormone
- Hormones of Neurohypophysis – vasopressin
- Thyroid gland
- Parathyroid Gland
- Pancreas
- Adrenal gland
- Gonads
- Receptor Organs – Eye
- Photochemistry of Retinal visual Pigments
- Errors of refraction
- Optometry – Retinopathy
- Cataract – Lens Replacement – Glaucoma – Nyctalopia
- Eye Infections and Eye Care
- Ear
- Mechanism of hearing
- Defects of the ear
- Hearing Aid – Noise pollution
- Skin and functions of skin
- Melanin functions
- Effects of solar radiation / UV radiation – Skin grafting
- Dermatitis
- Tongue – Mechanism of Stimulation
- Excretion Ureotelism Nephron
- Mechanism of urine formation
- Renal Failure, Dialysis, Kidney Machines
- Kidney stone – Kidney transplantation
- Diabetes mellitus
- Functioning of male reproductive system
- Functioning of female reproductive system
- Ovulation and fate of the ovum – Menstrual cycle
- Fertilization
- Birth control