If a stroke on the one side of the brain affects the opposite side , its effect can be termed as sensory impairment .
Sensory impairment is the defect or dis-functioning of sensory organs.
it is a common term used to describe deafness , blindness , visual impairment , hearing impairment , deaf-blindness .
Brain:
It is the most complicated and highly specialized organ of the body .
An adult human brain weighs about 1400gms .
In a new born baby , the brain is 400gms and becomes double after one year .
It has a volume of 1500c.c.
It is enclosed by bony case called cranium which protects the brain against external injury .
The brain is surrounded by three membranes called meninges .the meninges are outer duramater , middle arachnoid layer and inner piamater .
The brain or encephalon is a white , bilaterally symmetrical structure . it is divided into three parts : fore brain , mid brain , and hind brain .
The brain is formed of two types of nervous tissue : grey matter on the outer side and white matter on the inner side .
The space between duramater and arachnoid is the subdural space . the space between arachanoid and piamater is known as subarachnoid space .
Cerebrospinal fluid is also present within the spinal cord .
It protects the central nervous system from external shock .
It helps in exchange of nutrients and waste products between the nervous tissue and blood .
It maintains a constant pressure in and around the brain .
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