lesion to which structure of the brain causes poliomyilitis?
a) cerebral cortex.
b) basal ganglia.
c) ventral horn neurons.
d) pyramidal tract/ extra pyramidal tract.
e) a&b
The correct answer is:
c) ventral horn neurons.
Poliomyelitis, also known as polio, is caused by a viral infection that specifically targets and damages the ventral horn neurons in the spinal cord. These neurons are responsible for controlling muscle movement, and their destruction results in paralysis and muscle weakness.
The correct answer is c) ventral horn neurons.
Explanation:
Poliomyelitis, commonly known as polio, is a viral infection caused by the poliovirus. It primarily affects the spinal cord and peripheral nerves, leading to muscle weakness and paralysis.
To understand this, it is important to know the basic anatomy of the brain and spinal cord. The spinal cord can be divided into different regions, including the dorsal horn, ventral horn, and lateral horn.
The ventral horn is responsible for coordinating motor commands to the muscles. It contains motor neurons called ventral horn neurons, which transmit signals from the brain to the muscles, controlling muscle movement. These neurons are essential for normal motor function.
When the poliovirus infects the ventral horn neurons, it damages or destroys them, leading to muscle weakness or paralysis. As a result, the affected individuals may experience muscle atrophy, loss of reflexes, and difficulty in movement.
In summary, a lesion to the ventral horn neurons of the spinal cord would be the cause of poliomyelitis, resulting in muscle weakness and paralysis. Therefore, the correct answer to the question is c) ventral horn neurons.
The correct answer is c) ventral horn neurons.
Poliomyelitis, commonly known as polio, is a viral infection that primarily affects the nervous system. It is caused by the poliovirus. Specifically, polio affects the ventral horn neurons in the spinal cord, which are responsible for transmitting signals from the brain to the muscles. Damage to the ventral horn neurons can lead to muscle weakness, paralysis, and other symptoms associated with poliomyelitis. Thus, a lesion to the ventral horn neurons of the spinal cord is responsible for causing poliomyelitis.