Left and right cerebral hemisphere
How it is structurally described that the motor activity of left side of the body is controlled by right cerebral hemisphere and motor activity of right side of the body is generally controlled by the left cerebral hemisphere?
Expert
In the cerebral hemispheres, there exist neurons which centrally command and control the movements of the muscle. These neurons are known as the superior motor neurons and they are situated in special gyrus of both the frontal lobes called as motor gyrus or precentral gyrus. The superior motor neurons send axons which transmit some impulses to inferior motor neurons of the spinal cord and to the motor nuclei of the cranial. The fibers cross to another side in the specific areas of those axon paths. Around 2/3 of fibers which go down the spinal cord cross at the medullar level forming the structure called as the pyramidal decussation. Another (1/3) of fibers decreases in the same side of their original cerebral hemisphere and cross only in the spinal cord at level where their linked motor spinal root exit. The fibers which command the inferior motor neurons of cranial nerves cross to another side just before the connection with the nuclei of these nerves.The motor fibers which descend from the superior motor neurons upto the inferior motor neurons of spinal cord form the pyramidal tract. Injuries in this tract, such as, caused due to spinal sections or by the central or spinal tumors generally lead to tetraplegia and paraplegia.
Specify the valve which divides the right ventricle from the pulmonary artery? Why that particular valve is so important?
Describe several signs and symptoms found in patients with hyperthyroidism?
What do you mean by the neurotransmitter of neuromuscular junction? Explain, how the nervous system triggers the muscle contraction?
Specify the location of salivary glands in humans?
Write down the two big groups into which the cells are categorized?
Is the phase when an insect larva is in a cocoon a phase of total biological inactivity? Answer: The period whenever the larva is in its cocoon is a time of intense
Groups may be classified into different types. The basis of differentiation may be purpose, extent of structuring, process of formation, and size of the group membership. 1) Primary and secondary groups: primary groups are those characterized by in
How amino acids brought to cellular site where translation occurs? And also give a brief explanation of anticodon.
There is no denying the fact theta they would economy is becoming global in character barriers to trade between different countries have been reduced to a great extent. India which is also a member of the world trade organization (WTO) has also removed most of the barriers 10 trade which has pave
Line organization structure or military organization A line organization is one in which all managers have direct authority over their respective subordinates, throu
18,76,764
1928762 Asked
3,689
Active Tutors
1437158
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!