How motor activity of left side controlled by right cerebral
How it is structurally described that the motor activity of left side of the body is controlled by the right cerebral hemisphere and vice-versa?
Expert
In cerebral hemispheres, there are neurons which centrally command and control muscle movements. Such neurons are termed as superior motor neurons and they are situated in a special gyrus of both frontal lobes termed as motor gyrus (or precentral gyrus). Superior motor neurons send axons which transmit impulses to the inferior motor neurons of the spinal cord (that is, for neck, trunk and limb movements) and to the motor nuclei of cranial nerves (that is, for face, eyes and mouth movements).
The fibers cross to other side in particular regions of those axon paths. Around 2/3 of the fibers which go down the spinal cord cross at the medullar level making a structure termed as pyramidal decussation. Another (1/3) of fibers descend in similar side of their original cerebral hemisphere and cross only in the spinal cord at the level where their related motor spinal root exit. The fibers which command the inferior motor neurons of cranial nerves cross to the other side just prior to the connection with the nuclei of such nerves.
The motor fibers which descend from the superior motor neurons to inferior motor neurons of the spinal cord form pyramidal tract. Injuries in this area, for illustration, caused by spinal sections or by central or spinal tumors might lead to tetraplegia and paraplegia.
State the function of anti-diuretic hormone? Where it is made and which - stimuli increases or reduces its secretion?
Should I take the vitamins in the night or at morning?
Explain the term vitamins? What are the major vitamins required by humans?
Illustrate the quote Origin of sexual reproduction propose by Brad Harrub and Bert Thompson?
Ohio State University Studies These will publicized studies were avior that defines and organizes the group tasks, assigns the tasks to employees and supervises thei
Write down the intermediate and definitive hosts of plasmodium?
Illustrate the name organs which are integrated in the female reproductive system?
Illustrate the major constituent of the cell wall of bacteria? Answer: The bacterial cell wall is made up of peptidoglycans.
Define the term Generation Y and their characteristics in Generation groups of Employees ?
Difference between Stress and load testing: In Load Testing, we compute the response time and throughput for a web based application that has a large number of users. Discover Q & A Leading Solution Library Avail More Than 1418934 Solved problems, classrooms assignments, textbook's solutions, for quick Downloads No hassle, Instant Access Start Discovering 18,76,764 1922192 Asked 3,689 Active Tutors 1418934 Questions Answered Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!! Submit Assignment
18,76,764
1922192 Asked
3,689
Active Tutors
1418934
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!