Question

What is the correct order of hierarchy of motor control, from precommand level to motor output?...

What is the correct order of hierarchy of motor control, from precommand level to motor output?

A. somatic motor neurons, spinal cord, brain stem nuclei, motor cortex, basal nuclei and cerebellum

B. motor cortex, brain stem nuclei, somatic motor neurons

C. cerebellum, brain stem nuclei, spinal cord, somatic motor neurons

D. cerebellum and basal nuclei, motor cortex, brain stem nuclei, spinal cord, somatic motor neurons

Science   Anatomy-And-Physiology   
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Answer #1

correct answer is option D.

the motor activity starts when the central nervous system receives the stimuli by sensory system.

The coordination and control of motor activities start from cerebral cortex. Cortical areas send their output signal to spinal cord via corticospinal tarct and to brain stem via corticotubular tract.

The cerebellum and basal ganglia plays an important role in planning, programming and coordination of skilled movements. These then send signals to motor cortex.

From motor cortex , the signal are sent to spinal cord and brainstem which eventually sends signal to effector organ via motor nerve.

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