Question

A patient comes to you with complaints of muscle weakness, muscle spasms, and twitches in the left arm. He does not have loss of sensation, pain, tingling, or numbness. The nerve conduction test and EMG test have abnormal results. Which structure is most likely the location of the problem: SENSORY NEURONS, MOTOR NEURONS, BRAIN, OR SPINAL CORD?

Explain your choice

Answer 1

Motor neurons because if he doesn’t feel the following, he must lost control of his arm

Answer 2

MOTOR NEURONS

Step-by-step explanation:

"Motor Neurons" are a group of cells designated to transmit impulses that allow the body to move. The impulses travel from the central nervous system (CNS) towards a specific muscle within the body.

The patient above shows an abnormal result in his Electromyography (EMG) test. This means that he has a problem with the transmission of impulses from the nerve to the muscle. It is a sign that there could be something wrong with the nerve cells that control the muscles or the muscles themselves. So this means that the motor neurons could most likely be the structure which has a problem. The symptoms above of muscle weakness, muscle spasms and twitches in the left arm could be signs that his motor neurons are not being able to effectively send signal to the muscles. It could be an onset of a Motor Neuron Disease.