Some neurons enable you to grasp objects by relaying outgoing messages to the muscles in your arms and hands. these neurons are called:

The correct answer is known as a "motor neuron".

A motor neuron or also known as a motoneuron is described as  a neuron whose cell body is placed inside the motor cortex, brainstem or the spinal cord, and whose axon initiatives to the spinal cord or the exterior of the spinal cord to immediately or not directly manage effector organs, specifically muscle mass and glands. 

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