![]() Some of the branches will synapse with local neurons in the dorsal root ganglion, posterior (dorsal) horn, or even the anterior (ventral) horn, at the level of the spinal cord where they enter. The dorsal root contains only the axons of sensory neurons, whereas the ventral roots contain only the axons of the motor neurons. ![]() As the spinal nerve nears the spinal cord, it splits into dorsal and ventral roots. Generally, spinal nerves contain afferent axons from sensory receptors in the periphery, such as from the skin, mixed with efferent axons travelling to the muscles or other effector organs. Describe several reflex arcs and their functional roles.Explain the initiation of movement from the neurological connections.Compare different descending pathways, both by structure and function.Describe the pathway of descending motor commands from the cortex to the skeletal muscles.List the components of the basic processing stream for the motor system.Explain topographical representations of sensory information in at least two systems.Describe the pathway of somatosensory input from the face and compare it to the ascending pathways in the spinal cord.Differentiate between the two major ascending pathways in the spinal cord.Describe the pathways that sensory systems follow into the central nervous system.By the end of this section, you will be able to:
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