Question

where does the upper motor neuron synapse with the lower motor neuron?
○ dorsal root ganglion
○ anterior horn of the spinal cord
○ posterior horn of the spinal cord
○ cerebral cortex

Explanation:

Upper motor neurons originate in the cerebral cortex/brainstem and travel to the spinal cord, where they form synapses with lower motor neurons in the anterior (ventral) horn. The dorsal root ganglion contains sensory neuron cell bodies, the posterior horn processes sensory input, and the cerebral cortex is the origin of upper motor neurons, not the synapse site.

Answer:

Anterior horn of the spinal cord