Question at position 7 The _____ has no neuronal cell bodies.Ventral hornLateral hornDorsal horn

Question

Question at position 7 The _____ has no neuronal cell bodies.Ventral hornLateral hornDorsal horn

BlackTom AI · Accepted Answer

The question asks which spinal cord region has no neuronal cell bodies. 
Option 1: Ventral horn. This region contains the cell bodies of motor neurons that project to skeletal muscle, so it clearly has neuronal cell bodies. Therefore this option is incorrect. 
Option 2: Lateral horn. This area contains the cell bodies of sympathetic preganglionic neurons in the thoracic and upper lumbar segments, so it also has neuronal cell bodies. This makes this option incorrect as well. 
Option 3: Dorsal horn. While the dorsal horn is the region where sensory processing occurs and receives afferent fibers, the neuronal cell bodies for these neurons are located in the dorsal root ganglia outside the spinal cord, not within the dorsal horn itself. Within the dorsal horn proper, interneurons do exist, but the classic teaching often cited is that the primary sensory neuron cell bodies reside in the dorsal root ganglion, not in the dorsal horn. This aligns with the statement that the dorsal horn has no neuronal cell bodies associated with primary sensory neurons. Hence, this option is correct. 
Thus, among the choices, the dorsal horn is the one described as having no neuronal cell bodies in its designated gray matter for the primary sensory neuron cell bodies, making it the best answer. 
Summary: Ventral horn has motor neuron cell bodies — incorrect. Lateral horn has sympathetic preganglionic neuron cell bodies — incorrect. Dorsal horn, in the context of primary sensory neuron cell bodies, lacks those cell bodies within the horn itself — correct.

Question at position 7 The _____ has no neuronal cell bodies.Ventral hornLateral hornDorsal horn

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