Among the listed options, which would NOT be a common symptom of spinal shock?

Spinal shock is a clinical syndrome that occurs following a spinal cord injury and is characterized by a temporary loss of neurological function below the injury level. Among the symptoms typically associated with spinal shock are bradycardia, decreased reflexes, and muscle weakness.

Bradycardia, or a slowed heart rate, can arise due to disruption of autonomic pathways, which are affected in spinal shock. Decreased reflexes are also a hallmark of spinal shock, indicating a lack of neural activity below the level of the injury. Muscle weakness results from the impaired neurological signals that do not reach the muscles due to the spinal cord injury.

Diarrhea, on the other hand, is not a common symptom of spinal shock. It may arise from other causes or conditions but isn't directly linked to the spinal cord injury itself. This makes it the option that does not fit with the typical presentation of spinal shock symptoms.