What is one of the key symptoms of Central Nervous System Syndrome at initial exposure?

The initial exposure to Central Nervous System Syndrome often manifests through neurological symptoms, one of which is vision loss. This symptom can arise due to the impact of radiation or toxic substances on the nervous system, leading to various visual disturbances. Vision loss can include blurred vision, difficulty focusing, or even partial or complete blindness depending on the severity of the exposure and the extent of damage incurred.

Other symptoms, while they might seem relevant, do not specifically align with the initial indicators typically associated with Central Nervous System Syndrome. For instance, diarrhea and loss of appetite are more commonly seen in gastrointestinal syndromes following exposure to certain toxins or radiation; they are not primary symptoms of CNS involvement. Likewise, memory loss, though a critical symptom of more chronic or advanced stages of neurological damage, is not a prominent initial symptom following exposure. In summary, vision loss stands out as a key early symptom indicative of Central Nervous System Syndrome.