Which of the following would NOT be considered a neurological symptom?

Myalgia, defined as muscle pain or discomfort, is primarily a musculoskeletal symptom rather than a neurological one. It typically arises from issues related to muscles, tendons, ligaments, or other parts of the musculoskeletal system and does not directly relate to the nervous system's functions or disorders.

In contrast, both focal weakness and loss of consciousness (LOC) are clear indicators of possible neurological issues. Focal weakness could suggest a localized neurological problem such as a stroke or a lesion affecting specific brain regions. Loss of consciousness can indicate severe neurological events, such as seizures or other complications impacting brain function.

A tumor, while it can also present with various symptoms depending on its location and whether it is affecting the nervous system, is inherently associated with the neurological system as it can directly involve brain tissue, spinal cord, or other areas associated with neurological function. Thus, myalgia stands out as not being a neurological symptom.