Which would NOT be considered a "lesion"?

Which would NOT be considered a "lesion"?

• A. An exaggerated somato-autonomic reflex
• B. A skeletal muscle unresponsive to electrical stimulation
• C. Fixation of a spinal segment
• D. Inability to sense a pin prick

Answer: (A)

In chiropractic terms, a lesion is a localized disturbance in the structure or function of a tissue or joint—something you could point to as a specific site of abnormality, such as a spinal segment, muscle, or nerve pathway. An exaggerated somato-autonomic reflex is a widespread reflex response mediated by the autonomic nervous system. It’s a systemic functional change, not a localized structural disturbance. The other options describe clear tissue- or nerve-level issues that fit the idea of a lesion: a muscle not responding to electrical stimulation suggests a problem in the muscle or its innervation; fixation of a spinal segment is a definite structural abnormality; and an inability to sense a pinprick indicates a sensory pathway deficit. Therefore, the exaggerated somato-autonomic reflex is not considered a lesion, making it the best choice.

In chiropractic terms, a lesion is a localized disturbance in the structure or function of a tissue or joint—something you could point to as a specific site of abnormality, such as a spinal segment, muscle, or nerve pathway.

An exaggerated somato-autonomic reflex is a widespread reflex response mediated by the autonomic nervous system. It’s a systemic functional change, not a localized structural disturbance. The other options describe clear tissue- or nerve-level issues that fit the idea of a lesion: a muscle not responding to electrical stimulation suggests a problem in the muscle or its innervation; fixation of a spinal segment is a definite structural abnormality; and an inability to sense a pinprick indicates a sensory pathway deficit. Therefore, the exaggerated somato-autonomic reflex is not considered a lesion, making it the best choice.