Which statement characterizes SDF as described?

Which statement characterizes SDF as described?

• A. Damage to the nervous system
• B. Decreased reflexes
• C. Loss of segmental motion
• D. Loss of nerve flow

Answer: (C)

The main idea is that SDF is defined by a loss of motion at a specific spinal segment. This reflects a mechanical dysfunction between two adjacent vertebrae, which is what practitioners assess through palpation and aim to restore with adjustment. Loss of segmental motion indicates the segment is not moving properly, a hallmark of this concept. The other statements describe neural or vascular aspects (damage to the nervous system, decreased reflexes, loss of nerve flow)—factors that may accompany spinal issues but do not define SDF in this context. The focus here is on the mechanical restriction between segments, not on neural damage or blood/nerve conduction.

The main idea is that SDF is defined by a loss of motion at a specific spinal segment. This reflects a mechanical dysfunction between two adjacent vertebrae, which is what practitioners assess through palpation and aim to restore with adjustment. Loss of segmental motion indicates the segment is not moving properly, a hallmark of this concept.

The other statements describe neural or vascular aspects (damage to the nervous system, decreased reflexes, loss of nerve flow)—factors that may accompany spinal issues but do not define SDF in this context. The focus here is on the mechanical restriction between segments, not on neural damage or blood/nerve conduction.