NBCE Exam 2026 – 400 Free Practice Questions to Pass the National Board of Chiropractic Examiners

The contribution of segmental facilitation to pain and hypersensitivity in the medial forearm is primarily associated with the C6-C7 vertebrae. This area is relevant because the C6 and C7 spinal nerves give rise to the nerves that innervate the forearm region, particularly the medial aspect, which includes sensory input from the skin and muscular control.

The C6 nerve root is primarily associated with the lateral forearm and the thumb, while the C7 nerve root contributes more prominently to the middle finger and the medial forearm. This area, particularly the distribution from C6-C7, aligns with the clinical presentation of pain and hypersensitivity, often termed "radicular pain," where irritation or dysfunction at these spinal levels leads to symptoms along their respective nerve pathways.

The other vertebral levels mentioned do not correlate as directly with pain in the medial forearm. C4-C5 is more connected with shoulder and upper arm sensations, while C5-C6 involvement typically affects the lateral forearm and shoulder area. C7-T1 involvement primarily affects the hand and is less connected to forearm symptoms specifically. Thus, the correct association with C6-C7 highlights the segmentally facilitated pathways leading to the discomfort described.