Are Ultrasonographic Measures of Cervical Flexor Muscles Correlated With Flexion Endurance in Chronic Neck Pain and Asymptomatic Participants?.

Objective: This study compared the relationship between some clinical factors and the size of neck flexors in participants with or without chronic neck pain. Design: In this case-control study, the correlation between flexor endurance capacity as well as thickness, cross-section area, and shape ratio of longus colli/capitis and sternocleidomastoid muscles were examined in 30 patients with chronic neck pain and 30 asymptomatic participants. Results: The patients showed lower flexor endurance (P = 0.02), smaller thickness (P = 0.03), and cross-section area (P

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