Talk:Levator scapulae muscle
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Sweet! Original research! edit
"When both shoulders are fixed, a simultaneous co-contraction of both levator scapulae muscles in equal amounts would not produce lateral flexion or rotation, and may produce straight flexion or extension of the cervical spine. Which would happen is unknown."
I believe what is attempting to be communicated is that co-contraction puts the vertebrae under compression; they will tend to buckle in either the flexion or extension direction, as determined by other unmentioned muscles. So a more accurate phrasing would be that "With the shoulders fixed, co-contraction aids in the flexion or extension of the cervical spine." Whether such details need to be in here at all I cannot imagine. — Preceding unsigned comment added by 172.5.154.148 (talk) 15:14, 6 January 2015 (UTC)