PMF is useful during physical exam because the vertebral spines can be palpated and counted in the groove. These muscles flank the vertebral column the more developed the muscles, the deeper the PMF. PMF is most visible in those with robust para-spinal (erector spinae) muscles. It tends to be shallow in the cervical region, diminishes over the sacrum and is continuous with the gluteal cleft (Aye, the sweet cheeks! ). The posterior median furrow (PMF) literally means “back middle groove.” This vertical depression is most visible in thoracic and lumbar regions of the back. Get in the groove and Learn about Jamie’s back furrow by reading Anatomy Lesson #10, Jamie’s Back! Outlander Def: Deep, lovely groove of Jamie’s back! Anatomy Def: M idline vertical depression in the surface of the back (red arrows).
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