Middle and lower fibers: Phasic (weakens when stressed)
Symptoms
Upper fibers
Headache over the eye, into eye, or into the temporal area
Stiff neck
Pain with light pressure, such as wearing a bra, backpack over shoulders etc.
Middle fibers
Burning pain between scapula and vertebras
'Goosebumps' on lateral surface of upper arm
Possible causes for tension
Postural asymmetries caused by pelvic tilt or rotation of the trunk
Muscle attachment zones
Videos
Short version
Detailed version
Important functions
Works to maintain the head in neutral position if there are structural compensation patterns in other parts of the body. Such as deviations in the pelvis, trunk or feet, which again would cause a lateral tilt of head if not corrected.
Plays an important role in movement and stabilization of the Scapula for initiating movement of the shoulder-joint
