Trapezius (Lower Fibers)

ExRx.net > Kinesiology > Directory > Muscle

Translate

Other Names Back (Middle) Lower Traps Heads Lower Fibers (1 of 3) Also see Upper Fibers Middle Fibers Movement Scapula Upper Rotation Adduction Depression Spine (Thoracic) (weak) Extension Attachments Origin Spine Thoracic Vertebrae (T4-12) Spinous Processes Insertion Scapula Spine (Inferior Medial) Triangular Space at Base Related Muscles Rhomboids

Comments Lower trapezius is important for shoulder function due to its mobility and posturing of scapula. Lower trapezius activity is typically relatively low at angles less than 90° of scapular abduction, abduction, and flexion, and then increases exponentially from 90° to 180°. Exercises that result in greater lower trapezius to upper trapezius ratio included shoulder external rotation at 0° abduction and prone horizontal abduction at 90° abduction with shoulder externally rotated (McCabe RA et al, 2007; Cools AM et al, 2003).