Muscles Connecting The Upper Limb To The Vertibral Column Assignment Help

MUSCLE ORIGIN INSEDTION NERVE SUPPLY NERVE ROOTS ACTION
Trapezius Occipital bone, ligamentum nuchae, C7 spine and all thoracic vertibra Upper fibres into lateral third of clavicle, middle & lower into acromion and spine of scapula Spinal part of accessory nerve XI cranial nerve Upper fibers elevates scapula;middle fibers pulls scapula medially;lower fibers pull medial border of scapula down
Latissimus dorsi Iliac crest, lumber facia,spine of lower six thoracic vertibra Floor of bicipital groove of humerus Thocacodorsal nerve C6,7,8 Extends, adducts, and medially rotates the arm
Levator scapulae Transverse process of first four cervical vertebrae Medial border of scapula C3 & 4 and dorsal scapular nerve C3,4,5 Raise medial border of scapula
Rhomboid minor Ligamentum nuchae & spines of 7th Cervicle & 1st thoracic Medial border of scapula Dorsal scapular nerve C4,5 Raise medial border of scapula upward and medially
Rhomboid major 2nd to 5th thoracic spines Medial border of scapula Dorsal scapular nerve C4,5 Rais emedial border of scapula upward and medially
Deltoid Lateral third of clavicle, acromion,spine of scapula Middle of lateral surface of shaft of humerus Axillary nerve C5,6 Abducts arm; flex and medially rotates arm; extends & laterally rotates arm
Supraspinatus Supraspinus fossa of scapula Greater tuberocity of humerus Suprascapular nerve C4,5,6 Abducts arm and stabilizes shoulder joint
Infraspinatus Infraspinus fossa of scapula Greater tuberosity of humerus Suprascapular nerve C4,5,6 Laterally rotes arm and stabilizes shoulder joint
Teres major Lower third of lateral border of scapula Medial lip of bicipital groove of humerus Lower subscapular nerve C6,7 Medially rotates and adducts arm
Teres major Upper two thirds of lateral border of scapula Greater tuberosity of humerus Axillary nerve C4,5,6 Laterally rotates arm & stabilizes shoulder
Subscapularis Subscapular fossa Lesser tuberosity of humerus Upper & lower subscapular nerves C5,6,7 Medially rotates arm & stabilizes shoulder joints

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