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Spine Anatomy

Upper Traps-Serratus Anterior

QuestionAnswer
Upper Trap PA External occipital protuberance, medial third of superior nuchal line, nuchal ligament.
Upper Trap DA Lateral third of clavicle and acromion
Upper Trap N CN XI: Spinal accessory nerve and VR C3, C4
Upper Trap A Elevates, adducts, and upwardly rotates scapula
Middle Trap PA SP T1-5
Middle Trap DA Medial margin of acromion and superior lip of spine of scapula
Middle Trap N CN XI: Spinal accessory nerve and VR C3, C4.
Middle Trap A Adducts the Scapula
Lower Trap PA SP T6-T12
Lower Trap DA Tubercle at apex of spine of scapula
Lower Trap N CN XI: Spinal accesory nerve and VR C3, C4
Lower Trap A Depresses, adducts, upwardly rotates scapula
Latissimus Dorsi PA SP T7-T12, thoracolumbar fascia, iliac crest, and inferior 4 ribs
Latissimus Dorsi DA Floor of intertubercular groove of humerus
Latissimus Dorsi N Thoracodorsal n. (C6, C7)
Latissimus Dorsi A Extends, adducts, and internally rotates humerus.
Rhomboid Major and Minor PA Major: SP T2-5, Minor: Nuchal ligament and SP C7, T1
Rhomboid Major and Minor DA Medial border of scapula from level of spine to inferior angle
Rhomboid Major and Minor N Dorsal Scapular n. (C5)
Rhomboid Major and Minor A Adducts, elevates, and downwardly rotates scapula.
Levator Scapulae PA TP C1-4
Levator Scapulae DA Superior part of medial border of scapula
Levator Scapulae N Dorsal scapular n. (C5)
Levator Scapulae A Elevates and downwardly rotats scapula
Teres Major PA Dorsal surface of inferior angle of scapula
Teres Major DA Medial lip of intertubercular groove of humerus
Teres Major N Lower subscapular n. (C6)
Teres Major A Extends, adducts, and internally rotates humerus
Supraspinatus PA Supraspinous fossa of scapula
Supraspinatus DA Superior facet of greater tubercle of humerus
Supraspinatus N Suprascapular n. (C5)
Supraspinatus A Abducts humerus; depresses and compresses humeral head in glenoid.
Infraspinatus PA Infraspinous fossa of scapula.
Infraspinatus DA Middle facet of greater tubercle of humerus
Infraspinatus N Suprascapular n. (C5)
Infraspinatus A Externally rotates humerus; depresses and compresses humeral head in glenoid.
Teres Minor PA Middle part of lateral border of scapula
Teres Minor DA Inferior facet of greater tubercle of humerus
Teres Minor N Axillary n. (C5)
Teres Minor A Externally rotates humerus; depresses and compresses humeral head in glenoid.
Subscapularis PA Subscapular fossa
Subscapularis DA Lesser tubercle of humerus
Subscapularis N Upper and lower subscapular n.'s (C6)
Subscapularis A Internally rotates humerus; depresses and compresses humeral head in glenoid.
Pectoralis Major PA Clavicular head: medial half of clavicle. Sternocostal head: sternum, superior 6 costal cartilages, and aponeurosis of external oblique muscle
Pectoralis Major DA Lateral lip of intertubercular groove of humerus
Pectoralis Major N Lateral and medial pectoral n.s (C6, C7, C8)
Pectoralis Major A Adducts and internally rotates humerus.
Pectoralis Minor PA 3rd to 5th ribs near their costal cartilages
Pectoralis Minor DA Coracoid process of scapula
Pectoralis Minor N Medial pectoral n. (C8, T1)
Pectoralis Minor A Stabilizes scapula by drawing it inferiorly and anteriorly against the thoracic wall
Serratus Anterior PA External surfaces of lateral parts of 1st to 8th ribs.
Serratus Anterior DA Anterior surfaces of medial border of scapula
Serratus Anterior N Long thoracic n. (C6-C7)
Serratus Anterior A Abducts and upwardly rotates scapula; stabilizes the medial border of the scapula against thoracic wall.
Created by: txst spr 2009 on 2009-02-22



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