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Gross Anatomy
Back Muscles: Superficial
46
Anatomy
Graduate
11/26/2009

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Cards

Term
Trapezius Origin
Definition
Posterior skull, spines of all cervical vertebrae except C7, via the ligamentum nuchae, all thoracic vertebrae, lumbar and sacral spinous processes.
Term
Trapezius Insertion
Definition
Lateral 1/3 of clavicle, acromion and spine of scapula
Term
Trapezius Innervation
Definition
Accessory Nerve C3-4
Term
Trapezius Action
Definition
Elevation, retraction, rotation of scapula
Term
Latissimus Dorsi Origin
Definition
Spinous processes of lower 6 thoracic vert., spinous processes of lumbar and sacral vertebrae via thoracolumbar fascia, ilica crest, and lower 3 or 4 ribs
Term
Latissimus Insertion
Definition
Intertubercular groove
Term
Latissimus Dorsi Innervation
Definition
Thoracodorsal Nerve
Term
Latissimus Dorsi Action
Definition
M.edial rotation, A.dduction, and E.xtension of the arm at the shoulder joint; raises the body toward arms during climbing.
Term
Levator Scapulae Origin
Definition
Transverse processes of C1-4
Term
Levator Scapulae Insertion
Definition
Superior part of medial border of the scapulae.
Term
Levator Scapulae Innervation
Definition
Dorsal Scapular and Cervical nerves
Term
Levator Scapulae Action
Definition
Elevation of the scapula
Term
Rhomboid Minor Origin
Definition
Ligamentum nuchae and spinous processes of C7 and T1 vertebrae
Term
Rhomboid Minor Insertion
Definition
Medial Border of scapula at spine level
Term
Rhomboid Minor Innervation
Definition
Dorsal Scapular nerve
Term
Rhomboid Minor Action
Definition
Adduction of the scapula
Term
Rhomboid Major Origin
Definition
Spinous processes of T2-5 vertebrae
Term
Rhomboid Major Insertion
Definition
medial border of the scapula below spine level
Term
Deltoid Origin
Definition
Lateral 1/3 of the clavicle, acromion, spine of scapula
Term
Deltoid Insertion
Definition
Deltoid tuberosity of humerus
Term
Deltoid innervation
Definition
Axillary Nerve
Term
Deltoid Action
Definition
Flexion, abduction, medial and lateral rotation of the arm.
Term
Supraspinatus Origin
Definition
Supraspinatus fossa of scapula
Term
Supraspinatus Insertion
Definition
Greater tubercle of humerus, superior 1/3
Term
Supraspinatus Innervation
Definition
Suprascapular nerve
Term
Supraspinatus Action
Definition
Aids deltoid in abducting arm
Term
Infraspinatus Origin
Definition
Infraspinatus fossa of Scapula
Term
Infraspinatus Insertion
Definition
Greater tubercle of humerus, middle 1/3
Term
Infraspinatus Innervation
Definition
Suprascapular Nerve
Term
Infraspinatus Action
Definition
Laterally rotate the arm
Term
Teres Minor Origin
Definition
Lateral margin of infraspinatus fossa
Term
Teres Minor Insertion
Definition
Greater tubercle of humerus, middle 1/3
Term
Teres Minor Innervation
Definition
Axillary N.
Term
Teres Minor Action
Definition
Laterally rotate the arm
Term
Subscapularis Origin
Definition
Subscapular fossa
Term
Subscapularis Insertion
Definition
Lesser tubercle of humerus
Term
Subscapularis Innervation
Definition
Upper and Lower subscapular nerves
Term
Subscapularis Action
Definition
Medial rotation and adduction of the arm
Term
Teres Major Origin
Definition
Dorsal surface of inferior angle of scapula
Term
Teres Major Insertion
Definition
Medial lip of intertubercular groove of humerus
Term
Teres Major Innervation
Definition
Lower subscapular
Term
Teres Major Action
Definition
Adducts and medially rotates the arm
Term
Splenius Origin
Definition
Arises from ligamentum nuchae and spinous processes of C7-T3
Term
Splenius Capitis Insertion
Definition
fibers run superolaterally to mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone
Term
Splenius cervicis
Definition
tubercles of transverse processes of C1-4
Term
Splenius Innervation
Definition
dorsal rami of spinal nerves
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