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29 terms

Rotator cuff and back muscles

Bony landmarks, origin, insertion and action.
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Sternoclavicular joint
The joint which attaches the sternum to the clavicle
Acromioclavicular joint
The joint which connects the acormion process to the clavicle
Glenohumeral joint
The ball and socket joint which connects the glenoid cavity to the humerus
Infraspinious, supraspinus and subscapular fossa
The (3) scapular fossae contain these three muscles.
Supraspinatus
Muscle that abducts the shoulder at the glenohumeral joint and stabalizes the head of the humerus in the glenoid cavity.
Attachments for the Supraspinatus
Supraspinious fossa of the scapula and the greater tubercle of the humerus.
Infraspinatus/Teres Minor
Muscle that Laterally rotates the shoulder at the glenohumeral joint. Also adducts, extends and stabilizes the shoulder.
Attachments for the Infraspinatus
Infraspinous fossa of the scapula and the greater tubercle of the humerus
Greater Tubercle of the Humerus
The common attachment site for Supraspinatus, Infraspinatus, and teres minor
Attachments for the subscapularis
Subscapular fossa of the scapula and the lesser tubericle of the humerus
Attachments for the Deltoid
Deltoid Tuberosity and the lateral 1/3rd of the clavicle acromion and spine of the scapula
What is the common action of all fibers of the deltoid?
Abduct the shoulder
Attatchment of the Trapezius
Attatches to the Occiput, ligamentum nuchae and the spinous process c7-T12, lateral 1/3rd of the clavicle, acromion and spine of the scapula
nickname for teres major
Lat's little helper.
Attachments for Lat. dorsi
Originates at the Spinous process of the last six thorasic vertebrate, last 3-4 ribs, thoracolumbar aponeurosis and posterior iliac crest and inserts at the crest of the lesser tubercle of the humerus
Action for Lat. dorsi and Teres Major
Muscle that extends, adducts and medially rotates the shoulder at the glenohumeral joint
Attachments for Teres Major
Attaches at the lateral side of the inferior angle and lover half of the lateral border of the scapula. Inserts at the crest of the lesser tubercle of the humerus
Attachments for Rhomboids major and minor
Spinus process for C7-T5 to the medial border of the scapula between the sine of the scapula and the inferior angle
Attachments for the Levator Scapula
Transverse processes of the first thru fourth cervicle vertebrate and the upper medial border and superior angle of the scapula
Action for the Rhomboids
Adduct, elevate and downwardly rotate the scapula
Actions of the Levator Scapula
Unilaterally elevate, downwardly rotate the scapula and laterally flex the head and neck, rotate the neck to the same side
Three Muscles that make up the Erector Spinae group
Longissimus, iliocostalis, and spinalis
Actions of the Erector Spinae group
Laterally flex the vertebral column to the same side and extend the vertebral column
The common tendon for the Erector spinae group
thoracolumbar aponeurosis
Attachments for the Longissimus and illiocostalis
Attaches to the posterior surface of the sacrum, iliac crest, spinous processes of the lumbar and last two thoracic vertebrate then inserts at various attachments at the posterior ribs, spinous and transverse process of the thoracic and cervical vertebrate, mastoid and temporal bone.
Actions of the Quadratus Lumborum
Laterally tilts the pelvis, laterally flexes the vertebral column to the same side. Note also also fixes the last rib during inhalation and forced exhalation
Atachment for the Quadratus Lumborum
Posterior Iliac Crest and the last rib and transverse process of the first thru fourth lumbar vertebrate
Three muscles of the Transversospinalis Group
Multifidi, rotatores, semispinalis capitis
Multifidi, rotatores and semispinalis capitis
the deepest erectors in the lamina grove that rotate the vertebral column to the appropriate side.