Shoulder
Back
Abdomen
Deep
Superficial
100
Action: Laterally rotates and adducts arm at the shoulder; helps stabilize the shoulder Origin: Medial part of lateral border of scapula Insertion: Inferior aspect of greater tubercle of humerus
Teres Minor
100
A group of muscles that act upon the back, including the: Iliocostalis Cervicis, Iliocostalis Thoracis, Iliocostalis Lumborum, Longissimus Capitis, Longissimus Cervicis, Longissimus Thoracis, Spinalis Cervicis, and Spinalis Thoracis
Erector Spinae
100
Action: Connects all of your abdominals and keeps the abdominal wall together Origin: Pubis bone and the xiphoid process of the sternum Insertion: Pubis
Linea Alba
100
Action: extends and hyperextends the cervical (neck) portion of vertebral column. Origin: lower ligamentum nuchae; spinous process of C6 or C7 Insertion: Spinous processes of axis
Spinalis Cervicis
100
Action:flexes arm, extends arm and rotates and adducts arm Origin: Clavicular head; sternal head; upper cartilages (ribs 1-6) Insertion: crest of greater tubercle of humerus
Pectoralis Major
200
Action: Retracts and elevates the medial border of the scapula while downwardly rotating the lateral angle Origin: Spinous process of T2-T5 vertebrae Insertion: Medial border of scapula inferior to the spine
Rhomboid Major
200
Action: Lateral flexion and rotation of the spine Origin: Illium Insertion: Upper 4 lumbar vertebrae and the twelfth ribs (false ribs)
Quadratus Lumborum
200
Action: Flexion and rotation of the lumbaric region of the spine Origin: Ribs and Illium Insertion: Illium and Pubis
External Obliques
200
Action: Draws the scapula forward and downward Origin: Anterior surfaces of the sternal ends of ribs 3-5 Insertion: Coracoid process of scapula
Pectoralis Minor
200
Action: Abducts, rotates, and stabilizes scapula Origin: Anterior surface of first 8 ribs Insertion: Anterior surface of medial border of scapula
Serratus Anterior
300
Action: Upper fibers: elevate and rotate scapula upward and extend neck Middle fibers: adduct/retract scapula Lower fibers: depress scapula Origin: Spinous processes of C7 and T1-T3 Insertion: Lateral clavicle and the acromion and spine of the scapula
What is the Trapezius?
300
Action: Extension, adduction, and rotation of the shoulder joint Origin: Illium, ribs, thoracic/lumbaric regions of the spine and the sacrum Insertion: Humerus
Latissimus Dorsi
300
Action: Flexes vertebral column and compresses abdomen Origin: pubic crest and symphysis pubis Insertion: costal cartilages of ribs 5-7; xiphois process of sternum Main Muscle of the Abdomen
Rectus Abdominis
300
Action: extension, flexion, and rotation of head and neck Origin: from C3-T3 Insertion: Superior nuchal line of occipital bone and mastoid process of temporal bone
Splenius Captis
300
Big muscle on back Action: Extension, adduction, and rotation of the shoulder joint Origin: Illium, ribs, thoracic/lumbaric regions of the spine and the sacrum Insertion: Humerus
Latissmus Dorsi
400
Retracts and elevates the medial border of scapula and downwardly rotates the lateral angle. Origin is the spinous process of the C7-T1 vertebrae. Insertion is the medial border of the scapula.
Rhomboid Minor
400
Action: Flexes and laterally rotates thigh at hip; flexes vertebral column Origin: Bodies and bases of transverse processes of L1-L5
Psoas Major
400
Action- Flexes and rotates vertebral column Origin- Anterior Illiac crest, lateral half of inguinal ligament, thoracolumbar fascia Insertion- Costal Cartilages of ribs 8-12; abdominal aponeurosis to linea alba
Internal Obliques
400
Action: Bilateral: Extends and hyperextends the head Unilateral: Laterally flexes and rotates the head to the same side Origin: Transverse process of T1-T5; articular processes of C4 or C5-C7 Insertion: Posterior portion of the mastoid process of the temporal bone
Longissimus Capitis
400
Position: Superficial to internal intercostals Action: Helps with breathing Origin: Inferior border of rib Insertion: Superior border of rib
External Intercostals
500
Action: Extends, abducts, and rotates the shoulder Origin: Scapula Insertion: Humerus
Infraspinatis
500
Action: Bilateral: Extends and hyperextends the head Unilateral: Laterally flexes and rotates the head to the same side Origin: Transverse process of T1-T5; articular processes of C4 or C5-C7 Insertion: Posterior portion of the mastoid process of the temporal bone
Longissimus Capitis
500
Action: Compresses abdomen Origin: Anterior iliac crest, lateral half of inguinal ligament, thoracolumbar fascia, & cartilage of ribs 6-12 Insertion: Abdominal aponeurosis to linea alba, xiphoid process, & pubic symphysis
Transversus Abdominus
500
Action: Extends and laterally flexes lower vertebral column Origin: Medial and lateral sacral crests; medial iliac crest Insertion: Angles of ribs 6-12
Iliocostalis Lumborum
500
Action: Flexion and rotation of the lumbaric region of the spine Origin: Ribs and Illium Insertion: Illium and Pubis
External Obliques
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