Capri October class - Dav.

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Muscle

Origin

Insertion

Action

Nerve

Errector Spinae

Medial - Spinalis Middle - Longissimus Lateral - Iliocostalis

Extension and Lateral Flexion of the spine

Spinal

Quadratus Lumborum

Posterior Iliac Crest

Transverse Process L1-4 and the 12th Rib

Lateral flexion to the same side

Branches of the T12-L1

Trapezius

Occiput C7-T12 Spinous Processes

Lateral 1/3 clavicle acromion processes and spine to the root of the spine

elevation upward rotation retraction depression

accessory

Rhomboids Minor

C7-T1 Spinous Processes

Root of the spine of the scapula

retraction of the scapula

dorsal scapula

Rhomboids Major

T2-5 Spinous Processes

Vertebral Border from the root of the spine to the inferior angle

retraction downward rotation of scapula

dorsal scapula

Latissimus Dorsi

T6 Spinous Processes to Iliac crest and lower 3 or 4 ribs

Bicipital Groove of humerus

adduction, extension, and medial rotation of humerus

thoracordorsal

Teres Major

inferior angle of the scapula

medial lip of the bicipital groove of the humerus

extension, medial rotation, and adduction of humerus

subscapular

Deltoid

Lateral 1/3 clavicle, acromion, spine of the scapula

deltiod tuberosity

abduction. flexion, extension, medial and lateral rotation of humerus

axillary

Supraspinatus

Supraspinous Fossa of the scapula

upper part of the greater tubercle of the humerus

abduction of humerus, draws humerus toward glenoid fossa

supra-scapular

Infraspinatus

Infraspinous fossa of the scapula

middle portion of the greater tubercle of the humerus

lateral rotation and horizontal abduction of humerus

supra-scapular

Teres Minor

Upper axillary border of the scapula

lower portion of the greater tubercle on the humerus

lateral rotation of humerus

axillary

Subscapularis

Subscapular fossa of the scapula

lesser tubercle of the humerus

medial rotation of humerus

subscapularis

Levator Scapulae

C1-C4

Vertebral border of scapula between superior angle and spine

Bilateral-extends the head and neck Laterally- flexes head and neck and rotates head and neck

Dorsal Scapular