Identify These Deltoid Muscle Images and Explain Briefly About Them Flashcards

Anterior Deltoid Muscle (Shoulder Joint) Origin: Lateral 1/3 of Clavicle Insertion: Deltoid Tuberocity of Humerus Action: Horizontal Adduction, Flexion, Internal Rotation Notes:

Middle Deltoid Muscle (Shoulder Joint)
Origin: Acromion Process
Insertion: Deltoid Tuberocity of Humerus
Action:  Abduction
  Notes:

Posterior Deltoid Muscle (Shoulder Joint)
Origin: Inferior Portion of Spine of the Scapula
Insertion: Deltoid Tuberocity of Humerus
Action:  Extension, Hyperextension, External Rotation, Horizontal Abduction
  Notes:

Supraspinatus (Shoulder Joint- Rotator Cuff)
Origin: Axillary Border of Scapula
Insertion: Greater Tubercle
Action:  Abduction
  Notes:

Infranatus (Shoulder Joint-Rotator Cuff) Origin: Infraspanatus Fossa of Scapula Insertion: Greater Tubercle Action: External Rotation, Horizontal Abduction Notes: Kissing Cousin to Teres Minor-Same Actions

Teres Minor (Shoulder Joint-Rotator Cuff) Origin: Axillary Border of Scapula Insertion: Greater Tubercle Action: External Rotation, Horizontal Abduction Notes: Kissing Cousn to Infraspinatus

Subscapularis (Shoulder Joint-Rotator Cuff) Origin:Subscapular Fossa of Scapula Insertion:Lesser Tubercle Action: Internal Rotation Notes: Only rotator cuff muscle to insert on lesser tubercle

Teres Major (Shoulder Joint) Origin: Axillary Borderof the Scapula Nearthe inferior angle. Insertion: Crest (below lesser tubercle) Action: Extension, internal rotation, adduction. Notes: Interior to Teres Minor, wraps around to anterior portion of humerus.

CoracoBrachialis (Shoulder Joint) Origin: Coracoid Process of Scapula Insertion: Medial Surface of Humerus Action: Stabilizes shoulder joint.  Will ASSIST with shoulder flexion and adduction. Notes: SYNERGEST

Pectoralis Major Clavicular (Shoulder Joint) Origin: Medial 1/3 of clavicle Insertion: Lateral Lip of Bicipital Groove Action: Shoulder flexion to 90 degrees Notes:

Pectoralis Major Sternal (Shoulder Joint) Origin: Sternum & Costa Cartilage of first 6 ribs Insertion: Lateral Lip of Bicipital Groove Action: Shoulder extension from 90 to 0 degrees Notes:

Latissimus Dorsi (Shoulder Joint) Origin: Spinous Process of T7-L5, Posterior Sacrum & Iliac Crest, Lower 3 ribs, Inferior angle of the Scapula Insertion: Medial Lip of Bicipital Groove Action: Shoulder extension from 90 to 0 degrees Notes: Inserts in groove like the pecs

Upper Trapezius (Shoulder Girdle) Origin: Occipital Bone and Nuchal Ligament (off Spinous Process of Spine) Insertion: Lateral 1/3 of Posterior Clavicle and Acromion Process Action: Scapular Elevation, Upward Rotation, ASSISTS with retraction Notes:

Middle Trapezius (Shoulder Girdle) Origin: Spinous Processes of C7-T3-5 Insertion: Superior Portion of Scapular Spine Action: Retraction Notes:

Lower Trapezius (Shoulder Girdle) Origin: Spinous Processes of T6-T12 Insertion: Baseof Spine of Scapula Action: Depression, Upward Rotation Notes: In upward rotation, spine of scapula angles downward and shortens lower trap.