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Lattisimus Dorsi

O: Thoracic, lumbar, sacrum, illium & ribs #8-12

I: Bicipital groove

A: Adduction, extension, and medial rotation

O: 1st Rib

I: Clavicle

A: Depression of clavicle, draws shoulder forward and down.

O: Base of skull, 7th cervical, all thoracic vertebrae

I: Clavicle, acromion, and spine of scapula

A: Elevation, retract & depress, and upward rotation of scapula

O: Upper nine ribs

I: Medial border of scapula

A: Abduction, protraction, and upward rotation of scapula

O: Infraspinous fossa

I: Greater tubercule

A: External rotation, horizontal abduction, and extension

O: 2-5 thoracic vertebrae

I: Medial border of scapula

A: Adduction, retracts, elevates and rotates scapula

O: Coracoid process

I: Middle shaft of humerus

A: Adduction and flexion

O: Clavicle and scapula

I: Deltoid tuberosity

A: Flexion, medial rotation, abduction, extension, lateral rotation

O: Subscapular fossa

I: Lesser tubercule

A: Internal rotation, adduction, extension

O: Clavicle, sternum, and ribs #1-7

I: Bicipital groove

A: Protracts scapula, flexion, adduction, and medial rotation

O: 3-5 Ribs

I: Coracoid process

A: Pulls scapula down and forward, draws rib cage up

O: C7 and T1

I: Medial border of scapula

A: Retracts, rotates, and stabilizes scapula

O: C1 - C4

I: Vertebral border (scapula)

A: Elevates and draws scapula medially

O: Lateral border (scapula)

I: Greater tubercule

A: External rotation and horizontal abduction

O: Supraspinous fossa

I: Greater tubercule

A: Abduction

O: Lateral border (scapula)

I: Bicipital groove

A: Extension, adduction, medial rotation

Glenohumeral internal rotation deficit

(GIRD)

Difference internal rotation range of motion between a person's throwing and non-throwing shoulders.

Stretching is recommended to regain lost range of motion

• Coracoclavicular (CC)
• Acromioclavicular (AC)
• Coracoacromial (CA)
• Glenohumeral (GH)
• Coracohumeral (CH)
• Transverse humeral