BTW
https://www.physio-pedia.com/Latissimus_Dorsi_Muscle
唔想搵SOURCE
Action
Depression, adducts, extends and internally rotates the arm at the shoulder[4]
Primary Actions of the Latissimus Dorsi
1. Adduction of the arm at shoulder
Agonists: Pectoralis Major, Teres Major, Triceps Brachii (long head)
Antagonists: Deltoid (middle) Supraspinatus
2. Extension of the arm at the shoulder
Angonists: Deltoid (posterior) Triceps brachii (long head), Pectoralis Major (sternal head)
Antagonists: Deltoid (anterior) Biceps brachii, Coracobrachialis, Pectoralis Major (clavicular head)
3. Internal rotation of the arm at the shoulder
Agonists: Subscapularis, Deltoid (anterior), Pectoralis Major, Teres Major
Antagonists: Infraspinatus, Teres minor, Deltoid (posterior)
Secondary Actions of the Latissimus Dorsi
1.
Assists with extension of the trunk
Agonists: Longissimus thoracis, Iliocostalis lumborum, Iliocostalis thoracis
Antagonists: Rectus abdominis
2. Assists with flexion of the trunk
Agonist: Rectus abdominis
Antagonists: Longissimus thoracis, Iliocostalis lumborum, Iliocostalis thoracis
3. Assists with lateral flexion of the trunk
Agonist: Quadratus lumborum, Rectus abdominis
Antagonists: Longissimus thoracis, Iliocostalis lumborum, Iliocostalis thoracis
4.
Assists with anterior and lateral pelvic tilt
Agonist: Rectus abdominis
Antagonists: Semitendinosus, Semimembranosus, Biceps femoris
5.
Assists with depression of the scapula
Agonists: Serratus Anterior (lower fibers), Trapezius (lower fibers), Pectoralis minor
Antagonists: Levator Scapulae, Trapezius (upper fibers)
6. Assist with protraction of the scapula
7. Assists with deep inspiration and forced expiration [5]