Key skeletal muscle origins, insertions, and actions for physical therapy students.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the origin of the short head of the biceps brachii?
- Coracoid process of the scapula
- Where does the biceps brachii insert?
- Radial tuberosity
- What movement does the biceps brachii cause that the brachialis does not?
- Supination of the forearm
- What is the origin of the long head of the triceps brachii?
- Infraglenoid tubercle of the scapula
- Where does the triceps brachii insert?
- Olecranon process of the ulna
- What action does the triceps brachii perform at the elbow?
- Elbow extension
- What are the origin points of the deltoid muscle?
- Clavicle, acromion, and scapular spine
- Where does the deltoid insert?
- Deltoid tuberosity of the humerus
- What is the main action of the middle fibers of the deltoid?
- Abducts the shoulder
- What are the origin points of the pectoralis major?
- Clavicle, sternum, and costal cartilages
- Where does the pectoralis major insert?
- Lateral lip of the intertubercular (bicipital) groove of the humerus
- What shoulder action does the pectoralis major produce?
- Adducts the shoulder
- Where does the latissimus dorsi originate?
- Spinous processes of the lower thoracic and lumbar vertebrae via the thoracolumbar fascia
- Where does the latissimus dorsi insert?
- Intertubercular groove of the humerus
- What shoulder action does the latissimus dorsi produce?
- Extends the shoulder