Muscle Actions- Lecture Unit 2 Exam Flashcards
Trapezius- A
Stabilizes the Scapula
Upper Portion: Elevates scapula
Middle & Lower Portion: Adducts the scapula
Rhomboid Major- A
Elevate & Adducts Scapula
Helps Stabilize the Scapula
Rhomboid Minor- A
Elevate & Adducts Scapula
Helps Stabilize Scapula
Levator Scapula- A
Elevate Scapula
Adducts Scapula
Stabilize Scapula
Latissimus Dorsi- A
Extends, Adduct & Medially Rotate the Humerus
Involved in forced Expiration
Serratus Anterior- A
Abduction/Protraction of Scapula
Stabilizes Scapula
Involved w/ Forced Inspiration (when humerus is abducted)
Deltoid- A
Anterior Portion: Flexes & Medially Rotates Arm
Middle Portion: Abducts Arm
Posterior Portion: Extends & Laterally Rotates Arm
Supraspinatus- A
Initiates Abduction of Arm
Helps Laterally Rotate Humerus
Helps Stabilize Shoulder Joint
Infraspinatus- A
Laterally rotates the Humerus
Stabilizes Shoulder Joint
Subscapularis- A
Medially Rotates Humerus
Stabilizes Shoulder Joint
Teres Major- A
Adducts Humerus
Stabilizes Shoulder Joint
Medially Rotates Humerus
Teres Minor- A
Laterally Rotates Humerus
Stabilizes Shoulder Joint
Biceps Brachii- A
Flexions of Forearm
Supinates the Radius
Coracobrachialis- A
Flexion & Weak adduction of Arm (Shoulder Joint)
Stabilizes Shoulder Joint
Brachialis- A
Flexes Forearm
Triceps Brachii- A
Extension of Forearm
Pronator Teres- A
Pronates Forearm at Superior RadioUlnar Joint
Assists flexion at Elbow Joint
Flexor Carpi Radialis- A
Equal Prime Mover for Flexion of Hand at Wrist Joint
Assists in Abduction of Hand