Origins
Origin of the common flexor tendon
Medial epicondyle
Insertion for the deltoid
Deltoid tuberosity
Which rotator cuff muscle is not involved in the rotation of the humerus?
Supraspinatus
This phase has the least muscle activity
Wind-up
Which muscle has this origin: lateral 1/3 of the scapula, acromion, and spine of the scapula
Deltoid
What is the shared insertion for three out of four of the rotator cuff muscles?
Greater tubercle
Name an action of the flexor carpi ulnaris that is not wrist flexion
Wrist adduction
During which phase does the shoulder have the most eccentric contractions?
Deceleration
Origin of the teres minor
upper 2/3 of the lateral border of the scapula
Insertion of the teres major
Crest of the lesser tubercle of the humerus
This muscle aids in the "thumbs up" sign.
Abductor pollicus longus
What is the maximum internal rotation velocity during the acceleration phase?
7500 degrees per second
What muscle originates on the medial, anterior surface of the distal ulna?
Pronator Quadratus
Insertion of pectoralis major
crest of the greater tubercle of the humerus
Pinching the pinky and thumb together highlights what muscle?
Palmaris longus
Wind-up, cocking, acceleration, deceleration, follow through
Name the origin of the extensor digitorum.
common extensor tendon, lateral epicondyle
Insertion of the extensor indicis
tendon of the extensor digitorum on the second metacarpal
A "winged scapula" often indicates weakness to what muscle?
serratus anterior
During pitching, the shoulder exceeds the normal range of motion in this direction
external rotation