Synergist & Antagonist
Attachments
Muscles
Name that
Muscles
Muscles
Motions
100
This muscle synergistically assists the subscapularis in medially rotating the arm at the shoulder.
What is the pectoralis major muscle?
100
The teres minor muscle extends from this rough strip on the lateral border of the scapula to the greater tubercle of the humerus.
What is the lateral scapular border?
100
Muscle on anterior upper arm, has 2 heads, helps with elbow flexion (curls) and shoulder flexion
Biceps
100
axillary
100
Raising the arm up in front of the body
Flexion (Biceps muscle group)
200
This muscle acts as an antagonist to the deltoid during arm adduction, bringing the arm back to the body.
What is the latissimus dorsi muscle?
200
The supraspinatus muscle attaches to this part of the scapula, located above its spine, and inserts at the greater tubercle of the humerus.
What is the supraspinatus fossa?
200
Group of 4 muscles that provide dynamic stability to glenohumeral joint
Rotator Cuff Muscles
200
Deltoid
200
Adduction
300
In arm extension, this muscle functions as a synergist to the deltoid muscle, particularly the posterior deltoid.
What is the trapezius muscle?
300
This rotator cuff muscle originates from the infraspinatus fossa of the scapula and inserts at the greater tubercle of the humerus, aiding in lateral rotation.
What is the infraspinatus muscle?
300
Rotator cuff muscle: "Superior to the Spine of the scapula"
Supraspinatus
300
trapezius
300
Rotating the humerus laterally
External Rotation (Supraspinatus, Infraspinatus, Teres Minor)
400
This muscle synergizes with the deltoid, especially during the initial phase of arm abduction, and is part of the rotator cuff group.
What is the supraspinatus muscle?
400
This point of attachment for the deltoid muscle is found on the lateral aspect of the clavicle, acromion, and spine of the scapula.
What is the deltoid tuberosity of the humerus?
400
Rotator cuff muscle: "Inferior to the Spine of the Scapula"
Infraspinatus
400
coracobrachialis
400
Rotating the humerus medially
Internal Rotation (Subscapularis)
500
This muscle, known for its role in arm flexion at the shoulder, acts as an antagonist to the deltoid during shoulder extension movements.
What is the pectoralis major muscle?
500
This muscle, known for its two heads, attaches to the coracoid process and the supraglenoid tubercle of the scapula, and inserts at the radial tuberosity.
What is the biceps brachii muscle?
500
Rotator cuff muscle: "Under the Scapula"
Subscapularis
500
Rhomboid Major
500
Pulling the arm backwards
Extension (Triceps muscle group)