MUSCLES Flashcards
What is the origin of the Supraspinatus muscle?
Supraspinous fossa of the scapula
The Supraspinatus is part of the rotator cuff group.
What is the insertion point of the Supraspinatus muscle?
Greater tubercle of the humerus
The insertion allows for movement at the shoulder joint.
What action does the Supraspinatus muscle perform?
Abducts arm
This action is crucial for raising the arm.
What is the origin of the Infraspinatus muscle?
Infraspinous fossa of the scapula
It is also part of the rotator cuff.
What is the insertion point of the Infraspinatus muscle?
Greater tubercle of the humerus
This allows for lateral rotation of the arm.
What action does the Infraspinatus muscle perform?
Rotates arm laterally
This action helps in various arm movements.
What is the origin of the Teres minor muscle?
Lateral border of the scapula
It assists in arm rotation and stabilization.
What is the insertion point of the Teres minor muscle?
Greater tubercle of humerus
Its position aids in lateral rotation of the arm.
What action does the Teres minor muscle perform?
Rotates arm laterally
This contributes to shoulder mobility.
What is the origin of the Teres major muscle?
Inferior angle of the scapula
It plays a significant role in arm movement.
What is the insertion point of the Teres major muscle?
Lesser tubercle of the humerus
This insertion allows for specific arm motions.
What actions does the Teres major muscle perform? (List them)
- Adducts arm
- Rotates arm medially
- Extends arm at shoulder
It is essential for various upper limb functions.
What is the origin of the Subscapularis muscle?
Subscapular fossa of the scapula
It is the largest muscle of the rotator cuff.
What is the insertion point of the Subscapularis muscle?
Lesser tubercle of the humerus
This allows it to effectively rotate the arm.
What action does the Subscapularis muscle perform?
Rotates arm medially
It helps in stabilizing the shoulder joint.
