Even More Muscles Flashcards
What is the origin of the Deltoid muscle?
Lateral 1/3 of clavicle, acromion process of scapula, spine of scapula
The Deltoid muscle is responsible for arm abduction, flexion, and rotation.
What is the insertion point of the Latissimus dorsi?
Intertubercular groove of the humerus
The Latissimus dorsi is involved in extending, adducting, and medially rotating the arm.
What action does the Pectoralis major perform?
Flexes arm at shoulder, adducts arm, rotates arm medially
The Pectoralis major is critical for movements of the upper limb.
List the muscles of the Pectoral Girdle.
- Deltoid
- Latissimus dorsi
- Pectoralis major
- Levator scapulae
- Rhomboid minor
- Rhomboid major
These muscles contribute to the movement and stabilization of the shoulder girdle.
What are the actions of the Levator scapulae?
Elevates scapula, downwardly rotates scapula
The Levator scapulae plays a key role in shoulder movement.
What is the origin of the Rhomboid major?
Spinous processes of T2-T5
The Rhomboid major assists in adducting and downwardly rotating the scapula.
True or False: The Rhomboid minor originates from the spinous processes of C7-T1.
True
The Rhomboid minor also contributes to the adduction and downward rotation of the scapula.
Fill in the blank: The _______ muscle is responsible for abducting the arm.
Deltoid
The Deltoid is primarily engaged in shoulder abduction.
What actions does the Latissimus dorsi perform?
Extends arm at shoulder, adducts arm, rotates arm medially
It is a large muscle that plays a significant role in upper body movements.
What is the insertion of the Levator scapulae?
Vertebral border of the scapula
This muscle helps in elevating and rotating the scapula.
List the origins of the Rhomboid minor.
- Spinous processes of C7-T1
- Vertebral border of the scapula
This muscle plays a role in scapular movement.
What is the action of the Rhomboid minor?
Adducts scapula, downwardly rotates scapula
The Rhomboid minor aids in stabilizing the scapula.
