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What is the insetion of the trapezius muscle?
Spine of the Scapula Acromion Clavicle
Where did the deltoid start and end?
The deltoid muscle originates from three key points: the lateral third of the clavicle, the acromion of the scapula, and the spine of the scapula. It inserts at the deltoid tuberosity of the humerus. This structure allows it to play a vital role in shoulder movement, including abduction, flexion, and rotation of the arm.
What muscle has it insertion at the clavicle?
The sternocleidomastoid muscle inserts at the clavicle. It originates from the sternum and the clavicle, and its primary actions involve rotating and flexing the head.
What structures are related to lateral end of the spine of the scapula?
Scapula is very interesting bone. It holds the upper limb, but have no bony attachment to your thorax. It is attached to thorax, through the collar bone or the clavicle. Lateral end of the clavicle is attached to the lateral end of the spine of the scapula. On the inside of the spine of the scapula and clavicle, you have insertion of the muscle called as trapezius. From out side of this, you have origin of the deltoid muscle. Technically and mechanically, the trapezius muscle continues as deltoid muscle.
What muscle originates on the anterior surface of the scapula and inserts on the proximal anterior humerus?
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.
Which muscle stabilizes the scapula by preventing extreme elevation and protraction of the clavicle?
The trapezius muscle plays a key role in stabilizing the scapula by preventing extreme elevation and protraction of the clavicle. Its upper fibers help elevate the scapula, while the middle fibers aid in retracting and stabilizing it.
What is the difference between palpating a bony landmark and a muscle?
When you palpate a bony landmark, it will feel harder than the soft tissue around it. For example, feel the point of your shoulder (acromion process of the scapula). Now move more medially (toward the center of your body) to the space between your shoulder and neck. If you feel the front of your body in this area, you will feel the clavicle (collarbone). If you feel the back of the area, you will be on your trapezius muscle, and perhaps supraspinatus and levator scapula. Notice how much softer the muscle areas feel than the bony landmarks. Generally, a bony landmark is a specific place on a particular bone. To use the example above - the acromion process of the scapula - it is the most lateral and superior aspect of the scapula, not just any old place on the scapula.
What is the strongest protractor of the scapula?
The strongest protractor of the scapula is the serratus anterior muscle. It originates from the upper ribs and inserts along the medial border of the scapula. Contraction of the serratus anterior muscle pulls the scapula forward around the rib cage.
Which muscle protracts and depresses the scapula?
The serratus anterior muscle protracts and depresses the scapula. It originates on the upper ribs and inserts along the medial border of the scapula. This muscle is important for stabilizing the scapula during movements like pushing and reaching overhead.
What muscle originates on scapula and proximal humerus and inserts on olecranon process?
The triceps originates on the scapula and proximal humerus and inserts on the olecranon process. The muscles has three heads (hence its name) so it has multiple origins.
Which of these phrases most aptly describes muscle insertion?
The phrase tendon attachment that moves most aptly describes muscle insertion. The trapezius muscle inserts on the acromion and scapular.
What muscle ends where Deltoid begins?
The pectoralis major muscle ends where the deltoid muscle begins at the clavicle and scapula. These muscles are important for shoulder movement and stability.
