Deltoid ridge of humerus in meant fora)Articulationb)Attachment of musclesc)Protectiond)None of theseCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The deltoid tuberosity is a roughened, V-shaped region located on the lateral side in the middle of the humerus shaft. As its name indicates, it is the site of attachment for the deltoid muscle.

Answer

In  human anatomy, the deltoid tuberosity is a rough, triangular area on the anterolateral (front-side) surface of the middle of the humerus to which the deltoid region is present.

Answer

Attachment of muscles
The deltoid ridge of the humerus serves as the attachment site for several important muscles in the upper arm and shoulder region. This bony ridge provides a stable anchor point for these muscles, allowing them to exert force and move the arm effectively. Here are some key points about the function of the deltoid ridge in muscle attachment:
- Muscular attachment: The deltoid muscle itself attaches to the deltoid ridge, which runs along the lateral side of the humerus. This muscle is responsible for the abduction, flexion, and extension of the arm at the shoulder joint.
- Rotator cuff muscles: The rotator cuff muscles, including the supraspinatus, infraspinatus, teres minor, and subscapularis, also attach to the deltoid ridge. These muscles play a crucial role in stabilizing and rotating the shoulder joint.
- Other muscles: Additionally, various muscles of the upper arm and shoulder, such as the pectoralis major, latissimus dorsi, and teres major, have tendons that attach to the deltoid ridge. These muscles contribute to movements such as arm adduction, extension, and internal and external rotation.
- Mechanical advantage: The attachment of these muscles to the deltoid ridge allows for efficient force transmission and optimal leverage during arm movements. The ridge acts as a fulcrum, enabling the muscles to generate and control the necessary forces for different actions.
In summary, the deltoid ridge of the humerus is primarily meant for the attachment of muscles. It provides a secure anchor point for several important upper arm and shoulder muscles, allowing them to exert force and facilitate various arm movements.

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