The manubrium is the uppermost, broadest part of the sternum, or breastbone. It plays a crucial role in the skeletal structure of the chest.
Key Features of the Manubrium
Here's a breakdown of the manubrium's defining characteristics, based on the provided reference:
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Location: It is the most proximal and broadest part of the sternum. In simpler terms, it’s the top, widest section of your breastbone.
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Articulation: The manubrium connects with other bones:
- Laterally: It connects with the clavicles (collarbones) and the first ribs. These connections are vital for shoulder and upper body movement.
- Distally: It joins with the body of the sternum via the manubriosternal joint. This joint allows for a slight degree of movement.
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Shape: It's generally described as a broad, quadrilateral bone.
Function of the Manubrium
The primary functions of the manubrium include:
- Structural Support: It provides a foundation for the chest cage.
- Muscle Attachment: It serves as a site for the attachment of several muscles in the chest and neck.
- Protection: It, along with the other parts of the sternum, protects vital organs like the heart and lungs.
Summary Table
| Feature | Description |
|---|---|
| Location | Most proximal (top) and broadest part of the sternum |
| Articulation | Connects to clavicles, first ribs, and body of the sternum |
| Shape | Broad, quadrilateral bone |
| Function | Provides structural support, muscle attachment, and protection for vital organs |
