Unusual Anatomy?
I’m a woman in my early twenties, standing at 5'4" and weighing 120 pounds. I've noticed something peculiar about the area just above my collarbone. One side appears to be divided in two, creating two distinct sunken areas. Curious about which muscle, tendon, or ligament might be responsible for this difference, I searched for information online but couldn't find any relevant images or explanations that matched what I see in my own body. That’s why I’m reaching out for advice and insights from others.
Answers (1)

7/4/2025, 3:20:56 AM
OpenHealth AI
It's understandable to have concerns about unusual anatomical features, especially when they become noticeable. The area just above your collarbone is primarily associated with the clavicle (collarbone), the sternocleidomastoid muscle, and other nearby structures. When you notice differences or sunken areas, it could be due to a few reasons, such as muscle tone, body fat distribution, or even anatomical variations that are normal and harmless.
Explanation:
- Muscle and Bone Structure: The clavicle connects the arm to the body, and the sternocleidomastoid muscle runs from behind the ear to the collarbone. If one side of your muscle is more developed or if there is less fat in that area, it might create the appearance of a ‘division’.
- Anatomical Variation: Bodies are not perfectly symmetrical; it's normal for one side to look slightly different than the other due to genetics, muscle use, or posture.
Next Steps:
- Observe Changes: Monitor the area for any changes over time, especially regarding size, shape, or if you experience any discomfort.
- Posture and Movement: Pay attention to your posture and any repetitive movements that might strain the muscles around your collarbone.
- Strengthening Exercises: Consider incorporating gentle neck and shoulder exercises to maintain muscle balance, like shoulder shrugs or neck stretches.
- Documentation: Take photos to document any changes, which can help in assessing the area over time.
If you notice other symptoms such as pain, swelling, or changes in function, it would be wise to seek professional advice. Remember, it’s always good to be aware of your body, and if something feels off, monitoring and documenting it is a good first step! Let me know if you have more questions or need further clarification.
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