The supraspinous fossa is a depression on the posterior surface of the scapula. It lies above the spine of the scapula and is bounded by the acromion process laterally, the medial border of the scapula medially, and the superior border of the scapula superiorly. The supraspinous fossa is traversed by the supraspinatus muscle, which originates from the fossa and inserts into the greater tubercle of the humerus.
Location of Supraspinous Fossa Explained in Detail
The supraspinous fossa is a depression on the posterior aspect of the scapula (shoulder blade), located above the spine of the scapula. Here’s a comprehensive breakdown of its structure:
Anatomic Landmarks
- Medial border: Formed by the medial border of the scapula
- Lateral border: Formed by the lateral border of the scapula
- Superior border: Defined by the root of the spine of the scapula
- Inferior border: Marked by the infraspinous fossa
Surrounding Structures
- Above: Acromion process and clavicle
- Below: Infraspinous fossa
- Medially: Trapezius muscle
- Laterally: Deltoid muscle
Orientation and Dimensions
- Triangular in shape
- Runs obliquely from the medial to the lateral border of the scapula
- Approximately 5-6 cm in width at its base
- Depth varies depending on muscle thickness
Table of Attachments
| Structure | Attachment Point | Function |
|---|---|---|
| Supraspinatus muscle | Originates from the supraspinous fossa | Abducts and externally rotates the arm |
| Trapezius muscle | Inserts distally onto the supraspinous fossa | Elevates, retracts, and adducts the scapula |
| Deltoid muscle | Originates from the lateral border of the supraspinous fossa | Abducts the arm |
Question 1:
Where is the supraspinous fossa located?
Answer:
The supraspinous fossa is located on the posterior surface of the scapula (shoulder blade). It is positioned superior to the spine of the scapula and lateral to the vertebral border.
Question 2:
What is the function of the supraspinous fossa?
Answer:
The supraspinous fossa serves as the attachment site for the supraspinatus muscle. This muscle plays a significant role in abducting the arm at the shoulder joint.
Question 3:
What are the clinical implications of the supraspinous fossa?
Answer:
Due to its proximity to the shoulder joint, the supraspinous fossa can be affected by various injuries and conditions. For instance, a supraspinatus muscle tear can cause pain and weakness in the shoulder, while a calcification of the supraspinatus tendon can result in a condition known as “impingement syndrome.”
Well, there you have it! I hope this article has been helpful in clearing up any confusion about the location of the supraspinous fossa. If you’re still curious about other anatomical features or have any more questions, feel free to drop me a line anytime. I’m always happy to chat about anatomy and help you on your journey to becoming a human body expert. Thanks again for reading, and I hope you’ll visit again soon for more informative and entertaining content!