3D Anatomi Tulang : Os Scapula ( tulang belikat)

Summary

The script discusses the anatomy of the scapula, a triangular flat bone located between the 2nd and 7th ribs. It highlights the scapula's anterior and posterior surfaces, superior and inferior aspects, and its two main surfaces: the costal and dorsal. Key features include the diagonal spine with upper and lower lips, acromion forming the highest point of the shoulder, and the articular surface for clavicle attachment. It also describes the supraspinous, infraspinous, and subscapular fossae, the medial and lateral margins, and the coracoid process resembling a bird's beak. The glenoid cavity, where the head of the humerus attaches, and its superior and inferior tubercles are also explained.

Takeaways

• 🦴 The scapula is a flat bone located between the 2nd and 7th ribs.
• 🔍 It has anterior and posterior parts with distinct superior and inferior edges.
• 📐 The scapula is triangular in shape with two main surfaces: the costal (anterior) and the dorsalis/posterior.
• 📈 The Spina Scapulae is a diagonal ridge with upper and lower lips.
• 💪 The Acromion is the highest point of the shoulder, forming the lateral end of the shoulder.
• 🤲 The Acromion has an articular surface for the clavicle called the acromial process.
• 🕳 There are two fossae above and below the Spina Scapulae: the supraspinous and infraspinous fossae.
• 🌀 The Subscapular Fossa is located on the anterior side of the scapula.
• 📏 The scapula has medial and lateral margins, with the medial being thinner (Margo medialis) and the lateral thicker (Margo lateralis).
• 🔗 The Margo Superior connects to the Margo medial and forms the superior angle.
• 🕳 The Incisura Scapulae is a sharp notch on the Margo Superior, through which the Supraspinatus nerve passes.
• 🦅 The Processus Coracoideus resembles a bird's beak and is located on the Margo Superior.
• 🔗 The Cavitas Glenoidalis is the socket for the head of the humerus, with the Supra glenoid and Infra glenoid tubercles above and below it, respectively.
• 📐 The scapula also forms the scapular neck or the clavicular neck.

Q & A

What is the scapula and where is it located?

The scapula, also known as the shoulder blade, is a flat bone situated between the ribs and the shoulder joint.

How many scapulae are there in the human body?

There are two scapulae in the human body, one on each side, left and right.

What is the shape of the scapula?

The scapula is a triangular-shaped bone.

What are the two surfaces of the scapula?

The scapula has two surfaces: the anterior surface, known as the facies costalis, and the posterior surface, known as the facies dorsalis or facies posterior.

What is the function of the Spina Scapulae?

The Spina Scapulae is a diagonal ridge on the scapula that protrudes upwards to form the acromion.

What is the acromion and where can it be palpated?

The acromion is the highest point of the shoulder, which can be felt with the hand, and it forms the angle known as the angulus acromialis.

What is the fossa supraspinata and where is it located?

The fossa supraspinata is a hollow located above the Spina Scapulae.

What is the fossa infraspinata and where is it located?

The fossa infraspinata is a hollow located below the Spina Scapulae.

What is the Margo medialis and what is its characteristic?

The Margo medialis is the medial edge of the scapula, characterized by being thinner.

What is the Margo lateralis and how does it compare to the Margo medialis?

The Margo lateralis is the lateral edge of the scapula and is thicker than the Margo medialis.

What is the processus coracoideus and what does it resemble?

The processus coracoideus is a projection on the scapula that resembles the beak of a bird, particularly a raven.

What is the cavitas glenoidalis and its importance?

The cavitas glenoidalis is a cavity on the scapula where the head of the humerus, or the upper arm bone, articulates.

What are the tuberculum supra glenoid and tuberculum infra glenoid and their positions?

The tuberculum supra glenoid is a small projection above the cavitas glenoidalis, while the tuberculum infra glenoid is located below it.