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.

Outlines

00:00

🦴 Anatomy of the Scapula

The script discusses the anatomy of the scapula, or shoulder blade, which is a flat bone with two sides, right and left. It is located between the second and seventh ribs. The scapula is triangular in shape and has two surfaces: the anterior (facies costalis) and the posterior (facies dorsalis or facies posterior). The scapula features a diagonal ridge known as the Spina Scapulae, which has upper and lower lips. The Spina Scapulae projects upwards to form the acromion, the highest point of the shoulder that can be touched with the hand. The acromion is slightly curved, forming the angulus acromialis. At the end of the acromion, there is a facet for the articulation with the acromial process of the clavicle. Below the Spina Scapulae, there are two fossae: supraspinata and infraspinata. There is also a subscapular fossa on the anterior side. The scapula has a medial edge called the Margo medialis and a lateral edge called the Margo lateralis. Between these edges is the angulus inferior. The Margo Superior connects with the Margo medial and forms the angulus superius. There is an incisura scapulae on the Margo Superior, which is where the Supraspinata nerve passes through. Above this, there is the transverse ligament. The Margo Superior also has a process called the processus coracoideus, which resembles a bird's beak. Below this process is the cavitas glenoidalis, where the head of the humerus bone of the humerus bone attaches. Above the cavitas glenoidalis, there is a small projection called the tuberculum supra glenoid, and below it is the tuberculum infra glenoid.

05:07

🔗 Glenoid Cavity and Coracoclavicular Ligament

This paragraph continues the discussion on the scapula, focusing on the glenoid cavity, which also forms the scapular neck or the coracoclavicular ligament. This part of the scapula is crucial for the attachment of the clavicle and the stability of the shoulder joint.

Keywords

💡Os Skapula

The Os Skapula, or scapula, is a flat triangular bone that is part of the shoulder girdle. It is a key structure in the upper body, connecting the clavicle and the humerus. In the video, the anatomy of the scapula is discussed extensively, highlighting its various features and their functions.

💡Coste

Coste refers to the ribs in the human body. The script mentions that the scapula is positioned between the second and seventh ribs, indicating its location in the thoracic region and its role in the shoulder girdle.

💡Facies Costalis

Facies Costalis is the anterior surface of the scapula, which is the side closer to the chest. The script describes this surface as part of the scapula's anatomy, emphasizing its position relative to the body's anterior aspect.

💡Facies Dorsalis

Facies Dorsalis, also known as the posterior surface, is the back part of the scapula. It is mentioned in the script as the part of the scapula that faces away from the body's anterior, highlighting the scapula's structure from the back.

💡Spina Scapulae

Spina Scapulae is a diagonal ridge on the scapula. The script explains that it has upper and lower lips and extends upwards to form the acromion, which is a significant landmark in the shoulder region.

💡Acromion

Acromion is the highest point of the shoulder, palpable as a bony bump at the lateral end of the shoulder. The script describes it as hook-shaped, forming the angle known as the angulus acromialis, which is a key anatomical feature in the shoulder area.

💡Fossa Supraspinata

Fossa Supraspinata is a cavity located above the Spina Scapulae. The script mentions it as part of the scapula's anatomy, indicating areas where muscles and other structures attach.

💡Fossa Infraspinata

Fossa Infraspinata is a cavity located below the Spina Scapulae. In the script, it is described as one of the fossae of the scapula, providing insight into the complex structure of the scapula.

💡Margo Medialis

Margo Medialis is the medial border of the scapula, which is the thinner edge. The script describes it as part of the scapula's triangular shape, emphasizing its distinct features.

💡Margo Lateralis

Margo Lateralis is the lateral border of the scapula, which is thicker than the Margo Medialis. The script mentions it in the context of the scapula's overall structure, highlighting the differences between its edges.

💡Angulus Inferior

Angulus Inferior is the inferior angle of the scapula, connecting the Margo Medial and Margo Lateral. The script describes it as forming a distinct angle, which is crucial for understanding the scapula's shape and orientation.

💡Cavitas Glenoidalis

Cavitas Glenoidalis is the glenoid cavity, which is the part of the scapula that articulates with the head of the humerus. The script explains its role in shoulder joint formation, emphasizing its importance in the shoulder's function.

Highlights

Os Skapula is a flat bone located between the 2nd and 7th ribs.

The scapula has anterior and posterior aspects, superior and inferior borders.

It is triangular in shape with two surfaces: anteriorly called facies costalis and posteriorly facies dorsalis.

The Spina Scapulae is a diagonal ridge in the middle of the scapula.

The Spina Scapulae has upper and lower lips.

The Acromion is the highest point of the shoulder, forming the angle known as the angulus acromialis.

The Acromion has a facies articularis clavicularis where the acromial end of the clavicle articulates.

There are two fossae above and below the Spina Scapulae: supraspinata and infraspinata.

Anteriorly, there is the fossa subscapularis.

The medial border of the scapula is called Margo medialis, which is thinner.

The lateral border, Margo lateralis, is thicker than the Margo medialis.

The Margo superior connects with the Margo medial to form the angulus superius.

The incisura scapulae on the Margo Superior is the passage for the Supraspinata nerve.

The processus coracoideus on the Margo Superior resembles a raven's beak.

Beneath the processus coracoideus is the cavitas glenoidalis where the head of the humerus attaches.

The tuberculum supra glenoid is a small projection above the cavitas glenoidalis.

The tuberculum infra glenoid is located inferior to the cavitas glenoidalis.

The cavitas glenoidalis also forms the neck of the scapula known as the column scapulae or leher skapula klaviku.

Transcripts

OK kali ini saya akan membahas anatomi di Os.  skapula atau tulang belikat tulang belikat itu  

ini ya ada dua kanan dan kiri, tulang belikat ini  dia itu merupakan jenis tulang pipih letaknya itu  

ada diantara coste 2 sampai coste 7. Okeh langsung  saja kita akan membahas struktur anatominya. Oke  

ini adalah struktur dari Os. Skapula, ini tampak  dari anterior bagian posteriornya itu seperti ini,  

Superior nya seperti ini dan inferior nya seperti  ini. Os. Skapula ini dia itu adalah tulang pipih,  

tulang pipih yang berbentuk segitiga nah  kemudian Os. Skapula dia itu punya dua permukaan  

atau fasies yaitu yang pertama pada bagian  anterior yaitu disebut dengan facies costalis  

sedangkan pada bagian posteriornya itu disebut  dengan facies dorsalis atau facies posterior

pada Os. Skapula ini terdapat pada  tengah-tengahnya ada suatu rigi diagonal  

yang disebut dengan Spina Scapulae. Nah Spina  Scapulae ini ada struktur tambahan lagi itu  

upper lip dan lower lips maksudnya bibir atas  dan bibir bawah dari Spina Scapulae. Nah kemudian  

Spina Scapulae ini dia menjorok ke atas atau  menonjol ke atas dia akan membentuk acromion.  

Acromion ini adalah titik tertinggi dari bahu yang  bisa diraba dengan tangan kita, acromion ini dia  

bentuknya sedikit bengkok ya sehingga membentuk  angulus acromialis, angulus ini kan artinya sudut  

dia karena dia membentuk sudut. Nah kemudian pada  bagian ujung Acromion ini ada facies articularis  

clavicularis ini adalah fasies tempat bertemunya  ekstremitas acromialis Os. Clavicula dengan  

prosesus acromion atau acromion. Nah kemudian  setelah kita membahas Spina Scapulae diatas  

dan dibawah diri spina skapula ada suatu cekungan  yang disebut dengan fossa. Nah fossa-nya itu ada  

dua yaitu fosa supraspinata yaitu cekungannya ada  di atas spina scapulae kemudian fossa infraspinata  

yaitu cekungan yang ada di bawah Spina scapulae.  Kemudian ada juga fossa yang lain yang terletak  

pada bagian anterior yaitu fossa subscapularis  nah kemudian Os. Skapula ini dia kan bentuknya  

segitiga ya Nah pada bagian yang medial ini ya  ya ini disebut dengan Margo medialis yaitu bagian  

tepinya yang tipis, yah ini margo medialis.  Nah kemudian ada margo lateralis atau tepi  

lateral dia itu lebih tebal daripada Margo media  nah antara Margo medial dan margo lateral ini  

dia dihubungkan oleh suatu sudut yang disebut  dengan angulus inferior kemudian ada juga ini  

yaitu Margo Superior. Margo Superior ini dia  berhubungan dengan Margo medial dan membentuk  

angulus superius. Kemudian pada Margo Superior  itu ada suatu cekungan tajam ini ini namanya  

incisura scapulae yaitu tempat lewatnya nervus  Supraspinata. Kemudian di atasnya itu juga nanti  

ada ligamentum itu ligamentum transversum.  Nah pada bagian Margo Superior ini dia ada  

suatu tonjolan ini yaitu processus coracoideus,  coracoid itu maksudnya mirip dengan paruh burung  

gagak oid oid oid itu kan artinya mirip Nah karena  dia bentuknya mirip dengan paruh burung gagak  

sehingga disebut dengan processus coracoideus  lagu diam dibawahnya itu ada yang namanya  

cavitas glenoidalis. Cavitas glenoidalis ini dia  itu tempat melekatnya tempat menempelnya Caput  

Humeri Os. Humerus. Kemudian pada bagian atas  cavitas glenoidalis ini ada suatu tonjolan kecil  

ini ya tonjolan ini disebut dengan tuberkulum  Supra glenoid karena letaknya ada di atas  

cavitas glenoidalis kemudian dibawahnya juga ada  tonjolan lagi yaitu tuberkulum infra glenoidal,  

karena letaknya lebih inferior dari  cavitas glenoidalis. Kemudian cavitas  

glenoidalis ini juga sekaligus membentuk  colum scapulae atau leher skapula klavikula