3D Anatomi Tulang : Os Clavicula (tulang selangka)

Aura Nirwana

27 Aug 201903:49

Summary

TLDRThe video explains the anatomy of the clavicle (collarbone), focusing on its structure, parts, and functions. It describes the clavicle’s S-shape, with the medial (sternal) end connecting to the manubrium of the sternum and the lateral (acromial) end connecting to the scapula. Key anatomical features like the tuberculum conoideum and facies articularis are discussed, along with the attachment points for ligaments such as the coracoclavicular ligament. The video also highlights the role of the clavicle in connecting various skeletal components and the significance of its articulation points in human anatomy.

Takeaways

🔍 The clavicle, or collarbone, has two sides: the right and left, located subcutaneously and shaped like the letter 'S'.
📍 The clavicle is located above the T1 vertebra and has a curved shape with a convex front and concave lateral half.
⚖️ The clavicle has two extremities: the medial end (extremitas sternalis) which articulates with the manubrium of the sternum, and the lateral end (extremitas acromialis) which articulates with the acromion of the scapula.
🦴 Each extremity has articular surfaces for joint connections: facies articularis acromialis on the lateral side and facies articularis sternalis on the medial side.
🧩 The clavicle features several bony landmarks, including the tuberculum conoideum, which serves as an attachment for the ligamentum conoideum.
🔗 The ligamentum conoideum connects the clavicle to the coracoid process of the scapula.
💪 Another important landmark is the linea trapezoidea, which is the attachment site for the ligamentum trapezoideum.
📏 The ligamentum trapezoideum also connects the clavicle to the coracoid process of the scapula, forming part of the coracoclavicular ligament.
🧠 There is a groove on the clavicle called the sulcus musculi subclavii, where the subclavius muscle attaches.
🛠️ The tuberositas costalis or impressio ligamentum costoclaviculare is the attachment point for the ligamentum costoclaviculare, connecting the clavicle to the first rib (costa).

Q & A

What is the location of the clavicle in the human body?
-The clavicle is located subcutaneously above the sternum (T1), and it is shaped like an 'S'.
How many ends does the clavicle have?
-The clavicle has two ends: the sternal end and the acromial end.
What is the function of the sternal end of the clavicle?
-The sternal end of the clavicle, also known as the medial end, articulates with the manubrium of the sternum.
What is the term for the lateral end of the clavicle?
-The lateral end of the clavicle is called the acromial end, which articulates with the acromion process of the scapula.
What is the tubercle on the clavicle called and what is its function?
-The tubercle on the clavicle is called the conoid tubercle, and it serves as the attachment site for the conoid ligament which connects the clavicle to the coracoid process of the scapula.
What is the term for the medial tubercle of the clavicle?
-The medial tubercle of the clavicle is also known as the sternal tubercle, and it serves as the attachment site for the costoclavicular ligament.
What is the costal tuberosity on the clavicle and where is it located?
-The costal tuberosity is a roughened area on the inferior surface of the clavicle, near its sternal end, where the costoclavicular ligament attaches.
What is the subclavius muscle's insertion point on the clavicle?
-The subclavius muscle inserts onto the inferior surface of the clavicle, near its sternal end.
What is the significance of the clavicle's shape in terms of its function?
-The 'S' shape of the clavicle allows it to provide stability to the shoulder joint while also allowing a wide range of motion.
How does the clavicle contribute to the formation of the pectoral girdle?
-The clavicle, along with the scapula, forms the pectoral girdle which supports the arm and allows for its movement.
What is the role of the ligaments attached to the clavicle in the shoulder's stability?
-The ligaments attached to the clavicle, such as the conoid and trapezoid ligaments, provide stability to the shoulder by connecting the clavicle to the scapula and sternum.

Outlines

00:00

🦴 Introduction to Clavicle Anatomy

This paragraph introduces the topic of clavicle anatomy, highlighting that the clavicle consists of two parts (right and left). It is located subcutaneously, making it easily palpable. The shape of the clavicle resembles an 'S,' with the anterior part convex and the lateral half concave. The description sets the foundation for a deeper dive into the clavicle's anatomical structure.

🔍 Key Anatomical Features of the Clavicle

This section discusses the key anatomical structures of the clavicle. The clavicle has two extremities: the medial end called 'extremitas sternalis,' which articulates with the manubrium sterni, and the lateral end called 'extremitas acromialis,' which connects with the acromion of the scapula. The paragraph provides a clear distinction between these two extremities and their respective articulations.

🧩 Clavicle Joint Surfaces and Articular Facets

This part elaborates on the articular facets at the ends of the clavicle. The extremitas acromialis has a 'facies articularis acromialis' that connects with the scapula, while the extremitas sternalis has a 'facies articularis sternalis,' which interacts with the manubrium sterni. These articular surfaces are critical for the clavicle’s connection to the surrounding skeletal structures.

🦵 Ligament Attachments on the Clavicle

The paragraph highlights the ligaments attached to the clavicle, focusing on two key points. First, the 'tuberculum conoideum,' which serves as the attachment for the conoid ligament (connecting the clavicle to the scapula's coracoid process). Second, the 'linea trapezoidea,' which serves as an attachment for the trapezoid ligament. Both ligaments play crucial roles in the stability of the clavicle and its articulation with the scapula.

🔗 Muscle and Ligament Attachments

The discussion here extends to more ligament and muscle attachments, particularly the 'sulcus musculi subclavii,' which is the insertion point for the subclavius muscle. Another important feature is the 'tuberositas costalis,' which serves as an attachment for the costoclavicular ligament, linking the clavicle to the first rib (Os Costae). This provides stability between the clavicle and the ribcage.

⚖️ Clavicle's Costal Tuberosity and Exam Details

This section concludes by emphasizing the importance of distinguishing the 'tuberositas costalis' of the clavicle in examinations. It also introduces the term 'impressio ligamenti costoclavicularis,' which refers to the area where the costoclavicular ligament attaches. The description reinforces the need to properly identify and label the tuberosity in medical exams to avoid confusion with other skeletal structures.

Mindmap

Keywords

💡Anatomy

Anatomy refers to the study of the structure and relationships between body parts. In the context of the video, it is central to understanding the physical components of the human body, specifically the shoulder girdle and the clavicle. The script discusses various anatomical landmarks and structures, such as the 'clavicle' and 'acromion process', which are crucial for comprehending the overall theme of the video.

💡Clavicle

The clavicle, commonly known as the collarbone, is a long bone that connects the shoulder blade to the sternum. It plays a key role in the video's discussion of the shoulder girdle's anatomy. The script mentions the 'clavicle' in relation to its position and its articulations with other bones, such as the 'manubrium sterni' and 'acromion process'.

💡Scapula

The scapula, or shoulder blade, is a flat, triangular bone that forms the back of the shoulder girdle. It is integral to the video's exploration of upper body anatomy. The script describes the scapula's 'acromion process' and its 'sternal end', which are essential for understanding the shoulder's structure and function.

💡Articulation

Articulation in anatomy refers to the way bones meet and connect at joints. The video script discusses the 'articulation' of the clavicle with the 'acromion process' and the 'manubrium sterni', highlighting how these joints allow for movement and stability in the shoulder region.

💡Subclavian

Subclavian pertains to structures beneath the clavicle, such as the subclavian artery and vein. The script mentions the 'subclavian' in relation to the 'subclavius muscle', which inserts into the clavicle and is part of the anatomy discussed in the video.

💡Acromion Process

The acromion process is the lateral extension of the scapula, forming the highest point of the shoulder. It is highlighted in the video as it articulates with the clavicle to form the shoulder joint. The script describes the 'acromion process' in the context of the shoulder's anatomy.

💡Sternal End

The sternal end refers to the medial end of the clavicle that articulates with the manubrium of the sternum. The video script uses the term 'sternal end' to explain how the clavicle connects to the chest, which is vital for understanding the shoulder girdle's function.

💡Tubercle

A tubercle in anatomy is a small bump or projection on a bone, often serving as an attachment site for muscles or ligaments. The script refers to the 'tubercle' on the clavicle, known as the 'conoid tubercle', which is where the conoid ligament attaches, illustrating the intricate connections in the shoulder area.

💡Ligament

Ligaments are fibrous connective tissues that connect bones to each other, providing stability to joints. The video script discusses various ligaments, such as the 'conoid ligament' and 'trapezoid ligament', which attach to the clavicle and scapula, emphasizing their importance in maintaining shoulder joint integrity.

💡Muscle Insertion

Muscle insertion refers to the point where a muscle attaches to a less movable or stationary bone. The script mentions the 'subclavius muscle' inserting into the clavicle, which is crucial for understanding muscle function and the mechanics of the shoulder.

💡Costal Tubercle

The costal tubercle is a small bump on the inner side of the clavicle where the costoclavicular ligament attaches. The video script specifies the 'costal tubercle' to explain the attachment site of this ligament, which connects the clavicle to the first rib and is important for shoulder stability.

Highlights

Discussion begins on clavicle anatomy, specifying two clavicles on the right and left side.

Clavicle is located in the subcutaneous layer, making it palpable and easily identified.

The clavicle is situated above the T1 vertebra and has an S-shaped curve.

The medial part of the clavicle is convex, and the lateral part is concave.

Explanation of the anatomical structure of the clavicle, focusing on two main ends: the sternal and acromial extremities.

The sternal extremity articulates with the manubrium sterni, forming the sternoclavicular joint.

The acromial extremity articulates with the acromion of the scapula, forming the acromioclavicular joint.

The clavicle features articular surfaces at both extremities, including the facies articularis acromialis and facies articularis sternalis.

Clavicle contains several bony projections, such as the conoid tubercle, which serves as an attachment site for the coracoclavicular ligament.

The conoid ligament connects the coracoid process of the scapula with the clavicle.

Another notable structure is the trapezoid line, which serves as an attachment point for the trapezoid ligament.

The trapezoid ligament also connects the clavicle to the coracoid process of the scapula.

The clavicle's subclavian groove serves as an insertion point for the subclavius muscle.

Mention of the costal tuberosity (tuberositas costalis), located on the inferior surface of the clavicle.

The costal tuberosity is the attachment point for the costoclavicular ligament, which connects the clavicle to the first rib.