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Questions and Answers
The human body has four limbs: what are they called?
The human body has four limbs: what are they called?
The clavicle is a bone that is directly connected to the skull.
The clavicle is a bone that is directly connected to the skull.
False
What is the function of the clavicle?
What is the function of the clavicle?
What are the two main segments that make up the upper limb?
What are the two main segments that make up the upper limb?
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Which of the following is NOT part of the upper limb?
Which of the following is NOT part of the upper limb?
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The ______ is the most prominent feature of the clavicle's medial end, which connects to the ______.
The ______ is the most prominent feature of the clavicle's medial end, which connects to the ______.
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The clavicle is an S-shaped bone.
The clavicle is an S-shaped bone.
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What are the two surfaces of the clavicle?
What are the two surfaces of the clavicle?
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What is the most lateral aspect of the clavicle called?
What is the most lateral aspect of the clavicle called?
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The inferior surface of the clavicle is wider than the superior surface.
The inferior surface of the clavicle is wider than the superior surface.
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The anterior border of the clavicle is ______ and ______ while the posterior border is more ______.
The anterior border of the clavicle is ______ and ______ while the posterior border is more ______.
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The clavicle is prone to fractures because it is a delicate bone.
The clavicle is prone to fractures because it is a delicate bone.
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Explain how the medial end of the clavicle connects to the sternum.
Explain how the medial end of the clavicle connects to the sternum.
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Study Notes
Clavicle Anatomy
- The clavicle is a long bone, extending from the sternum to the scapula.
- It is positioned medially at its thickest end, inferiorly with a slightly concave face, and its convex border is medial to its end.
- Its shape is described as an italic "S", with two faces, two edges, and two ends.
Clavicle Surface Features
- Superior Surface: Mostly subcutaneous (beneath the skin), flat, and somewhat convex in its middle two-thirds. It has slight grooves for muscle attachments, most notably the sternocleidomastoid and pectoral muscles.
- Inferior Surface: More complex than the superior surface, with several noticeable features including an impression of the costoclavicular ligament; a groove for the subclavius muscle; a tubercle for the coracoclavicular ligament; and a nutrient foramen.
- Anterior Border: Curved and smooth in the medial two-thirds, and rougher and more irregular in the lateral third, providing attachment points for muscles like the pectoralis major.
- Posterior Border: More prominent than the anterior, curving smooth; with attachments for the trapezius and sternocleidomastoid muscles.
- Sternal End: Bulky, articulating with the sternum, presenting a smooth articular surface with two planes.
- Acromial End: Flattened, articulating with the acromion of the scapula.
Clavicle Structure
- The clavicle is a flat bone.
- Its cortex (outer layer) is thick.
- The ends of the clavicle consist largely of spongy bone.
- It is solid and strong, with frequent fracture sites due to its superficial position, but rapid healing occurs
Radiographic Anatomy
- An anteroposterior (AP) radiograph of the clavicle helps visualize the upper chest.
- The medial portion lies above the ribs.
- The inferior border is visible in the supraclavicular fossa.
Development
- The clavicle's ossification begins around the fourth week of life.
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Description
Test your knowledge on the anatomy of the clavicle, a vital bone connecting the sternum to the scapula. This quiz covers the bone's surface features, structure, and muscle attachments. Ideal for anatomy students and enthusiasts alike.
