Clavicle Anatomy Quiz
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Questions and Answers

The human body has four limbs: what are they called?

  • Two lower limbs and two upper limbs
  • Two forelimbs and two hindlimbs
  • Two upper limbs and two lower limbs (correct)
  • Two arms and two legs

    • The clavicle is a bone that is directly connected to the skull.

    False (B)

    What is the function of the clavicle?

  • To protect the heart
  • To allow for movement of the elbow
  • To connect the shoulder blade to the sternum (correct)
  • To support the weight of the head

    • What are the two main segments that make up the upper limb?

    <p>The shoulder and the arm</p> Signup and view all the answers

    Which of the following is NOT part of the upper limb?

    <p>Femur (A)</p> Signup and view all the answers

    The ______ is the most prominent feature of the clavicle's medial end, which connects to the ______.

    <p>The medial end of the clavicle is characterized by the presence of a <strong>sternal articulation</strong>, which is the point where the clavicle connects to the <strong>sternum</strong> (breastbone).</p> Signup and view all the answers

    The clavicle is an S-shaped bone.

    <p>True (A)</p> Signup and view all the answers

    What are the two surfaces of the clavicle?

    <p>The superior surface and the inferior surface</p> Signup and view all the answers

    What is the most lateral aspect of the clavicle called?

    <p>Acromial end (D)</p> Signup and view all the answers

    The inferior surface of the clavicle is wider than the superior surface.

    <p>True (A)</p> Signup and view all the answers

    The anterior border of the clavicle is ______ and ______ while the posterior border is more ______.

    <p>The anterior border of the clavicle is smooth and rounded, while the posterior border is more prominent.</p> Signup and view all the answers

    The clavicle is prone to fractures because it is a delicate bone.

    <p>False (B)</p> Signup and view all the answers

    Explain how the medial end of the clavicle connects to the sternum.

    <p>The medial end of the clavicle articulates with the sternum through a joint called the sternoclavicular joint. The joint is reinforced by strong ligaments to provide stability and allow limited movement.</p> Signup and view all the answers

    Flashcards

    Clavicle Function

    The clavicle, or collarbone, connects the upper limb to the axial skeleton (chest).

    Clavicle Location

    Extends from the sternum to the scapula (shoulder blade).

    Clavicle Shape

    S-shaped.

    Clavicle Surfaces

    Two main faces: superior and inferior.

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    Superior Clavicle Surface

    Mostly smooth, medial 2/3 is convex, lateral 1/3 is flat.

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    Inferior Clavicle Surface

    More complex, with ligamentous impressions, a foramen and muscles attachments.

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    Clavicle Borders

    Two borders: Anterior and Posterior, with muscle attachments.

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    Sternal Extremity

    Thick end of the clavicle, articulates with the sternum.

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    Acromial Extremity

    Flat end of the clavicle, articulates with the acromion of the scapula.

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    Intramembranous Ossification

    The process by which the clavicle develops.

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    Pectoral Girdle

    The clavicle and the scapula form the pectoral girdle.

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    Medial Clavicle Position

    The thicker end of the clavicle faces medially towards the body's center.

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    Lateral Clavicle Position

    The concave/thinner end is positioned ventrally (front of the body).

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    Radiographic Anatomy

    A view of the clavicle on an X-ray.

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    Clavicle Structure

    The clavicle is a flat bone relatively resistant to fractures.

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    SternoClavicular Joint

    The joint between the sternum and the clavicle.

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    Upper Limb

    The upper limb consists of the pectoral girdle and the free part of the upper limb.

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    Scapula

    The shoulder blade, part of the pectoral girdle.

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    Steroclavicular Ligament

    One of the ligaments on the clavicle.

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    Muscular Attachments (Clavicle)

    Clavicle serves as an attachment point for muscles of the chest, neck and shoulder.

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    Free Portion of Upper Limb

    The portion of the upper limb that includes the humerus, radius, ulna, carpals and hand bones

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    Medullary Canal

    The marrow cavity inside long bones

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    Radiograph

    An X-ray image

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    Ribs

    Ribs create the upper chest.

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    Cortex

    Outer layer of the bone

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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.

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