Thoracic Anatomy and Joint Classification
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Thoracic Anatomy and Joint Classification

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Questions and Answers

What type of joint is the facet joint also known as?

  • Ball and socket joint
  • Fibrous joint
  • Synovial plane joint (correct)
  • Synovial hinge joint

    • Which type of joint are intervertebral discs classified as?

  • Primary cartilaginous joint
  • Fibrous joint
  • Secondary cartilaginous joint (correct)
  • Synovial joint

    • What movements do the facet joints primarily allow in the thoracic region of the spine?

  • Flexion and extension
  • Rotation (correct)
  • Abduction and adduction
  • Lateral flexion

    • What is the primary blood supply to the facet joints?

    <p>Supreme intercostal and posterior intercostal arteries 1-10</p> Signup and view all the answers

    Which ligaments are associated with both the facet joints and intervertebral discs?

    <p>Supraspinous ligament</p> Signup and view all the answers

    Which ribs are classified as true ribs?

    <p>Ribs 1-7</p> Signup and view all the answers

    What type of joint is formed by the first costal cartilage and the manubrium?

    <p>Primary cartilaginous joint</p> Signup and view all the answers

    Which part of the chest wall consists of ribs 8-10?

    <p>False ribs</p> Signup and view all the answers

    What is the primary structure that provides attachment for the 1st costal cartilage?

    <p>Manubrium</p> Signup and view all the answers

    How many layers constitute the chest wall as described?

    <p>10 layers</p> Signup and view all the answers

    Which structure acts as a hinge in the thoracic cage to enable movement?

    <p>Sternal angle</p> Signup and view all the answers

    What type of joint are the sternochondral joints 2-7 classified as?

    <p>Synovial planar joints</p> Signup and view all the answers

    Which structure is NOT part of the bony anatomy of the chest wall?

    <p>Endothoracic fascia</p> Signup and view all the answers

    What type of joint is the manubriosternal joint?

    <p>Secondary Cartilaginous joint</p> Signup and view all the answers

    Which ligaments are associated with the xiphisternal joint?

    <p>Xiphichondral ligaments</p> Signup and view all the answers

    How many movement types are primarily associated with the true ribs (3-10)?

    <p>Translation mainly superinferiorly</p> Signup and view all the answers

    Which of the following ribs does not have a tubercle?

    <p>Eleventh rib</p> Signup and view all the answers

    What is the maximum movement allowed at the sternochondral joint 1?

    <p>Minimal movement</p> Signup and view all the answers

    What characterizes the typical ribs (3-10)?

    <p>Two articular facets for vertebral articulation</p> Signup and view all the answers

    Which type of joint is the xiphisternal joint classified as?

    <p>Secondary Cartilaginous joint</p> Signup and view all the answers

    Which rib is characterized as being short, strong, and flat with a tubercle for scalenus anterior?

    <p>First rib</p> Signup and view all the answers

    What joint is primarily involved in the elevation of the clavicle and manubrium of the sternum?

    <p>Sternoclavicular joint</p> Signup and view all the answers

    During unilateral contraction, which function is NOT performed by the descending part of the muscle?

    <p>Stabilizing the scapula on the thoracic wall</p> Signup and view all the answers

    Which artery supplies blood to the ascending part of the muscle described?

    <p>Dorsal scapular artery</p> Signup and view all the answers

    What joint facilitates the rotation of the head in a contralateral direction?

    <p>Atlantoaxial joint</p> Signup and view all the answers

    Which fiber group of the muscle is associated with drawing the scapula anteroinferiorly?

    <p>Transverse part</p> Signup and view all the answers

    What is a primary action of bilateral contraction of the muscle in question?

    <p>Extension at the atlantooccipital joint</p> Signup and view all the answers

    Which of the following actions does the inferior fibers of the pectoral and deltoid NOT facilitate?

    <p>Neck lateral flexion</p> Signup and view all the answers

    Which action is NOT characteristic of the scapulothoracic joint?

    <p>Flexion of the elbow</p> Signup and view all the answers

    What structure does the suprapleural membrane attach to?

    <p>Bony-cartilaginous margins</p> Signup and view all the answers

    Which spinal nerves contribute to the innervation of the anterior scalene muscle?

    <p>C6-C8</p> Signup and view all the answers

    What is the function of the posterior scalene muscle?

    <p>Lateral flexion of the neck</p> Signup and view all the answers

    What condition is characterized by compression of neurovasculature in the thoracic inlet?

    <p>Thoracic outlet syndrome</p> Signup and view all the answers

    Which artery supplies blood to the superior thyroid gland?

    <p>Superior thyroid artery</p> Signup and view all the answers

    Which muscles can cause neck contralateral rotation when they contract unilaterally?

    <p>Anterior scalene</p> Signup and view all the answers

    What originates from the superior part of the anterior surface of the manubrium sterni?

    <p>Sternal head of the pectoralis major</p> Signup and view all the answers

    Where does the posterior scalene muscle insert?

    <p>External surface of rib 2</p> Signup and view all the answers

    Which spinal nerves are involved in the blood supply to the scalene muscles?

    <p>C6-C8</p> Signup and view all the answers

    What is the primary function of the trapezius muscle's descending part?

    <p>Scapular elevation</p> Signup and view all the answers

    Which part of the trapezius muscle has its origin from the spinous processes of vertebrae T1-T4?

    <p>Transverse part</p> Signup and view all the answers

    What is the insertion point of the clavicular head of the pectoralis major?

    <p>Lateral surface of mastoid process</p> Signup and view all the answers

    Which artery is associated with the blood supply to the pectoralis minor muscle?

    <p>Thoracoacromial artery</p> Signup and view all the answers

    Study Notes

    Facet Joints

    • Synovial Joints

    Intervertebral Discs

    • Cartilaginous Joints

    Thoracic Spine Movement

    • Rotation
    • Lateral Flexion (Side Bending)

    Facet Joint Blood Supply

    • Segmental Arteries

    Ligaments Associated with Facet Joints and Intervertebral Discs

    • Ligamenta Flava
    • Interspinous Ligaments
    • Supraspinous Ligaments
    • Intertransverse Ligaments

    True Ribs

    • Ribs 1 - 7

    Costal Cartilage and Manubrium

    • Synovial Joint

    False Ribs

    • Ribs 8-10

    1st Costal Cartilage Attachment

    • Manubrium

    Chest Wall Layers

    • 3

    Thoracic Cage Hinge

    • Manubriosternal Joint

    Sternochondral Joints (2-7)

    • Synovial Joints

    Bony Chest Wall Structure

    • Scapula (Shoulder Blade)

    Manubriosternal Joint

    • Secondary Cartilaginous (Symphysis)

    Xiphisternal Joint Ligaments

    • Xiphisternal Ligaments

    True Rib Movement

    • 2

    Rib Without Tubercle

    • Rib 1

    Sternochondral Joint 1 Movement

    • Only 10 Degrees

    Typical Rib Characteristics

    • Articulate with the Transverse Process of the Vertebrae

    Xiphisternal Joint

    • Symphysis (Secondary Cartilaginous Joint)

    Unique Rib 1 Characteristics

    • Short
    • Strong
    • Flat
    • Tubercle for Scalenus Anterior

    Clavicle and Manubrium Elevation Joint

    • Sternoclavicular Joint

    Descending Muscle Function

    • Does not perform Elevation

    Ascending Muscle Blood Supply

    • Suprascapular Artery

    Contralateral Head Rotation

    • Atlantoaxial Joint

    Anteroinferior Scapula Drawing

    • Inferior Fibers

    Bilateral Muscle Contraction

    • Protraction (Drawing Scapula Forward)

    Inferior Pectoral and Deltoid Action

    • Does not facilitate Rotation

    Scapulothoracic Joint

    • Does not facilitate Rotation

    Suprapleural Membrane Attachment

    • First Rib and Transverse Process

    Anterior Scalene Innervation

    • C4-C6

    Posterior Scalene Muscle Function

    • Elevation of the First Rib
    • Tilting of the Neck

    Thoracic Inlet Compression

    • Thoracic Outlet Syndrome

    Superior Thyroid Gland Blood Supply

    • Superior Thyroid Artery

    Contralateral Neck Rotation

    • Scalene Muscles
    • Sternocleidomastoid Muscle

    Manubrium Sterni Origin

    • Sternothyroid Muscle

    Posterior Scalene Muscle Insertion

    • Second Rib

    Scalene Muscle Blood Supply

    • Cervical Nerves C3-C8

    Trapezius Muscle (Descending Part) Function

    • Depression of the Scapula (Pulling Down)

    Trapezius Muscle (Descending Part) Origin

    • Spinous Process of Vertebrae T1-T4

    Pectoralis Major (Clavicular Head) Insertion

    • Lateral Lip of the Intertubercular Groove of the Humerus

    Pectoralis Minor Blood Supply

    • Thoracic Acromial Artery

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    Description

    Test your knowledge on thoracic anatomy and the classification of various joints in the region. This quiz covers the facet joints, intervertebral discs, true ribs, and associated ligaments. Challenge yourself to understand how these structures interact within the thoracic cage.

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