Upper Extremity Bones- Asynch 5
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Questions and Answers

Which two projections on the ulna form the walls of the trochlear notch?

  • Coronoid process and radial notch
  • Olecranon and coronoid processes (correct)
  • Olecranon and supinator crest
  • Olecranon and radial notch

    • What is the rounded concavity on the lateral side of the coronoid process called?

  • Supinator fossa
  • Radial notch (correct)
  • Supinator crest
  • Tuberosity

    • What is the prominent ridge on the lateral surface of the ulnar shaft called?

  • Tuberosity
  • Supinator fossa
  • Radial notch
  • Supinator crest (correct)

    • What is the concavity between the supinator crest and the distal part of the coronoid process called?

    <p>Supinator fossa</p> Signup and view all the answers

    Which carpal bone is the largest in the proximal row?

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

    What converts the carpal arch into the carpal tunnel?

    <p>Flexor retinaculum</p> Signup and view all the answers

    How many tendons and a nerve pass through the carpal tunnel?

    <p>Nine tendons and a nerve</p> Signup and view all the answers

    How many phalanges does the thumb have?

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

    What are the three bones that make up each digit?

    <p>Proximal, middle, and distal phalanges</p> Signup and view all the answers

    What is the name of the hook-like structure on the palmar surface of the hamate?

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

    Which bone lies on the posterolateral aspect of the thorax, overlying the 2nd-7th ribs?

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

    Which bone has a prominent conoid tubercle near its acromial end close to the trapezoid line?

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

    Which bone does the subclavian muscle attach to?

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

    Which bone has a lateral lip and a medial lip associated with the intertubercular sulcus?

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

    Which bone has a shallow sulcus known as the radial groove on its posterior surface?

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

    Which bone has a deltoid tuberosity located laterally on its body?

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

    The head of the radius articulates with the..

    <p>lateral capitulum</p> Signup and view all the answers

    What is the shape of the clavicle bone?

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

    Which part of the clavicle bone is toward the scapula?

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

    Which bones make up the axial skeleton?

    <p>Skull, hyoid, vertebrae, ribs, sternum, ear ossicles</p> Signup and view all the answers

    Which bones make up the appendicular skeleton?

    <p>All of the above</p> Signup and view all the answers

    Which bones make up the upper limb?

    <p>Humerus, radius, ulna, carpal bones, metacarpal bone, phalanges</p> Signup and view all the answers

    Which bones make up the pelvic girdle?

    <p>Ilium, ischium, Pubis</p> Signup and view all the answers

    Which bones make up the shoulder girdle?

    <p>Clavicle, scapula</p> Signup and view all the answers

    Capitulum of humerus articulates with the ___ of radius

    Signup and view all the answers

    The conoid tubercle lies near the ____ end of the clavicle

    Signup and view all the answers

    The ulnar notch is located at the..

    <p>Distal end of radius</p> Signup and view all the answers

    The tuberosity of the ulna lies...

    <p>Inferior to coronoid process</p> Signup and view all the answers

    The rounded concavity on the lateral side of the coronoid process is the __________

    Signup and view all the answers

    If a joint doesn't have 2 degrees of freedom or more, it cannot perform circumduction

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

    The radiocarpal joint is also known as the ____

    Signup and view all the answers

    Which carpal bone is the biggest and the most fractured?

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

    Which nerves passes through the carpal Tunnel?

    <p>Median Nerve</p> Signup and view all the answers

    Study Notes

    Anatomy of the Ulna and Carpals

    • Trochlear notch is bordered by the olecranon and coronoid processes of the ulna.
    • The rounded concavity on the lateral side of the coronoid process is the radial notch.
    • The prominent ridge on the lateral surface of the ulnar shaft is known as the lateral border.
    • The concavity between the supinator crest and distal part of the coronoid process is called the supinator fossa.

    Carpal Bones

    • The largest carpal bone in the proximal row is the scaphoid.
    • The carpal tunnel is formed by the flexor retinaculum, converting the carpal arch.
    • The carpal tunnel allows passage for 9 tendons and the median nerve.
    • All fingers have three phalanges, however, the thumb has only two.

    Bones and Features of the Upper Limb

    • Each digit is composed of three bones: proximal phalanx, middle phalanx, and distal phalanx.
    • The hook-like structure on the palmar surface of the hamate bone is called the hamulus.
    • The scapula covers the posterolateral aspect of the thorax, overlying the 2nd to 7th ribs.
    • The clavicle features a prominent conoid tubercle near its acromial end, close to the trapezoid line.

    Muscle Attachments and Bone Structures

    • The subclavian muscle attaches to the clavicle.
    • The humerus has a lateral lip and a medial lip associated with the intertubercular sulcus.
    • The humerus also features a radial groove on its posterior surface.
    • The deltoid muscle attaches at the deltoid tuberosity located laterally on the humerus body.

    Joint Articulations

    • The head of the radius articulates with the capitulum of the humerus.
    • The shape of the clavicle is S-shaped (also described as a double curve).
    • The medial end of the clavicle is directed toward the scapula.

    Skeleton Composition

    • The axial skeleton includes the skull, vertebral column, and rib cage.
    • The appendicular skeleton consists of bones of the limbs and girdles.
    • The upper limb is comprised of the humerus, radius, ulna, carpals, metacarpals, and phalanges.
    • The pelvic girdle is made up of the two hip bones (ossa coxae) and sacrum.
    • The shoulder girdle is formed by the clavicle and scapula.

    Additional Bone Features

    • The conoid tubercle is located near the acromial end of the clavicle.
    • The ulnar notch is found at the distal end of the ulna.
    • The tuberosity of the ulna is situated superiorly toward the elbow.
    • The rounded concavity on the lateral side of the coronoid process serves as a surface for radius articulation.

    Joints and Fractures

    • A joint lacking at least two degrees of freedom cannot perform circumduction.
    • The radiocarpal joint is also termed the wrist joint.
    • The scaphoid is notably the largest and most commonly fractured carpal bone.
    • The median nerve passes through the carpal tunnel, alongside the tendon structures.

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    Related Documents

    BMS MSK Asynchronous Lecture 5 student.pptx

    Description

    Test your knowledge of the bones of the upper extremity with this anatomy quiz. Explore the key concepts from Moore's Clinically Oriented Anatomy and challenge yourself with questions on the bones of the upper limb. Perfect for medical students and anatomy enthusiasts.

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