BMS Anatomy Lecture 10 Quiz: Elbow, Radioulnar, and Hand Joints
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Questions and Answers

What is the purpose of the contraction in both the elbow flexors and the triceps brachii?

  • To increase the range of motion in the elbow joint
  • To stabilize the elbow and not waste energy in elbow movement (correct)
  • To stabilize the proximal attachments of the dynamometer finger and wrist muscles
  • To produce a tension proportionate to the amount of force at the fist

    • What is the primary movement permitted by the synovial hinge joint of the elbow?

  • Flexion and extension (correct)
  • Adduction
  • Abduction
  • Rotation

    • Which ligaments contribute to the strength of the elbow joint?

  • Femoral ligaments
  • Pectoral ligaments
  • Radial collateral and ulnar collateral ligaments (correct)
  • Patellar ligaments

    • Which of the following best describes the radio-carpal joint?

    <p>A joint between the distal end of radius, disc of the distal radiocapal joint, and the proximal row of carpal bones</p> Signup and view all the answers

    How many bony articulations are contained within the elbow complex?

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

    What type of joint is the radio-carpal joint?

    <p>Condyloid (ellipsoid) joint</p> Signup and view all the answers

    What is the purpose of the collateral ligaments of the radio-carpal joint?

    <p>To provide stability and limit the range of motion in the radio-carpal joint</p> Signup and view all the answers

    Which part of the humerus articulates with the head of the radius in the elbow complex?

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

    What is the purpose of the mid-carpal joint?

    <p>To connect the proximal and distal rows of carpal bones</p> Signup and view all the answers

    What is the range of movement permitted by the elbow joint?

    <p>Flexion and extension</p> Signup and view all the answers

    What is the purpose of the intercarpal joints?

    <p>To facilitate a group of small synovial planar joints between the proximal or distal carpal bones</p> Signup and view all the answers

    Which part of the ulna articulates with the trochlea of the humerus in the elbow complex?

    <p>Coronoid process</p> Signup and view all the answers

    Where does the trochlear notch of the ulna articulate?

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

    Which structure receives the olecranon process?

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

    What joint cavity do the capsule invests in a single anatomical cavity?

    <p>True elbow joint and superior radioulnar joint</p> Signup and view all the answers

    Where is the axis of motion located in relation to the humerus?

    <p>Distal to the epicondyles of the humerus</p> Signup and view all the answers

    What is the function of the carrying angle?

    <p>Facilitates arm movement without hip contact</p> Signup and view all the answers

    Why do women typically have a more pronounced carrying angle?

    <p>Because of a wider pelvic girdle in women</p> Signup and view all the answers

    What is the typical range of motion for the 5th carpometacarpal (CMC) joint?

    <p>25 to 30 degrees of motion</p> Signup and view all the answers

    What is the primary function of the collateral ligaments of the metacarpophalangeal (MCP) joints?

    <p>To attach the heads of the metacarpals to the bases of the phalanges</p> Signup and view all the answers

    What is the total range of motion in the MCP joints for abduction and adduction of the fingers?

    <p>20 degrees each for abduction and adduction</p> Signup and view all the answers

    How many interphalangeal (IP) joints are present in the digits II-V?

    <p>2 IP joints per digit</p> Signup and view all the answers

    What is the typical range of motion for the 4th carpometacarpal (CMC) joint?

    <p>10 to 15 degrees of dorso-volar movement</p> Signup and view all the answers

    What is the typical range of motion for the 2nd and 3rd carpometacarpal (CMC) joints?

    <p>2 degrees or less of motion</p> Signup and view all the answers

    Which of the following muscles is NOT involved in wrist flexion?

    <p>Extensor Carpi Radialis Longus</p> Signup and view all the answers

    Which of the following muscles is responsible for both wrist extension and abduction?

    <p>Extensor Carpi Radialis Brevis</p> Signup and view all the answers

    What is the primary motion allowed by the carpometacarpal (CMC) joint of the thumb?

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

    Which of the following statements about the CMC joint of the thumb is NOT true?

    <p>The joint capsule is thin and tight</p> Signup and view all the answers

    Which muscle is primarily responsible for wrist adduction?

    <p>Flexor Carpi Ulnaris</p> Signup and view all the answers

    Which of the following muscles is involved in both wrist extension and abduction?

    <p>Both B and D</p> Signup and view all the answers

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