BMS Anatomy Lecture 10: Elbow, Radioulnar, and Hand Joints
118 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of joint is the elbow joint?

  • Saddle joint
  • Ball and socket joint
  • Condyloid joint
  • Hinge joint (correct)

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

  • Radial collateral and ulnar collateral ligaments (correct)
  • Lateral and medial meniscus ligaments
  • Pectoral and deltoid ligaments
  • Coronoid and olecranon ligaments

In the elbow complex, which bony articulation involves the trochlea of the humerus?

  • Humero-ulnar (correct)
  • Radio-ulnar
  • Humero-radial
  • Capitulum-humeri

What movements are permitted by the typical 'elbow' joint?

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

Which part of the humerus has the trochlea and capitulum as articular surfaces?

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

How many degrees of freedom does the elbow joint typically have?

<p>One degree of freedom (D)</p> Signup and view all the answers

Which ligament becomes taut during wrist flexion at the radiocarpal joint?

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

What type of movement at the radiocarpal joint involves the collateral ligaments?

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

In wrist flexion at the radiocarpal joint, which ligament relaxes?

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

What is the role of the ulno-carpal ligament in wrist movement at the radiocarpal joint?

<p>Relaxes during wrist flexion (C)</p> Signup and view all the answers

Which muscle group is primarily involved in wrist flexion and extension?

<p>Flexor Carpi Ulnaris and Flexor Carpi Radialis (A)</p> Signup and view all the answers

What is the axis of abduction and adduction motions at the radiocarpal joint?

<p>Through the head of the capitate (D)</p> Signup and view all the answers

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

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

Which of the following describes the primary motion of the carpometacarpal (CMC) joint of the thumb?

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

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

<p>Flexor Carpi Radialis (C)</p> Signup and view all the answers

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

<p>It is a hinge joint. (A)</p> Signup and view all the answers

Which of the following muscles is involved in wrist extension but NOT in wrist abduction?

<p>Extensor Digiti Minimi (C)</p> Signup and view all the answers

Which of the following statements about the carpometacarpal (CMC) joint of the thumb is true?

<p>The joint surface of the 1st metacarpal is convex, and the joint surface of the trapezium is concave. (D)</p> Signup and view all the answers

Which of the following muscles are responsible for flexion of digits 2 to 5?

<p>Flexor digitorum superficialis, flexor digitorum profundus, lumbricals, dorsal interossei (D)</p> Signup and view all the answers

What is the range of motion (ROM) for flexion of the proximal interphalangeal (PIP) joint of the fingers?

<p>120 degrees (C)</p> Signup and view all the answers

Which muscle group is responsible for adduction of digits 2 to 5?

<p>Palmar interossei (C)</p> Signup and view all the answers

What is the range of motion (ROM) for hyperextension of the thumb interphalangeal (IP) joint?

<p>5-10 degrees (D)</p> Signup and view all the answers

Which of the following is NOT an extrinsic muscle acting on the digits?

<p>Adductor pollicis (D)</p> Signup and view all the answers

In what position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?

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

Which of the following statements about the glenohumeral (shoulder) joint is correct?

<p>Approximately two-thirds of the humeral head fits into the glenoid fossa. (A)</p> Signup and view all the answers

What is the primary function of the glenoid labrum in the glenohumeral joint?

<p>To deepen the glenoid cavity and improve congruence. (C)</p> Signup and view all the answers

Which of the following axes controls the rotational movements of the glenohumeral joint?

<p>Vertical axis (C)</p> Signup and view all the answers

Which of the following structures is closely related to the glenohumeral joint and may be damaged during dislocation?

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

Which of the following statements about the joint capsule of the glenohumeral joint is correct?

<p>It is relatively loose, permitting free movements. (A)</p> Signup and view all the answers

Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?

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

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

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

How many degrees of freedom (DOF) do the metacarpophalangeal (MCP) joints have?

<p>2 DOF (A)</p> Signup and view all the answers

When the MCP joint is in 90 degrees of flexion, what is the state of the collateral ligaments?

<p>Taut (C)</p> Signup and view all the answers

What is the range of motion (ROM) for abduction and adduction of the metacarpophalangeal (MCP) joints?

<p>20 degrees (C)</p> Signup and view all the answers

Which of the carpometacarpal (CMC) joints has the greatest range of motion?

<p>5th CMC joint (A)</p> Signup and view all the answers

What is the range of motion (ROM) for hyperextension of the metacarpophalangeal (MCP) joints?

<p>0 degrees (C)</p> Signup and view all the answers

What is the range of motion (ROM) for flexion of the proximal interphalangeal (PIP) joint of the fingers?

<p>$120^{\circ}$ (C)</p> Signup and view all the answers

In what position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?

<p>In semiflexion (D)</p> Signup and view all the answers

Which muscle group is responsible for adduction of digits 2 to 5?

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

Which of the following muscles are responsible for flexion of digits 2 to 5?

<p>Flexor digitorum superficialis and flexor digitorum profundus (B)</p> Signup and view all the answers

What is the range of motion (ROM) for hyperextension of the thumb interphalangeal (IP) joint?

<p>$5^{\circ} - 10^{\circ}$ (B)</p> Signup and view all the answers

What is the primary function of the transverse humeral ligament?

<p>To convert the intertubercular groove into a canal for the long head of the biceps tendon (A)</p> Signup and view all the answers

What is the primary function of the coracoacromial arch?

<p>To prevent superior displacement of the humeral head from the glenoid cavity (D)</p> Signup and view all the answers

What is the primary function of the bursae around the shoulder joint?

<p>To decrease friction between tendons/muscles and the joint capsule (D)</p> Signup and view all the answers

What is the primary function of the glenohumeral ligaments?

<p>To provide structural support to the shoulder joint capsule (B)</p> Signup and view all the answers

Where is the long head of the biceps tendon positioned within the shoulder joint?

<p>Within the joint capsule, passing through the intertubercular groove (A)</p> Signup and view all the answers

What is the primary function of the coracohumeral ligament?

<p>To connect the coracoid process to the greater tubercle of the humerus (D)</p> Signup and view all the answers

What is the primary role of the Scapulothoracic Joint?

<p>Increases arm ROM at the Shoulder joint (B)</p> Signup and view all the answers

Which movement will result in changes at both the acromioclavicular and sternoclavicular joints?

<p>Adduction of the Scapula (D)</p> Signup and view all the answers

What provides Glenohumeral stability for overhead work?

<p>Scapulothoracic Joint (C)</p> Signup and view all the answers

What is the main function of the Scapulothoracic Joint in relation to the Humerus?

<p>Offers a movable base for the Humerus, enhancing arm ROM at shoulder joint (B)</p> Signup and view all the answers

What is the significance of muscles attached to the scapula with regards to shoulder movements?

<p>Produce movements that are dependent on acromioclavicular and sternoclavicular articulations (B)</p> Signup and view all the answers

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

<p>Flexor Carpi Radialis (D)</p> Signup and view all the answers

Which motion at the carpometacarpal (CMC) joint of the thumb involves rotation of the 1st metacarpal on the trapezium?

<p>Opposition (C)</p> Signup and view all the answers

What is the primary function of the joint capsule at the carpometacarpal (CMC) joint of the thumb?

<p>It is thick, but loose to allow a wide range of motion (B)</p> Signup and view all the answers

Which of the following motions is NOT permitted at the carpometacarpal (CMC) joint of the thumb?

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

Which of the following muscles acts as a synergist for both wrist flexion and wrist abduction?

<p>Flexor Carpi Radialis (A)</p> Signup and view all the answers

Which of the following statements about the articular surfaces of the carpometacarpal (CMC) joint of the thumb is correct?

<p>The surfaces have both convex and concave characteristics (D)</p> Signup and view all the answers

Which of the following muscles is responsible for extension of the digits 2 to 5?

<p>Extensor digitorum (D)</p> Signup and view all the answers

Which of the following muscle groups is responsible for abduction of digits 2 to 5?

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

What is the range of motion (ROM) for flexion of the metacarpophalangeal (MCP) joint of the thumb?

<p>45 - 60 degrees (D)</p> Signup and view all the answers

Which of the following muscles is responsible for opposition of the thumb?

<p>Opponens pollicis (D)</p> Signup and view all the answers

Which of the following statements about the intrinsic muscles of the hand is true?

<p>The lumbricals are responsible for flexion of digits 2 to 5. (D)</p> Signup and view all the answers

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

<p>Flexor carpi radialis (B)</p> Signup and view all the answers

What is the primary purpose of the articular disc in the inferior radio-ulnar joint?

<p>To bind the radius and ulna together and separate different joints (C)</p> Signup and view all the answers

Which ligament provides support to the middle radioulnar joint?

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

How is the middle radioulnar joint defined in terms of movement?

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

What is the function of the thickening of the capsule as palmar (anterior) and posterior or dorsal radioulnar ligaments?

<p>To support the joint anteriorly and posteriorly (D)</p> Signup and view all the answers

Which muscles are responsible for Supination and Pronation movements at the forearm?

<p>Supinator &amp; Pronator teres (A)</p> Signup and view all the answers

What is the degree of movement for Pronation compared to Supination at the radio-ulnar joints?

<p>$90^\circ$ Pronation, $80^\circ$ Supination (B)</p> Signup and view all the answers

What is the primary function of the glenoid labrum in the glenohumeral joint?

<p>To widen the glenoid cavity and increase congruence with the humeral head (D)</p> Signup and view all the answers

Which of the following structures is closely related to the glenohumeral joint and may be damaged during dislocation?

<p>Axillary nerve (D)</p> Signup and view all the answers

Which of the following axes controls the rotational movements of the glenohumeral joint?

<p>Vertical axis (C)</p> Signup and view all the answers

Which of the following statements about the joint capsule of the glenohumeral joint is correct?

<p>It is least supported inferiorly, making dislocation more likely in that direction (C)</p> Signup and view all the answers

Which of the following statements about the articular surfaces of the glenohumeral joint is correct?

<p>The head of the humerus is much larger than the glenoid cavity (D)</p> Signup and view all the answers

Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?

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

Which of the following joints is a physiological joint with no true articulation?

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

Which of the following statements accurately describes the role of the scapulothoracic joint?

<p>All of the above. (D)</p> Signup and view all the answers

Which of the following statements regarding the relationship between the scapulothoracic joint and other shoulder joints is correct?

<p>Any movement at the scapulothoracic joint will result in movement at both the acromioclavicular and sternoclavicular joints. (A)</p> Signup and view all the answers

Which of the following muscles is responsible for abduction of the thumb?

<p>Abductor pollicis longus and Abductor pollicis brevis (D)</p> Signup and view all the answers

Which of the following muscles is responsible for opposition of the thumb?

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

Which of the following muscle groups is responsible for flexion of digits 2 to 5?

<p>Flexor digitorum profundus and Flexor digitorum superficialis (B)</p> Signup and view all the answers

After reaching 90° abduction, the movement of the upper limb:

<p>Brings the upper limb closer to the sagittal plane (C)</p> Signup and view all the answers

In the position of reference, adduction of the shoulder joint is possible when combined with:

<p>Extension and flexion (D)</p> Signup and view all the answers

Which of the following statements about the subacromial bursa is correct?

<p>It may become inflamed and swollen, leading to impingement (A)</p> Signup and view all the answers

The movement of abduction takes place in which plane?

<p>Frontal plane (D)</p> Signup and view all the answers

What is the maximum angle of abduction that can be achieved at the shoulder joint?

<p>180° (C)</p> Signup and view all the answers

Which bursa is located between the deltoid and the fibrous capsule?

<p>Subdeltoid bursa (D)</p> Signup and view all the answers

Which of the following muscle groups is responsible for wrist adduction?

<p>Flexor Carpi Ulnaris and Extensor Carpi Ulnaris (C)</p> Signup and view all the answers

Which of the following motions is permitted at the carpometacarpal (CMC) joint of the thumb?

<p>Rotation of the 1st metacarpal on the trapezium (B)</p> Signup and view all the answers

Which muscle group is responsible for wrist abduction?

<p>Flexor Carpi Radialis, Extensor Carpi Radialis Longus, and Extensor Carpi Radialis Brevis (B)</p> Signup and view all the answers

Which of the following muscles is primarily responsible for opposition of the thumb?

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

Which of the following statements about the carpometacarpal (CMC) joint of the thumb is correct?

<p>It is a saddle joint with 3 degrees of freedom (B)</p> Signup and view all the answers

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

<p>Flexor Carpi Radialis (B)</p> Signup and view all the answers

What is the primary function of the radial collateral ligament in the elbow complex?

<p>Provide side-to-side stability to prevent varus-valgus stress (D)</p> Signup and view all the answers

Which ligament reinforces the distal part of the joint capsule of the elbow complex to provide additional support?

<p>Annular ligament (C)</p> Signup and view all the answers

In the elbow complex, what is the primary function of the trochlea of the humerus?

<p>Participate in the formation of the humero-ulnar joint for flexion and extension (B)</p> Signup and view all the answers

Which joint within the elbow complex permits rotational movements of the forearm?

<p>Proximal radio-ulnar joint (B)</p> Signup and view all the answers

What anatomical structure primarily limits hyperextension at the elbow joint?

<p>Olecranon process of ulna (A)</p> Signup and view all the answers

Which ligament in the elbow complex is most crucial for preventing abduction-adduction movements?

<p>Ulnar collateral ligament (A)</p> Signup and view all the answers

Which joint provides a movable base for the humerus, increasing the range of motion at the shoulder joint?

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

Which muscle group is primarily responsible for abduction of the thumb?

<p>Abductor pollicis longus and abductor pollicis brevis (B)</p> Signup and view all the answers

Which of the following statements about the joint capsule of the glenohumeral joint is correct?

<p>It is reinforced by the coracohumeral ligament, which provides stability to the joint. (D)</p> Signup and view all the answers

Which muscle is primarily responsible for opposition of the thumb?

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

Which of the following movements of the glenohumeral joint is controlled by the antero-posterior axis?

<p>Abduction and adduction (D)</p> Signup and view all the answers

What is the primary function of the glenoid labrum in the glenohumeral joint?

<p>To increase the depth of the glenoid fossa and provide stability to the joint. (A)</p> Signup and view all the answers

What is the range of passive flexion for the elbow joint?

<p>160° (D)</p> Signup and view all the answers

Which of the following structures forms a part of the proximal radio-ulnar joint?

<p>Both the radial notch of the ulna and the annular ligament (D)</p> Signup and view all the answers

What is the range of extension for the elbow joint from the position of reference (C)?

<p>0° (B)</p> Signup and view all the answers

Which of the following statements about the head of the radius is correct?

<p>All of the above. (D)</p> Signup and view all the answers

What type of joint is the proximal radio-ulnar joint?

<p>A synovial pivot joint (A)</p> Signup and view all the answers

Which of the following statements about the movement at the proximal radio-ulnar joint is correct?

<p>It allows rotation about the axis of the two cylindrical surfaces in contact. (C)</p> Signup and view all the answers

Which intrinsic muscle group is responsible for abduction of the little finger (digit 5)?

<p>Abductor digiti minimi (A)</p> Signup and view all the answers

Which extrinsic muscle primarily extends the interphalangeal joints of the thumb?

<p>Extensor pollicis brevis (C)</p> Signup and view all the answers

Which muscle group is responsible for flexion of the metacarpophalangeal (MCP) joint of the thumb?

<p>Flexor pollicis brevis (B)</p> Signup and view all the answers

What is the range of motion (ROM) for extension of the distal interphalangeal (DIP) joints of the fingers?

<p>0 degrees (D)</p> Signup and view all the answers

Which muscle group is primarily responsible for adduction of digits 2 to 5?

<p>Palmar interossei (D)</p> Signup and view all the answers

In which position of the metacarpophalangeal (MCP) joint of the thumb can abduction/adduction occur?

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

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser