Upper Limb Anatomy Quiz
78 Questions
12 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

Which muscle is responsible for abduction of the glenohumeral joint?

  • Teres minor
  • Infraspinatus
  • Subscapularis
  • Supraspinatus (correct)

    • What is the insertion point of the teres major muscle?

  • Middle facet of the greater tubercle
  • Uppermost facet of the greater tubercle
  • Lesser tubercle
  • Crest of the lesser tubercle (correct)

    • Which action is primarily performed by the pectoralis major on the glenohumeral joint?

  • External rotation
  • Adduction and internal rotation (correct)
  • Abduction
  • Extension

    • The infraspinatus is important for which function at the glenohumeral joint?

    <p>External rotation</p> Signup and view all the answers

    From which anatomical location does the subscapularis muscle originate?

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

    What is the primary role of the acromioclavicular ligament?

    <p>To stabilize the clavicle's distal end with the acromion</p> Signup and view all the answers

    Which ligament is responsible for connecting the first rib cartilage to the clavicle?

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

    What potential problem arises from a decrease in the size of the subacromial space?

    <p>Impingement of the subscapularis tendon</p> Signup and view all the answers

    Which of the following ligaments connects the clavicle to the coracoid process?

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

    What is the overall function of the sternoclavicular joint ligaments?

    <p>To stabilize the clavicle with the sternum</p> Signup and view all the answers

    What is the primary function of the coracohumeral ligament?

    <p>To stabilize the glenohumeral joint</p> Signup and view all the answers

    Which ligament primarily prevents excessive humeral dislocation during abduction?

    <p>Inferior glenohumeral ligament</p> Signup and view all the answers

    How does the subacromial bursa function in relation to the subscapularis tendon?

    <p>It creates a cushion between the subscapularis tendon and the acromion</p> Signup and view all the answers

    What role does the scapulothoracic joint play in shoulder movement?

    <p>It enables movement of the scapula relative to the thoracic cage</p> Signup and view all the answers

    What is the origination point of the long head of the biceps brachii?

    <p>Supraglenoid tubercle of the scapula</p> Signup and view all the answers

    Which muscle assists in preventing superior dislocation of the humeral head during abduction?

    <p>Long head of the biceps brachii</p> Signup and view all the answers

    What is the effect of tearing the inferior glenohumeral ligament?

    <p>Increased risk of shoulder instability</p> Signup and view all the answers

    In what location does the radial tuberosity of the radius exist?

    <p>On the medial surface of the radius</p> Signup and view all the answers

    Which muscle is primarily responsible for flexion of the distal interphalangeal joint of the second through fifth digits?

    <p>Flexor digitorum profundus</p> Signup and view all the answers

    What is the primary function of the pronator quadratus muscle?

    <p>Pronation of the forearm</p> Signup and view all the answers

    Which statement accurately describes the role of extensor-supinator muscles?

    <p>They function mainly for extension and supination.</p> Signup and view all the answers

    Which muscle originates from the anterior surface of the radius and performs flexion of the first digit?

    <p>Flexor pollicis longus</p> Signup and view all the answers

    How do extensor tendons behave in relation to the extensor retinaculum?

    <p>They are kept in place by it.</p> Signup and view all the answers

    Which muscle performs both pronation and flexion of the arm?

    <p>Pronator teres</p> Signup and view all the answers

    What structures keep the tendons of most flexor muscles in place on the palmar side of the wrist?

    <p>Palmar carpal ligament</p> Signup and view all the answers

    Which of the following muscles is part of the intermediate layer of the flexor-pronator muscles?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    What is the primary insertion point for the flexor carpi ulnaris muscle?

    <p>Pisiform bone and hook of the hamate</p> Signup and view all the answers

    Which muscle is responsible for internal rotation at the glenohumeral joint?

    <p>Latissimus dorsi</p> Signup and view all the answers

    What action is predominantly performed by the flexor carpi radialis muscle?

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

    Which two muscles are involved in the process of forearm supination?

    <p>Biceps brachii and Supinator</p> Signup and view all the answers

    Which muscle originates from the spinous process of T6 and contributes to scapular depression?

    <p>Latissimus dorsi</p> Signup and view all the answers

    Which of the following muscles are classified as extrinsic flexor-pronators of the hand?

    <p>Flexor carpi ulnaris</p> Signup and view all the answers

    Which group of muscles does NOT include any intrinsic muscles of the hand?

    <p>Flexor digitorum superficialis</p> Signup and view all the answers

    What type of muscle are the palmar intraossei muscles classified as?

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

    Which function do lumbrical muscles primarily contribute to?

    <p>Flexion of the metacarpophalangeal joints and extension of the proximal interphalangeal joints</p> Signup and view all the answers

    How many total extrinsic extensor-supinators of the hand are there?

    <p>9</p> Signup and view all the answers

    Which muscle originates from the transverse process of the upper cervical vertebrae and performs elevation of the scapula?

    <p>Levator scapulae</p> Signup and view all the answers

    What action is primarily performed by the trapezius muscle?

    <p>Adduction and downward rotation of the scapula</p> Signup and view all the answers

    Which muscle inserts into the deltoid tuberosity of the humerus?

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

    What is a key function of the pectoralis minor muscle?

    <p>Ventral tilt of the scapula and elevation of the second to fifth ribs</p> Signup and view all the answers

    Which of the following statements incorrectly describes the function of the rhomboid muscles?

    <p>They perform upward rotation of the scapula.</p> Signup and view all the answers

    What type of joint is the scapulohumeral joint classified as?

    <p>Ball and socket joint</p> Signup and view all the answers

    What is the angle formed between the head of the humerus and the shaft?

    <p>135-140°</p> Signup and view all the answers

    Which anatomical feature aids in stabilizing the glenohumeral joint?

    <p>Glenoid labrum</p> Signup and view all the answers

    How does the size of the glenoid cavity compare to the head of the humerus?

    <p>It covers only a quarter of the head's size.</p> Signup and view all the answers

    What is the primary action of the flexor digitorum profundus muscle?

    <p>Flexion of the distal interphalangeal joint</p> Signup and view all the answers

    Which of the following ligaments is NOT part of the glenohumeral joint?

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

    What is the primary function of the humeral canal?

    <p>Serves as a passage for muscle tendons</p> Signup and view all the answers

    Which muscle is responsible for pronation of the forearm?

    <p>Pronator quadratus</p> Signup and view all the answers

    In which direction does the glenoid cavity primarily point?

    <p>Anteriorly, laterally, and slightly superiorly</p> Signup and view all the answers

    Where does the extensor-supinator muscle group primarily originate?

    <p>Posterior aspect of the forearm</p> Signup and view all the answers

    How do extensor tendons compare to flexor tendons in terms of their location?

    <p>Extensor tendons are dorsal while flexor tendons are palmar</p> Signup and view all the answers

    What role do the two tubercles of the humerus play?

    <p>They serve as sites for muscle attachments.</p> Signup and view all the answers

    What role does the extensor retinaculum play in relation to extensor-supinator muscles?

    <p>Keeps extensor tendons in place</p> Signup and view all the answers

    Which ligament is primarily responsible for limiting over flexion of the wrist?

    <p>Dorsal radiocarpal ligament</p> Signup and view all the answers

    Which ligament connects the ulna with the lunate bone?

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

    What is the primary role of the palmar radiocarpal ligament?

    <p>Limit wrist extension</p> Signup and view all the answers

    During which movement is the radial collateral ligament primarily stretched?

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

    Which structure limits over abduction of the wrist?

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

    Which two bones are connected by the scapho-lunate ligament?

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

    What is a characteristic of the posterior (dorsal) ligamentous complex?

    <p>It limits over flexion of the wrist</p> Signup and view all the answers

    Which of the following ligaments is involved in connecting the radius with the triquetrum bone?

    <p>Dorsal radiocarpal ligament</p> Signup and view all the answers

    What is the primary action of the Pronator Teres?

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

    Which muscle originates from the lateral epicondyle of the humerus and is responsible for extending the fifth digit?

    <p>Extensor digiti minimi</p> Signup and view all the answers

    Which of the following muscles performs independent extension of the second digit?

    <p>Extensor indicis</p> Signup and view all the answers

    Which muscle is responsible for the abduction of the thumb?

    <p>Abductor pollicis longus</p> Signup and view all the answers

    What is the insertion point of the extensor carpi radialis longus muscle?

    <p>Base of the second metacarpal bone</p> Signup and view all the answers

    Which muscle originates from the posterior surface of the distal third of the ulna?

    <p>Extensor indicis</p> Signup and view all the answers

    Which action does the extensor carpi ulnaris perform?

    <p>Adduction and extension of the hand</p> Signup and view all the answers

    Which muscle acts to supinate the forearm?

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

    Which muscle inserts into the dorsal base of the proximal phalanx of the first digit?

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

    Which muscle primarily contributes to the extension of the digits at the metacarpophalangeal and interphalangeal joints?

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

    What is the main role of the ligaments associated with the sternoclavicular joint?

    <p>To limit movement of the clavicle with the sternum</p> Signup and view all the answers

    What distinguishes the acromioclavicular ligament in relation to shoulder stability?

    <p>It stabilizes the connection between the clavicle and the acromion</p> Signup and view all the answers

    Which anatomical location does the trapezoid ligament primarily connect?

    <p>Coracoid process to the acromial end of the clavicle</p> Signup and view all the answers

    What occurs as a result of decreased size in the subacromial area?

    <p>Subscapularis tendon impingement</p> Signup and view all the answers

    Which ligaments connect the manubrium of the sternum with the clavicle?

    <p>Anterior and posterior sternoclavicular ligaments</p> Signup and view all the answers

    Which of the following best describes the structure of the subacromial joint?

    <p>An area with a protective bursa without direct bony connection</p> Signup and view all the answers

    Study Notes

    Upper Limb Anatomy

    • Composed of three bones: clavicle, scapula, and humerus.
    • Scapula is a flat bone, slightly concave from the front and convex from behind.
    • Scapula has a spine, dividing the infraspinous and supraspinous fossae.
    • Acromion is a scapular process, continuation of the spine.
    • Coracoid process is a deep, anterior scapular process not palpable.
    • Glenoid fossa is the scapular socket for the glenohumeral joint.
    • Glenohumeral joint is the most mobile ball-and-socket joint.
    • Shoulder has three true joints (sternoclavicular, acromioclavicular, glenohumeral) and two false (scapulothoracic, subacromial).
    • Humerus head forms a 135-140° angle with the shaft.
    • Humerus head has a lesser and greater tubercle for muscle attachments.
    • Glenoid cavity is much smaller than the humeral head, stabilized by the glenoid labrum.
    • Glenoid cavity faces anteriorly, laterally, and slightly superiorly.

    Glenohumeral Joint Ligaments

    • Main ligaments are superior, middle, and inferior glenohumeral ligaments.
    • Other ligaments are the transverse humeral ligament and coracohumeral ligament.
    • Acromioclavicular ligament connects the clavicle and acromion.
    • Sternoclavicular ligaments connect the clavicle and sternum.
    • Subacromial joint is a false joint with a bursa.

    Elbow Joint Ligaments

    • Main ligaments are: ulnar (medial), radial (lateral), and annular ligaments.
    • The joint includes the humerus, radius, and ulna.

    Arm Muscles (Posterior View)

    • Triceps brachii (long, lateral, and medial heads), with insertion into the olecranon process.

    Arm Muscles (Anterior View)

    • Coracobrachialis, originating from the coracoid process.
    • Brachialis, originating beneath the deltoid tuberosity.

    Forearm Muscles (Supination and Pronation)

    • Biceps brachii, with short and long heads.
    • Supinator muscle.

    Forearm Muscles (Flexion/Extension)

    • Pronator quadratus
    • Pronator teres

    Wrist (Radiocarpal) Joint Ligaments

    • Collateral ligaments (radial and ulnar).
    • Triangular fibrocartilage complex (TFCC)
    • The palmar and dorsal ligamentous complexes.

    Hand Muscles

    • Lumbrical and interosseous muscles are intrinsic.
    • Thenar and hypothenar muscles are intrinsic.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Anatomy of the Upper Limb PDF
    Anatomy of the Upper Limb (Locomotor System) PDF

    Description

    Test your knowledge on upper limb anatomy, focusing on the clavicle, scapula, and humerus. This quiz covers essential facts about the shoulder's structure, including the glenohumeral joint and its ligaments. Perfect for anatomy students and healthcare professionals looking to refresh their knowledge.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser