Anatomy 6
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Questions and Answers

Which nerve network supplies the upper limb?

  • Sacral plexus
  • Cervical plexus
  • Lumbar plexus
  • Brachial plexus (correct)
  • Where does the brachial plexus begin?

  • In the axilla
  • In the arm
  • In the shoulder
  • In the neck (correct)
  • Which muscles do the roots of the brachial plexus pass through?

  • Anterior and middle scalene muscles (correct)
  • Biceps and triceps muscles
  • Deltoid and trapezius muscles
  • Pectoralis major and latissimus dorsi muscles
  • How many trunks does the brachial plexus form?

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

    Which divisions supply the anterior compartments of the upper limb?

    <p>Anterior divisions of the trunks</p> Signup and view all the answers

    Which divisions supply the posterior compartments of the upper limb?

    <p>Posterior divisions of the trunks</p> Signup and view all the answers

    Which divisions unite to form the lateral cord?

    <p>Anterior divisions of the superior and middle trunks</p> Signup and view all the answers

    Which division continues as the medial cord?

    <p>Anterior division of the inferior trunk</p> Signup and view all the answers

    Which divisions unite to form the posterior cord?

    <p>Posterior divisions of all three trunks</p> Signup and view all the answers

    Where do almost all branches of the brachial plexus arise?

    <p>In the axilla</p> Signup and view all the answers

    Which nerve passes through the scalene muscles in the neck?

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

    Which part of the brachial plexus is associated with the ulnar nerve?

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

    What are the muscle actions of the upper fibers of the trapezius muscle at the head and neck?

    <p>extension lateral flexion and contralateral rotation</p> Signup and view all the answers

    Which muscle is innervated by the spinal accessory nerve?

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

    Which muscle is responsible for the protraction of the scapula?

    <p>Serratus anterior</p> Signup and view all the answers

    Which nerve is associated with winged scapula when paralyzed?

    <p>Long thoracic nerve</p> Signup and view all the answers

    Which muscle is responsible for the flexion of the arm?

    <p>Pectoralis major</p> Signup and view all the answers

    Which muscle is associated with the thoracodorsal nerve?

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

    Which muscle is responsible for the extension of the arm?

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

    Which nerve is formed by the medial and lateral cords of the brachial plexus?

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

    Which nerve innervates the skin of the upper limb?

    <p>Musculocutaneous nerve</p> Signup and view all the answers

    Which nerve is associated with the arterial supply of the upper limb?

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

    How many divisions are formed from the three trunks of the brachial plexus?

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

    Which cord of the brachial plexus is formed from the anterior division of the inferior trunk?

    <p>Medial cord</p> Signup and view all the answers

    How many terminal branches are formed from the three cords of the brachial plexus?

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

    Which nerve arises from the posterior divisions of all three trunks of the brachial plexus?

    <p>Radial nerve</p> Signup and view all the answers

    Which nerves continue into the upper limb to provide innervation to the muscles and skin?

    <p>Terminal branches of the brachial plexus</p> Signup and view all the answers

    Which nerve does the axillary nerve come from?

    <p>C5 and C6</p> Signup and view all the answers

    Match the deltoid fibers with the according actions/nerve

    <p>deltoid muscle = axillary nerve (C5-C6) anterior fibers = flexion, medial rotation, horizontal adduction middle fibers = abduction posterior fibers = lateral rotation, extension, and horizontal abduction</p> Signup and view all the answers

    Match the muscles of the rotator cuff with their insertion.

    <p>supraspinatus = GT of humerus infraspinatus = GT of humerus teres minor = GT of humerus subscapularis = LT of humerus</p> Signup and view all the answers

    Match the muscle action of the muscles of the rotator cuff.

    <p>supraspinatus = abduction infraspinatus = lateral rotation teres major = lateral rotation subscapularis = medial rotation</p> Signup and view all the answers

    What are the functions of the teres major muscle?

    <p>extension, medial rotation, adduction and horizontal abduction</p> Signup and view all the answers

    Match the nerves that pass through the axillary spaces

    <p>triangular = circumflex scapular artery quadrangular = axillary nerve quadrangular = posterior circumflex artery triangular interval = radial profunda brachii artery</p> Signup and view all the answers

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