Pectoralis Major Muscle Quiz
10 Questions
16 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 flexion, adduction, and medial rotation of the arm?

  • Pectoralis major (correct)
  • Pectoralis minor
  • Deltoid
  • Biceps brachii
  • Which nerve supplies the Pectoralis major muscle?

  • Radial Nerve
  • Lateral Pectoral Nerve (correct)
  • Ulnar Nerve
  • Medial Pectoral Nerve
  • Where does the clavicular head of the Pectoralis major muscle originate from?

  • External abdominal oblique aponeurosis
  • Anterior surface of medial ½ of the clavicle (correct)
  • Front of the upper 6 costal cartilages
  • Anterior surface of the sternum
  • What is the insertion point of the Pectoralis major muscle?

    <p>Lateral lip of the bicipital groove</p> Signup and view all the answers

    Which muscle extends the flexed arm?

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

    Which muscle raises the ribs in forced inspiration?

    <p>Subclavis muscle</p> Signup and view all the answers

    Where does the Subclavis muscle insert?

    <p>Groove on the lower surface of the middle 1/3 of the clavicle</p> Signup and view all the answers

    Which nerve supplies the Subclavis muscle?

    <p>Nerve to Subclavius (C5, C6)</p> Signup and view all the answers

    What is the origin of the Serratus anterior muscle?

    <p>Outer surfaces of the upper 8 ribs</p> Signup and view all the answers

    Where does the first digitations of the Serratus anterior muscle insert?

    <p>Superior angle of the scapula</p> Signup and view all the answers

    Study Notes

    Muscles and their Functions

    • Pectoralis major muscle is responsible for flexion, adduction, and medial rotation of the arm.
    • The muscle that extends the flexed arm is the deltoid, particularly the posterior fibers.
    • Muscle responsible for raising the ribs during forced inspiration is the external intercostals.

    Innervation and Blood Supply

    • Pectoralis major muscle is supplied by the lateral and medial pectoral nerves.
    • Subclavius muscle is supplied by the nerve to the subclavius.
    • Both pectoralis major and subclavius receive blood through branches from the thoracoacromial trunk.

    Muscle Origins and Insertions

    • Clavicular head of the Pectoralis major originates from the medial half of the clavicle.
    • The insertion point of the Pectoralis major is the lateral lip of the bicipital groove of the humerus.
    • Serratus anterior muscle originates from the upper eight or nine ribs.
    • The first digitations of the Serratus anterior muscle insert into the medial border of the scapula.

    Studying That Suits You

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

    Quiz Team

    Description

    Test your knowledge on the origin, insertion, nerve supply, and action of the pectoralis major muscle in this quiz. Learn about the clavicular and sterno costal heads, as well as their specific anatomical details. Perfect for anatomy enthusiasts and students studying the upper body muscles.

    More Like This

    Use Quizgecko on...
    Browser
    Browser