Musculocutaneous and Radial Nerve Anatomy
40 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

Which nerve enters the cubital fossa and then divides into its terminal branches?

  • Radial nerve (correct)
  • Musculocutaneous nerve
  • Median nerve
  • Ulnar nerve
  • Which muscle forms the lateral boundary of the cubital fossa?

  • Pronator teres
  • Biceps brachii
  • Brachialis
  • Brachioradialis (correct)
  • Which branch of the radial nerve provides sensory innervation to the dorsum of the hand and fingers?

  • Muscular branches
  • Deep branch
  • Posterior interosseous nerve
  • Superficial branch (correct)
  • What muscles of the posterior compartment of the arm and forearm are innervated by the radial nerve?

    <p>Triceps brachii, anconeus, and extensor muscles of the forearm</p> Signup and view all the answers

    Which branch of the radial nerve continues into the forearm and supplies motor innervation to the muscles of the posterior compartment of the forearm?

    <p>Deep branch (posterior interosseous nerve)</p> Signup and view all the answers

    What is the primary function of the brachial artery in the cubital fossa?

    <p>To supply oxygenated blood to the forearm and hand</p> Signup and view all the answers

    What is the primary role of the median nerve in the cubital fossa?

    <p>To provide motor and sensory innervation to the muscles and skin of the forearm and hand</p> Signup and view all the answers

    What is the primary function of the bicipital aponeurosis in the cubital fossa?

    <p>To connect the basilic and cephalic veins for venipuncture</p> Signup and view all the answers

    What is the primary purpose of the median cubital vein in the cubital fossa?

    <p>To connect the basilic and cephalic veins for venipuncture</p> Signup and view all the answers

    What is the primary function of the deep branch of the radial nerve in the cubital fossa?

    <p>To provide motor and sensory innervation to the muscles and skin of the forearm and hand</p> Signup and view all the answers

    Where does the cephalic vein typically originate from?

    <p>Dorsal venous arch of the hand</p> Signup and view all the answers

    Which space does the cephalic vein often traverse before entering the axillary region?

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

    What is the termination point of the cephalic vein?

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

    Along which aspect of the forearm does the basilic vein ascend?

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

    What does the basilic vein merge with to form the axillary vein in the axillary region?

    <p>Brachial vein</p> Signup and view all the answers

    Which of the following statements about the musculocutaneous nerve is incorrect?

    <p>It carries fibers primarily from C3, C4, and C5 nerve roots.</p> Signup and view all the answers

    Which of the following muscles is not innervated by the musculocutaneous nerve?

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

    What is the terminal branch of the musculocutaneous nerve that provides sensory innervation to the lateral aspect of the forearm?

    <p>Lateral cutaneous nerve of the forearm</p> Signup and view all the answers

    Which of the following statements about the course of the musculocutaneous nerve is correct?

    <p>It runs alongside the brachial artery in the arm.</p> Signup and view all the answers

    Which of the following nerve roots contribute to the formation of the musculocutaneous nerve?

    <p>C5, C6, C7</p> Signup and view all the answers

    Which ligament connects the lateral epicondyle of the humerus to the annular ligament and lateral ulnar collateral ligament, providing stability against varus (medial) forces?

    <p>Lateral (Radial) Collateral Ligament</p> Signup and view all the answers

    Which of the following muscles is not responsible for flexion of the elbow joint?

    <p>Triceps Brachii</p> Signup and view all the answers

    Which joint is formed by the articulation between the $\text{radial notch of the ulna}$ and the $\text{head of the radius}$?

    <p>Proximal radioulnar joint</p> Signup and view all the answers

    Which of the following ligaments provides stability against $\text{valgus (lateral) forces}$ on the elbow joint?

    <p>Medial (Ulnar) Collateral Ligament</p> Signup and view all the answers

    Which of the following movements at the elbow joint increases the angle between the forearm and upper arm?

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

    Which of the following statements accurately describes the origin of the median cubital vein?

    <p>It arises from the union of the cephalic and basilic veins in the cubital fossa.</p> Signup and view all the answers

    Which nerve primarily innervates the flexor muscles on the medial side of the forearm?

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

    Which muscle is responsible for flexing the distal phalanges of the fingers at the distal interphalangeal (DIP) joints?

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

    What is the primary function of the palmaris longus muscle?

    <p>Flexes the wrist and tenses the palmar aponeurosis</p> Signup and view all the answers

    Which of the following muscles is responsible for flexing and abducting the wrist?

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

    Which muscle is responsible for flexing the thumb at the interphalangeal joint?

    <p>Flexor Pollicis Longus</p> Signup and view all the answers

    Which muscle is primarily responsible for supinating the forearm?

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

    Which muscle extends and abducts the wrist?

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

    Which muscle abducts and extends the thumb?

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

    Which muscle extends the index finger?

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

    Which muscle flexes the elbow when the forearm is in the midposition between pronation and supination?

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

    Which muscle adducts and extends the wrist?

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

    Which muscle flexes and adducts the wrist?

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

    Which of the following is not a muscle in the extensor compartment of the forearm?

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

    Which nerve primarily innervates the muscles in the extensor compartment of the forearm?

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

    More Like This

    Use Quizgecko on...
    Browser
    Browser