Radial Nerve Branches and Muscles Origins and Insertions Quiz
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Radial Nerve Branches and Muscles Origins and Insertions Quiz

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@HandierMesa

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Questions and Answers

What nerve branch innervates the Abductor Pollicis Longus (APL) muscle?

  • Superficial branch of radial nerve
  • Deep branch of radial nerve (correct)
  • Median nerve
  • Ulnar nerve

    • What is the origin of the Extensor Pollicis Brevis (EPB) muscle?

  • Distal 1/3 of posterior surface of radius and interosseous membrane (correct)
  • Middle of posterior surface of radius, ulna, and interosseous membrane
  • Distal 1/3 of posterior surface of radius
  • Middle 1/3 of posterior surface of ulna

    • Which muscle inserts on the base of the distal phalanx of the thumb?

  • Extensor Pollicis Longus (EPL) (correct)
  • Abductor Pollicis Longus (APL)
  • Extensor Pollicis Brevis (EPB)
  • Extensor Indicis (EI)

    • What forms the floor of the anatomical snuff box?

    <p>Scaphoid and trapezium bones</p> Signup and view all the answers

    Which tendons bound the anatomical snuff box laterally?

    <p>APL and EPB</p> Signup and view all the answers

    What causes the visible concavity of the anatomical snuff box?

    <p>Full extension of the thumb</p> Signup and view all the answers

    What is the name of the surgical procedure used to relieve symptoms of carpal tunnel syndrome?

    <p>Flexor retinaculum division</p> Signup and view all the answers

    Which nerve is primarily affected in an ulnar nerve lesion, resulting in an 'ulnar claw hand' deformity?

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

    What is the typical sensory distribution of the ulnar nerve?

    <p>Palmar and dorsal surface of the medial 1.5 digits</p> Signup and view all the answers

    Which spinal nerve roots contribute to the formation of the ulnar nerve?

    <p>C8-T1</p> Signup and view all the answers

    Which of the following is the primary function of the ventral/anterior root of a spinal nerve?

    <p>Carry motor information out of the central nervous system</p> Signup and view all the answers

    What is the relationship between dermatomes and myotomes?

    <p>Dermatomes describe the sensory distribution while myotomes describe the motor distribution of a spinal nerve root</p> Signup and view all the answers

    What is the main function of the deep branch of the radial nerve?

    <p>Innervate the muscles in the posterior compartment of the forearm</p> Signup and view all the answers

    What is the mechanism of injury for radial nerve palsy (wrist drop)?

    <p>Fracture of the radial groove of the humerus</p> Signup and view all the answers

    Which of the following muscles is innervated by the median nerve?

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

    What is the main cause of carpal tunnel syndrome?

    <p>Compression of the median nerve as it passes through the carpal tunnel</p> Signup and view all the answers

    Which of the following activities can contribute to the development of carpal tunnel syndrome?

    <p>Typing or other repetitive hand movements</p> Signup and view all the answers

    Which of the following is a symptom of carpal tunnel syndrome?

    <p>Numbness and tingling in the first 3.5 digits of the hand</p> Signup and view all the answers

    Which muscles are affected by the condition described in the text?

    <p>Deltoid, Teres Minor, Distal Triceps, Anconeus, forearm muscles</p> Signup and view all the answers

    What movements would be affected by the condition described?

    <p>Abduction and external rotation of the shoulder, extension of the elbow, wrist, and fingers, supination</p> Signup and view all the answers

    What sensory deficits might be present in the condition described?

    <p>Loss of sensation to the lateral aspect of the shoulder, posterior forearm, and lateral 3.5 digits (dorsal surface)</p> Signup and view all the answers

    What long-term deficit might occur due to the condition described?

    <p>Wrist drop deformity and deltoid atrophy</p> Signup and view all the answers

    Which anatomical reference is mentioned in the text?

    <p>Moore's Clinically Oriented Anatomy</p> Signup and view all the answers

    What is the main cause of lateral epicondylitis (tennis elbow) according to the text?

    <p>Overuse or strain of the common extensor tendon</p> Signup and view all the answers

    Which nerve injury is described in the clinical correlation?

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

    What is the primary cause of medial epicondylitis (golfer's elbow)?

    <p>Forceful and repeated flexion of the wrist and fingers</p> Signup and view all the answers

    What anatomical structure does the radial artery pass through according to the text?

    <p>Anatomical snuff box</p> Signup and view all the answers

    What is a common symptom associated with both medial and lateral epicondylitis?

    <p>Tenderness and pain at the affected epicondyle</p> Signup and view all the answers

    Which muscle group is primarily affected in medial epicondylitis?

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

    Which of the following is NOT a function of the midbrain?

    <p>Transmits all ascending and descending tracts between the cerebrum and spinal cord</p> Signup and view all the answers

    What is the primary role of the substantia nigra in the midbrain?

    <p>Regulating voluntary movements through the basal ganglia</p> Signup and view all the answers

    Which of the following is a function of the red nucleus in the midbrain?

    <p>Being associated with the rubrospinal tract as part of the extrapyramidal pathways</p> Signup and view all the answers

    Which of the following is NOT a structure found in the transverse section of the midbrain?

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

    What is the main function of the superior and inferior colliculi in the midbrain?

    <p>Relay centers for visual and auditory reflexes, respectively</p> Signup and view all the answers

    What is the primary role of the cerebral peduncles in the midbrain?

    <p>Contain descending tracts such as corticospinal and corticobulbar tracts</p> Signup and view all the answers

    What is the primary function of the diencephalon in the human brain?

    <p>To regulate the autonomic nervous system and endocrine function</p> Signup and view all the answers

    Which of the following is NOT a primary function of the thalamus within the diencephalon?

    <p>Controlling voluntary movement and motor coordination</p> Signup and view all the answers

    What is the primary role of the epithalamus within the diencephalon?

    <p>Regulating the circadian rhythm and distribution of melanin pigment in the skin</p> Signup and view all the answers

    Which of the following is a key function of the hypothalamus within the diencephalon?

    <p>Regulating the function of the major endocrine glands via the pituitary gland</p> Signup and view all the answers

    What is the relationship between the diencephalon and the cerebral hemispheres?

    <p>The diencephalon is located between the cerebral hemispheres and the midbrain, serving as a processing and distribution center</p> Signup and view all the answers

    What is the primary function of the pineal gland, which is part of the epithalamus within the diencephalon?

    <p>To regulate the body's circadian rhythm and the distribution of the pigment melanin in the skin</p> Signup and view all the answers

    What is the primary function of the pontine nuclei?

    <p>To relay motor pathways between the cerebrum and cerebellum for coordination of voluntary movements</p> Signup and view all the answers

    Which cranial nerves emerge from the ponto-medullary sulcus?

    <p>Cranial nerves VI, VII, and VIII</p> Signup and view all the answers

    What is the location of the Periaqueductal Gray Matter (PAG)?

    <p>Around the cerebral aqueduct in the midbrain</p> Signup and view all the answers

    Which of the following statements about the midbrain is correct?

    <p>The tectum is located behind the cerebral aqueduct, the tegmentum extends from the aqueduct to the substantia nigra, and the cerebral peduncle is inferior to the tegmentum.</p> Signup and view all the answers

    Which of the following nuclei are NOT mentioned as being present in the pons?

    <p>Vestibular nuclei</p> Signup and view all the answers

    What is the relationship between the pons and the surrounding structures?

    <p>The pons is related to the cerebellum posteriorly, the medulla oblongata inferiorly, and the midbrain superiorly.</p> Signup and view all the answers

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