Human Vocalizations and Laryngeal Motor Control
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Questions and Answers

What type of vocalizations are controlled by the limbic pathway?

  • Innate vocalizations such as speaking and singing
  • Fine motor control of vocalizations
  • Learned vocalizations such as language
  • Innate vocalizations such as crying and laughter (correct)

    • What is the function of the laryngeal motor cortex in relation to vocalizations?

  • It controls the pyramidal system
  • It allows humans to mimic innate vocalizations (correct)
  • It controls the limbic pathway
  • It controls the vagus nerve

    • Which set of muscles of the larynx does not receive bilateral innervation?

  • All muscles receive unilateral innervation
  • One set of muscles does not receive bilateral innervation (correct)
  • One set of muscles receives only right brain control
  • One set of muscles receives only left brain control

    • What is the function of the extrapyramidal system in relation to motor control?

    <p>It reduces unwanted motor activity</p> Signup and view all the answers

    What is the function of the basal ganglia in relation to motor control?

    <p>It controls the amount of movement</p> Signup and view all the answers

    What is the result of a pyramidal lesion?

    <p>Flaccid paralysis</p> Signup and view all the answers

    What is the function of the vagus nerve (X CN) in relation to vocalizations?

    <p>It controls the superior laryngeal nerve</p> Signup and view all the answers

    What is the result of an extrapyramidal lesion?

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

    Study Notes

    Limbic Pathway for Innate Vocalizations

    • Limbic pathway involves crying and laughter
    • Laryngeal motor cortex provides fine motor control for these innate vocalizations
    • Allows humans to mimic these innate vocalizations

    Laryngeal Muscle Innervation

    • All but one set of laryngeal muscles receive bilateral innervation (motor and sensory)
    • Left and right brain control both sides of the larynx

    Pyramidal System

    • Direct Pathway: Corticobulbar and Corticospinal
    • Responsible for voluntary movements

    Extrapyramidal System

    • Indirect pathway
    • Function: helps maintain baseline level of tone
    • Modulated by the Basal ganglia, controlling amount of movement
    • Direct Pathway: increases motor activity
    • Indirect Pathway: reduces unwanted motor activity
    • Cerebellum: adjusts, improves coordination, sends and receives information

    Lesions

    • Pyramidal lesions: Flaccid, Spastic
    • Extrapyramidal lesions: Dyskinesias, Tremor, Chorea, Athetosis, Myoclonus, Ataxia

    Vagus Nerve (X CN)

    • Superior Laryngeal nerve involved

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    Description

    Study guide for Quiz 1 covering limbic pathway, laryngeal motor cortex, and pyramidal system in relation to human vocalizations and motor control.

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