Lateralization of Functions Quiz
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Questions and Answers

What does lateralization refer to?

  • Control of both hemispheres equally
  • The process of healing the brain
  • Synchronization of brain functions
  • Localization of a function in one hemisphere (correct)
  • Hemisphere dominance for personality is a fact.

    False

    What is hemispherectomy most effective for?

    Rasmussen's syndrome and seizures in one hemisphere.

    What happens in the split brain condition?

    <p>The pathways connecting the right and left cerebral hemispheres are severed.</p> Signup and view all the answers

    Match the following visual fields with their corresponding actions:

    <p>Left Visual Field = Verbalize moving the right arm Right Visual Field = Draw/use object moving the left arm</p> Signup and view all the answers

    What role do prenatal androgens play in lateralization?

    <p>They contribute to the development of lateralization; more males are left-handed.</p> Signup and view all the answers

    What is generally true about the planum temporale?

    <p>In most people, the left planum temporale is larger than the right.</p> Signup and view all the answers

    Anecdotal evidence suggests girls begin speaking younger and have larger vocabularies.

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

    What does meta-analysis reveal about gender differences in handedness?

    <p>Gender difference in handedness exists but no significant differences in lateralization of language or structural symmetry.</p> Signup and view all the answers

    What functions does the right hemisphere control?

    <p>Motor control of the left side of the body, processing of the left visual field, and prosody.</p> Signup and view all the answers

    What functions does the left hemisphere control?

    <p>Motor control of the right side of the body, processing of the right visual field, language, and logical processing.</p> Signup and view all the answers

    Why do we have a hand preference?

    <p>90% of people are right-handed and 10% are left-handed.</p> Signup and view all the answers

    Study Notes

    Lateralization of Functions

    • Lateralization refers to the localization of brain functions in either the left or right hemisphere.

    Myth vs Fact

    • Hemisphere Dominance for personality traits is a myth; specific functions do exhibit lateralization.

    Hemispherectomy

    • Effective treatment for Rasmussen's syndrome, which involves seizures in one hemisphere of the brain.

    The Split Brain

    • Condition where neural pathways between the cerebral hemispheres are severed.
    • Research by Bogen demonstrated no changes in personality, intelligence, or speech post-surgery.
    • Reports of unusual behaviors, including the phenomenon known as "alien hand."
    • Gazzaniga and Sperry also contributed to understanding this condition.

    Left Visual Field

    • Stimuli in the left visual field can prompt movement of the right arm and verbalization.

    Right Visual Field

    • Stimuli in the right visual field leads to movement of the left arm and the ability to draw or use objects.

    Development of Lateralization

    • Prenatal androgens influence lateralization; more males tend to be left-handed.
    • Females with congenital adrenal hyperplasia (CAH) are more likely to be left-handed.
    • Hemispheric asymmetry has implications for behavior, handedness, language, and musical abilities.
    • Dichotic listening tasks provide evidence for lateralization, including prosody in language.

    The Planum Temporale

    • The left planum temporale is typically larger than the right in most individuals.
    • In musicians with perfect pitch, this size difference is even more pronounced, suggesting a left-hemisphere mediation for perfect pitch.

    Anecdotally

    • Girls generally start speaking earlier, have larger vocabularies, perform better in reading, and receive fewer diagnoses for language disabilities.

    Meta-Analysis

    • Studies confirm a gender difference in handedness but find no significant discrepancies in lateralization of language or structural brain symmetry.

    Right Hemisphere

    • Responsible for motor control of the left side of the body and processing left visual field information.
    • Exhibits a left-ear advantage in dichotic listening tasks.
    • Involved in prosody, music, intuition, spatial relations, and artistic abilities.

    Left Hemisphere

    • Controls motor functions for the right side of the body and processes information from the right visual field.
    • Shows a right-ear advantage in dichotic listening tasks.
    • Plays a central role in language, mathematical tasks, and logical processing.

    Why do we have a hand preference?

    • About 90% of individuals are right-handed, while roughly 10% are left-handed.

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    Description

    Test your knowledge on the lateralization of brain functions with this quiz. Explore key concepts such as hemisphere dominance and treatments like hemispherectomy. Challenge yourself with flashcards that differentiate between myth and fact in brain function localization.

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