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Hemispheric specialization and creativity.

K D Hoppe1

  • 1Hacker Clinic, Los Angeles, California.

The Psychiatric Clinics of North America
|September 1, 1988
PubMed
Summary
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Split-brain patients exhibit significantly reduced creativity due to severed interhemispheric communication. Expressive-creative individuals, however, demonstrate symbollexia, linking right-hemisphere imagery to left-hemisphere language.

Area of Science:

  • Neuroscience
  • Psychology
  • Cognitive Science

Background:

  • Investigating creativity differences between commissurotomy (split-brain) patients and controls.
  • Examining the role of interhemispheric communication via the corpus callosum in creativity.

Observation:

  • Commissurotomy patients display a marked lack of creativity across lexical, sentential, global, and affective domains.
  • Expressive-creative individuals verbalize right-hemisphere imagery, a process termed symbollexia, facilitated by corpus callosum transfer.

Findings:

  • Creativity is posited as the opposite of alexithymia, supported by EEG data showing inhibited inner speech in alexithymic individuals versus higher interhemispheric coherence in creative persons.
  • Split-brain patients show restrictive superego components and suppressed emotional expression compared to creative individuals who openly verbalize anxiety and embrace existence as creation.

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Implications:

  • Hemispheric bisociation is a key concept for understanding creativity.
  • Balanced transcallosal symbollexia and hemispheric bisociation are crucial for psychological well-being and may be important in psychotherapy.