How the Brain Uses Multiple Pathways for Reading, Speaking, and Writing

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When you read silently, your brain sends a visual signal to the speech pathway in the motor cortex. Even though no sound is made, activity can be detected in the laryngeal muscles. The signal then goes to the auditory pathway so you can hear what you're saying in your head. To write, you use the hand area near the speech pathway to convert the auditory signal into a visual one on paper. This process involves at least four brain circuits. It's fascinating how the brain coordinates reading and writing.

My guest this episode is Dr. Erich Jarvis, PhD—Professor and the Head of the Laboratory of Neurogenetics of Language at Rockefeller University and Investigator with the Howard Hughes Medical Institute (HHMI). Dr. Jarvis’ research spans the molecular and genetic mechanisms of vocal communication, comparative genomics of speech and language across species and the relationship between speech, language and movement. We discuss the unique ability of humans (and certain animal species) to learn and communicate using complex language, including verbal speech production and the ability to interpret both written and spoken language. We also discuss the connections between language, singing and dance and why song may have evolved before language. Dr. Jarvis also explains some of the underlying biological and genetic components of stutter/speech disorders, non-verbal communication, why it's easiest to learn a language as a child and how individuals can learn multiple languages at any age. This episode ought to be of interest to everyone interested in the origins of human speech, language, music and culture and how newer technology, such as social media and texting, change our brains.

For the full show notes, visit hubermanlab.com.

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Timestamps

(00:00:00) Dr. Erich Jarvis & Vocal Communication

(00:03:58) Sponsors: AG1, LMNT

(00:08:01) Speech vs. Language, Is There a Difference?

(00:10:55) Animal Communication, Hand Gestures & Language

(00:15:25) Vocalization & Innate Language, Evolution of Modern Language

(00:21:10) Humans & Songbirds, Critical Periods, Genetics, Speech Disorders

(00:27:11) Innate Predisposition to Learn Language, Cultural Hybridization

(00:31:34) Genes for Speech & Language

(00:35:49) Learning New or Multiple Languages, Critical Periods, Phonemes

(00:40:47) Sponsor: AG1

(00:42:52) Semantic vs. Effective Communication, Emotion, Singing

(00:47:32) Singing, Link Between Dancing & Vocal Learning

(00:52:55) Motor Theory of Vocal Learning, Dance

(00:55:03) Music & Dance, Emotional Bonding, Genetic Predispositions

(01:04:11) Facial Expressions & Language, Innate Expressions

(01:09:35) Reading & Writing

(01:15:13) Writing by Hand vs. Typing, Thoughts & Writing

(01:20:58) Stutter, Neurogenetics, Overcome Stutter, Conversations

(01:26:58) Modern Language Evolution: Texting, Social Media & the Future

(01:36:26) Movement: The Link to Cognitive Growth

(01:40:21) Comparative Genomics, Earth Biogenome Project, Genome Ark, Conservation

(01:48:24) Evolution of Skin & Fur Color

(01:51:22) Dr. Erich Jarvis, Zero-Cost Support, YouTube Feedback, Spotify & Apple Reviews, Momentous Supplements, AG1 (Athletic Greens), Instagram, Twitter Neural Network Newsletter, Huberman Lab Clips

Title Card Photo Credit: Mike Blabac

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