SSEH3345 Lecture Notes - Lecture 6: Auditory Cortex, Motor Cortex, Visual Cortex
16 Jun 2019
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Ability to speak involves >100 muscles involved in facial expression and manipulation of sound. Infant"s cry because of hunger, pain (gas), discomfort (temperature, wetness, fear) Crying is a re ex (initiated by a stimulus, with age, stimulus can be emotional situation, 5 months infants can fake cry") Voluntary control of verbal and non-verbal language begins around the same time (2-3 months) Primary visual cortex - processes visual information. Wernicke"s area - involved in comprehension: understanding of visual and auditory information. Broca"s area - some comprehension, neural coding of motor commands. Primary motor cortex - execution of movement. Auditory cortex processes spoken words: wernicke"s area processes visual and spoken information, broca"s area triggers speech production, motor cortex controls physical aspects of speech. Two hemispheres do not comprehend and code information equally. Left hemisphere has more specialised language centres. 95% right handers and 70% left handers. How do we know the left hemisphere is more superior.
