1. Wernicke's area, located in the posterior superior temporal gyrus, is responsible for language comprehension by transforming sensory input into neural representations of words and establishing associations to give words meaning. 2. Broca's area, located in the posterior inferior frontal gyrus, transforms neural word representations into articulatory sequences for speech production and sequencing words into sentences. 3. The angular gyri feed visual information from written words into Wernicke's area to establish meaning from visually perceived words. Information then passes from Wernicke's area to Broca's area via the arcuate fasciculus to control speech muscles in the primary motor cortex for speech.

2. 1. WERNICKE’S AREA (22)
-Area for language comprehension.
 Posterior 3rd of superior temporal gyrus,a
surrounding rim of inferior parietel & mid
temporal cortex.
FUNCTION :Transform sensory input into neural
word representation.
Establish distributed assoc that give
word its meaning.

3. 2.BROCA’S AREA (44)
 Anterior pole of language network.
 Posterior part of inferior frontal gyrus $ a
surrounding rim of prefrontal heteromodal
cortex.
 FUNCTION: Transform neural word
representation into articulatory sequence
sequencing function-ordering
of words into sentences

5. 3.ANGULAR GYRI
 Lower part of anterior parietal lobe
 FUNCTION : feeds visual information
conveyed by words from a book into
wernickes-meaning out of visually
percieved words.

6. 4.ARCUATE FASCICULUS
 Information passes from wernickes to
brocas.
5.PRIMARY MOTOR
CORTEX
 Signals from brocas received to ctrl
speech muscles.

7. 6.PRIMARY AUDITORY AREA
 In superior temporal gyrus
 Reception of sound signals
7.PRIMARY VISUAL AREA
 In occipetal lobe
 Initial receptive area for words from visual field

8. HEARING N SPEAKING
SOUND SIGNALS
PRIMARY AUD AREA
WERNICKES AREA
arcuate fasciculus
BROCAS AREA
CRANILA N NUCLEI(PONS MEDULLA)
ANT HORN CELLS IN SP CORD
facial n cranil n 9 10 12
SPEECH MUSCLES

9. READING N SPEAKING
PRIMARY VISUAL AREA
ANGULAR GYRUS
WERNICKES

10.  Hemispherical dominance-lt hemisphere in
majority
few-rt hemisphere n in some no
dominance