language centres

Question 1

what does the angular gyrus process

Answer 1

text and numbers into a form we can speak

Question 2

which hemisphere is dominant for language in most people

Answer 2

left

Question 3

what is wernicke’s aphasia

Answer 3

issue with speech comprehension

Question 4

describe the visual image pathway

Answer 4

Visual images are sent via the retinogeniculate pathway via thalamus and then via optic radiations to the visual cortex
Area 19 within visual cortex then interprets whether the string of symbols represents a real word
Then that information is sent via splenium of corpus callosum to dominant hemisphere
That visual image (grapheme) is then converted to a phoneme within the angular gyrus.
That information is then sent to wernicke’s area in the temporal lobe for comprehension
Then sent onto Broca’s area via the arcuate fasciculus for production of speech pattern
That speech pattern is sent to primary motor cortex for activation of appropriate muscle

Question 5

that auditory signal will continue on via the MGN of the thalamus to the primary auditory cortex (area 41) via auditory radiations.
Signals are then transmitted to _________ in the auditory association area.

Answer 5

Wernicke’s area

Question 6

what joins the Wernicke’s and Broca’s area

Answer 6

arcuate fasciculus

Question 7

what is dysarthria

Answer 7

label for group of speech disorders caysed by impaired control of the muscles responsible for speech

Question 8

what is broca’s aphasia (motor aphasia)

Answer 8

issues with speech production

Question 9

what is the function of wernicke’s area

Answer 9

permits recognition of spoken and written langauge and creates plan of speech

Question 10

what is the dorsal auditory pathway responsible for

Answer 10

is responsible for the quality of the sound e.g. it will detect differences between the words ‘bet’ and ‘bat’.

Question 11

what is the function of broca’s area

Answer 11

generates motor program for larynx, tongue, cheek and lip muscles to create movement for phonation and trasmits that to primary motor cortex

Question 12

what is Associative aphasia

Answer 12

the connection between wernicke’s and broca’s area is damaged

Question 13

what is auditory agnosia

Answer 13

inability to differentiate or recognise sounds

Question 14

what is a clinical perspective for Wernicke’s area

Answer 14

sensory aphasia

Question 15

what is the ventral auditory pathway responsible for

Answer 15

concerned with the direction of sound and timed differences.