Speech and cortical asymmetry Flashcards
what is A?
insula
where are speech functions controlled in the brain? [2]
where are speech functions controlled in the brain? [2]
Brocas area
insula
what is the opercular cortex?
how does it differ between L & R ?
what is the opercular cortex?
cortex on the upper and lower ‘lips’ of the lateral fissure
how does it differ between L & R ?
left
language vocalisation is controlled by specialised cortical areas in WHICH hemisphere only? [1]
what is the name for this area? [1]
language vocalisation is controlled by specialised cortical areas in WHICH hemisphere only? [1]
left hemisphere only !!
what is the name for this area? [1]
broca area
what is wernicke’s area associated with? [1]
where in the brain is it? [1]
what is wernicke’s area associated with? [1]
language input / perception
where in the brain is it? [1]
upper end of superior temporal gyrus in the temporal lobe
which lobe is wernickes area found in?
frontal
parietal
temporal
occipital
cerebellum
which lobe is wernickes area found in?
frontal
parietal
temporal
occipital
cerebellum
what is the difference in activity between left and right hemisphere:
a) wernickes area
b) brocas area
what is the difference in activity between left and right hemisphere:
a) wernickes area
- *left:** active
- *right**: inactive
b) brocas area
- *left:** active
- *right**: inactive
BUT: auditory is active in both !!
what characterises broca’s aphasia?
what characterises wernickes aphasia?
what characterises broca’s aphasia:
- halting speech
- repetitive
- sense behind words, just cant get them out!
what characterises wernickes aphasia
- speaks fluently but in almost meaningless way
broca’s and wernickes areas are joined by WHAT? [1]
broca’s and wernickes areas are joined by arcuate fasciculus
What is the name for when A is damaged? [1]
what is this charactersised by? [2]
What is the name for when A is damaged? [1]
conduction aphasia
what is this charactersised by? [2]
difficulty reading aloud / read back something
but good comprehension
what is the Wernicke-Geschwind model?
- hear speech: goes to auditory cortex
- decoded sounds goes to wernickes area -> analysed to see if speech sounds & meaning
- once have meaning (new neuronal input) -> sends to brocas area
- new synapse to produce speech from brocas –> motor cortex
why is it harder for people who are born deaf to develop speech?
cant hear their own words, so that makes it difficult to learn
broca and wernickes areas are supplied by which artery? [1]
broca and wernickes areas are supplied by which artery? [1]
middle cerebral artery
broca and wernickes areas are supplied by which artery? [1]
interal carotid artery
basilar artery
pontine arteries
middle cerebral artery
PICA
broca and wernickes areas are supplied by which artery? [1]
interal carotid artery
basilar artery
pontine arteries
middle cerebral artery
PICA
are there differences in the cognitive functions of the left and right brains?
not really xx
BUT: in prefrontal lobes
L: focus attention, analytical and logical skills
R: broad overall vigilance on all sensory inputs - if something important occurs you can switch your attention and concentrate on the new inputs. overrides the attention to detail so u can survive
