Localisation Of Function Flashcards
Where is the motor centre and what is it’s function?
Frontal lobe in both hemispheres
Voluntary movement like walking and writing
One side controls the other side
Different parts organised in order or body parts
Damage = impaired fine movement
Where is the somatosensory centre and what is it’s function?
Parietal lobe behind the motor cortex.
Detecting and processing sensory information
Producing sensation of pain, pressure, touch and temperature
One side = other side
Damage = inability to feel pain/pressure
Where is the visual centre and what is it’s function?
Occipital lobe in both hemispheres.
Receiving and processing visual information
Left hemisphere = right VF
Damage = left = inability to see right and vice versus, inability to interpret imagery, prosopagnosia (inability to recognise faces)
Where is the motor centre and what is it’s function?
Temporal lobe in both hemispheres.
Receiving and processing sound and speech based info
Allows us to know what a sound is and where it is located
Damage = hearing loss, inability to recognise or interpret sounds
Where is Broca’s area and what is it’s function?
Left frontal lobe
Production of speech
From post mortem if someone who could only say tan
Damage = broca’s aphasia where speech is slow and laborious and lacks fluency
Where is Wernickes area and what is it’s function?
Left temporal lobe close to auditory cortex
Understanding speech
Damage = wernickes aphasia where people make up nonsense words (neologisms) and might suffer aphasia where they struggle to find the word they want to say. Many patients speak fluently, but produce meaningless speech (word salad)
How are wernickes area and Broca’s area connected?
Broca’s = motor component and wernickes = sensory. Connected by a neural loop
What is the evaluation (SCCCI) for localisation of function?
S - phineas gage had pole through head (frontal lobe) and temperament change (rude) - frontal lobe = impulse control (C = case study) + WMM
C: rats had 10-50% vortex removed when learning a route through a maze but no area was found to be more important - none were working alone - some processes = all of the brain
C: some more localised than others like somatosensory and motor // consciousness and personality
C: brain plasticity says some functions take over others when needed
I: females had larger Broca’s and wernickes area - no attempt to explain - beta bias. Could explain greater ease of Lang in females.
