The Brain

Question 1

Localisation of function and brain lobes

Answer 1

Functions have specific locations in brain
Hemispheric lateralisation (left controls right and vice versa) and functions split between brain lobes
Frontal lobe at front, occipital lobe at back, parietal between frontal and occipital (top half), temporal below parietal, brain stem thin below temporal and cerebellum between occipital and brain stem

Question 2

Cortex + locations

Answer 2

Motor - frontal lobe of both hemispheres. voluntary movements with logical arrangement of sections based on parts controlled - damage can lead to muscle dysfunction/ paralysis
Somatosensory - parietal lobe of both hemispheres - processes sensations like pain and pressure
Visual - occipital lobe both sides - processing of colour and form starts in retina after light strikes photoreceptors - impulses travel via optic nerve then thalamus relays to visual cortex
Auditory cortex - temporal lobes of both hemispheres - process pitch and volume - starts at cochlea in inner ear w converts to nerve impulses sent via auditory nerve to cortex - decoding occurs in brain stem

Question 3

Language areas

Answer 3

Brocas area in left hemisphere frontal lobe - edamame causes expressive aphasia - affects language production not understanding so e.g grammatically incorrect sentences e.g no ‘it’ or ‘the’
Wernickes area also in left but temporal lobe -lesion in area unable to understand language but produce fine - receptive aphasia so can’t process/understand language and say grammatical sentences but they don’t make sense

Question 4

Localisation of function eval