cortex anatomy Flashcards
Where / In which lobe is the primary motor cortex located?
Precentral gyrus of the frontal lobe
Where / In which lobe is the somatosensory cortex located?
Postcentral gyrus
of
Parietal lobe
Where / In which lobe is the auditory cortex located?
Superior temporal lobe
Where / In which lobe is the olfactory cortex located?
orbitalfrontal cortex of frontal lobe
How do signals reach the somatosensory cortex?
Via the posterior limb of the internal capsule
How do auditory signals reach the temporal lobe?
MGN of the thalamus
How do visual signals reach the occipital cortex?
via the lateral genticulate nucleus of the thalamus
where is Broca’s area?
Dominant frontal lobe
(speech output)
where is Wernicke’s area?
Temporal lobe
Posterior superior temporal gyrus
(word comprehension)
what characteristics does a frontal lobe insult produce?
anosmia
abnormal affect
personality changes
poor planning of tasks
broca’s aphasia
perseveration
what characteristics does a parietal lobe insult produce?
spatial representation / visuospatial neglect
apraxia
visual field defects - quadrantinopia)
Acalculia
what is astereogenesis?
tactile anosmia
(failing to recognize object by feel)
what is gerstmann’ss syndrome?
alexia (word blind)
agraphia
finger agnosia (inability to count fingers)
what characteristics does a occipital lobe insult produce?
cortical blindness
homonymous hemianopia
visual agnosmia (failure to know meaning of objects)
what characteristics does a temporal lobe insult produce?
wernicke’s aphashia
impaired musical perception
memory impairment
emotional disturbance
