Neuro Disorders Due To Lesions In Specific Parts Flashcards
Anger and hostility
Left dorsofrontal
Anxiety and depression
R orbitofrontal
Apathy and lack of initiative
Dorsolateral frontal
Facetious & socially inappropriate state
Orbital and medial frontal
Greatets cognitive-intellectual deficits
Dorsolateral prefrontal
Greatest personality, mood and behavioral changes
Medial orbitofrontal
Witzelsucht or moria
Inferofrontal
Pathological collecting behavior/ hoarding
Medial frontal and cingulate gyri
Compulsive behavior, combativeness and extreme insomnia
Caudate-frontal connections
Hyperactivity syndrome or organic driveness seen in children who survived encephalitis lethargica
Dorsolateral frontal
Test for kinetic limb apraxia
3-step hand posture test of Luria
Reduced attention to c/l visual environment
FEF
Upper homonymous quadrantanopsia
Geniculocalcarine pathway in the central and posterior parts of temporal lobe;
Meyer’s loop
Kluver Bucy syndrome
B/l temporal lobes
Cortical or central deafness
B/l transverse gyri of Heschl
Wernicke’s aphasia
L superotemporal region
Broca 41, 42
Auditory agnosia
Secondary or unimodal association zones of auditory corte
BA 22 and part of BA 21
Amusia
Right > left middle temporal gyrus
Impaired recognition of melody and of harmony
Right auditory cortex
Word deafness
Left temporal lobe
Vestibular disturbances
Superior and posterior temporal lobe, posterior to primary auditory cortex
Korsakoff amnesic state
Medial temporal lobes
Olfactory hallucinations +/- intellectual aura
= Uncinate fits
Uncus or medial part of temporal lobe
Olfaction areas
Posterior orbitofrontal
Subcallosal
Anterior temporal
Insular cortex
Taste sensation and alimentary function
Posterior insular area
Amnesic dysnomia - defect in retrieval of words
Large inferolateral part of dominant temporal lobe
Prosopagnosia
Bilateral ventromedial occipitotemporal regions including the inferior occipital or midfusiform gyri
Or
Unilateral lesion, always on the right
Touch, pressure, pain, thermal, vibratory & position sense are lost on 1 side of the body or in 1 limb
Thalamic lesion and not of a parietal unless a large, acute lesion
Gerstmann syndrome
Left dominant inferior parietal lobule, particularly the angular gyrusbor subjacent white matter of left hemisphere
Visual neglect
Right posterior inferior parietal lobe - MCA
Or
Posterior medial temporal lobe - PCA
Severe left sided visual neglect
Right angular gyrus - MCA
Balint syndrome
Bilateral disorder of parietal lobes
Or
BA 19 & 7 of parietooccipital regions
Topographagnosia
White mattter deepbto superior and inferior parietal lobes
Auditory neglect
Right superior lobule of parietal region
Loss of ability to identify objects
Bilateral temporal visual zones
Loss of ability to locate objects
Posterior parietal regions
T/F
Optokinetic responses are usually spared in hemianopic deficits of occipital origin
True
Anton syndrome
Visual anosognosia
Beyond stiate cortex to involve visual association areas
Cortical blindness
Bilateral BA 17
Visual illusion of movement
Occipital lobes or posterior temporal lobe
Illusion of tilting of environment or upside-down vision
Parieto-occipital regions or
Vestibular system
Elementary visual hallucinations
Calcarine cortex - occipital
Complex visual hallucinations
Visual association areas or their connections with temporal lobes
Peduncular hallucinosis of Lhermitte
Ischemia in territories of PCA
Environmental agnosia
Right or bilateral medial temporooccipital regions
Central achromatopsia + prosopagnosia
Inferomedial, occipital and temporal and lowermost of striate cortex or optic radiation
Color anomia
Medial part of left hemisphere at junction of occipital and temporal lobes just below the splenium of corpus callosum
Visual simultagnosia
Inferolateral dominant occipital lobe (BA 18)
Spelling dyslexia plus simultagnosia
Inferior left occipital lobe
Or
Bilateral superior occipital association cortices
Visual part of disconnection syndrome
Posterioe part of corpus callosum or splenium
Conduction aphasia
Central aphasia
Arcuate fasciculus or external capsule or subcortical white matter
Ssympathetic apraxia in Broca’s aphasia
Fibers connecting the left and right motor association cortices, more anterior partsvof corpus callosum or subcortical white matter underlying broca’s area and contiguous frontal cortex
Pure word deafness
Left temporal spanning Wernicke’s area
Or
Auditory fibers crossing corpus callosum fr c/l side
Or
Bilateral lesions of auditory cortex
Akinetic mutism
Bilateral ventromedial frontal regions
Or
Fronto-diencephali connections
Lack of motivation plus bradykinesia
Bipallidal lesion
Lack of motivation plus bradyphrenia
Bifrontal lesions
Reduced attention to c/l visual environment
Frontal eye field
Bowel and bladder incontinence
Or
Frequency & urgency of urination
Either posterior part of superior frontal gyrus, anterior cingulate gyrus and intervening white matter
Gait ataxia or gait apraxia
Basal ganglia and its connections with the frontal lobes
Pseudobulbar palsy, tetraparesis
Bilateral motor cortices