TBL 4 Flashcards
Peripheral visual field info goes where in cortex?
Anterior occipital lobe
Macular visual field info goes where in cortex?
Occipital pole
Lesion at optic chiasm causes?
Bitemporal hemianopsia
Thalamus projets to auditory cortex via?
Auditory radiation
Weber test
Midline
Rinne test
Mastoid process
Info travels from vestibular nucleus to thalamus via?
Where in cortex does vestibular info project?
Lateral lemniscus
Insular cortex
Praxis
Ability to perform learned, purposeful movements
Paratonia
Patients unable to relax muscles voluntarily. Gets worse w/ concentration.
What causes paratonia?
Lesion in frontal association cortex
Correcting info from lateral cerebellum projects from deep cerebellar nuclei to thalamus via?
Dentatothalamic tract
Dysmetria
Missing target w/ hand / finger
Rigidity
Velocity-independent hypertonia
Dyskinesias
Involuntary abnormal movements or postures w/o weakness such as tremors, chorea, athetosis, myoclonus, ballism, or tics
Dystonia
involuntary sustained contraction of one or more muscles causing abnormal movement or posture
Multifactorial abnormal gait
Hesitant, short-striding, unsteady gait on normal base. Usually due to mild dysfunction of multiple sensory systems and musculoskeletal system
What causes subcortical somatosensory loss syndrome?
Lesion to VPL / VPM affects face, arm, and leg
What causes subcortical weakness syndrome?
Lesion to corona radiata, internal capsule, cerebral peduncles, or upper basis pontis
Lesion to which area may cause hemineglect?
Parietal multimodal association cortex in non-dominant hemisphere
Anterior cingulate cortex is important for what?
Mainly motivation. Also cognition and emotion.
Where does the arcuate fasciculus run?
Insular cortex
Medial parietal syndrome
Contralateral leg somatosensory problems
Anosognosia
Unawareness of deficit
Damage to what area causes astereognosis or agraphesthesia
Association sensory cortex
Lesion to medial frontal lobe causes (4 things)?
CONTRA leg UMN signs (primary cortex), apraxia (association cortex), cognitive / emotional problems including motivation, attention and executive function (anterior cingulate / prefrontal cortex).
Lesion to lateral frontal lobe causes (7 things)?
CONTRA UMN signs for face and arm, dysarthria / dysphagia, apraxia, IPSI gaze preference / CONTRA gaze paresis (frontal eye field), expressive aphasia, expressive aprosodia, cognitive / emotional problems including motivation, attention, and executive function (PFC).
Which artery supplies internal capsule and basal ganglia?
Middle cerebral artery
Which artery supplies thalamus?
Posterior cerebral artery
Occlusion of which cerebral arteries are common?
Middle and posterior are common
Anterior is uncommon
Transient monocular visual loss due to retinal artery occlusion is called?
Amaurosis fugax
What sxs commonly occur w/ lacunes (3 things)?
Subcortical weakness (internal capsule), subcortical somatosensory (thalamus). Dysarthria and clumsy hand syndrome due to anterior pons.
What are lacunes?
Small subcortical cerebral artery occlusions
