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Flashcards in Neuro Deck (77)
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31

If the lateral cerebellum is damaged, what is usually seen?

Tendency to fall toward injured side

32

Hemiballismus keywords

wild arm flailing
contralateral subthalamic nucleus lesion

33

Chorea

dance-like, jerky, purposeless movement
lesion of basal ganglia

34

Athetosis

slow writing snake-like movement
lesion of basal ganglia

35

Dystonia

sustained involuntary mm. contraction
e.g. writer's cramp, blepharospasm

36

Intention tremor keywords

slow, zigzag motion when pointing toward a target
indicative of a cerebellar lesion

37

What happens at lesion of Right Parietal lobe?

Spatial neglect syndrome: agnosia of contralateral side

38

What happens at lesion of Reticular Activating system?

Decreased wakefulness

39

What happens at lesion of Mammillary Bodies?

Wernicke-Korsakoff Syndrome

40

What happens at lesion of cerebellar hemisphere?

Intention tremor, limb ataxia, loss of balance

41

What happens at lesion of cerebellar vermis?

Truncal ataxia

42

What happens at lesion of subthalamic nucleus?

Contralateral hemiballismus

43

What happens at lesion of frontal eye fields?

Eyes look toward lesion

44

What is cerebral perfusion primarily driven by?

PCO2

45

Middle Cerebral a.

What does it supply?

S&S?

Supplies lateral cortex

Motor and sensory to Upper Limb and face, Wernicke's Temporal and Broca's Frontal

Homonymous Hemianopsia
Paralysis of Gaze
Global aphasia
Contralateral Hemispatial Neglect

46

Anterior Cerebral a.

What does it supply?

Supplies anteromedial cortex

Motor and sensory to Lower Limb

Contralateral paralysis and loss of sensation lower limb

47

Anterior Spinal A.

What does it supply?

Lateral Corticospinal Tract, Medial Lemniscus, Caudal medulla/Hypoglossal n.

Contralateral hemiparesis Lower Limb, proprioception, ipsilateral tongue deviation

48

Posterior Inferior Cerebellar a.

What does it supply?

Lateral medulla

Dysphagia, hoarseness, (nucleus ambiguus lesions, essentially), ipsilateral Horner's, decreased pain and temp contralateral limb, ipsilateral face

Lateral Medullary Wallenberg's Syndrome. The side of the face is the side that PICA is involved.

49

Anterior Inferior Cerebellar a.

What does it supply?

Lateral pons (Cranial n. nuclei, Vestibular nuclei, Facial Nucleus, Spinal trigeminal nucleus, cochlear nuclei, sympathetic fibers)

- facial paralysis, dec. lacrimation, dec tongue taste ant. 2/3, decreased corneal reflex

Lateral Pontine Syndrome "Facial droop means AICA's pooped"

50

Posterior communicating a.

common site of berry aneurysm

CN3 palsy (eye down and out with ptosis and mydriasis)

51

Werdnig Hoffman Disease

AR degeneration anterior horn of spinal cord --> LMN lesion

"Floppy baby", death by 7 mo

52

Friedreich's Ataxia

AR GAA repeat encoding Frataxin --> impaired mitochondrial functioning -->

staggering gait, frequent falls, loss of proprioception and vibration, very high foot arch, loss of DTRs

53

What nuclei are located in the midbrain?

CN 3, 4

54

What nuclei are located in the pons?

CN 5 - 8

55

What nuclei are located in the medulla?

CN 9, 10, 12

56

Cavernous Sinus Syndrome S&S

What CN run through?

ophthalmoplegia and decrease corneal and maxillary sensation

CN 3, 4, V1, V2, 6

57

What happens in a CN V motor lesion?

Jaw deviates toward side of lesion

58

What happens in a CN X lesion?

Uvula deviates AWAY from side of lesion

59

Conductive Hearing Loss
e.g. otitis media, cerumen impaction, osteoma, neoplasm

Rinne abnormal (bone>air), Weber localizes to affected ear

60

Sensorineural Hearing Loss
e.g. trauma, Meniere's, presbycusis, Ototoxicity

Rinne normal (air>bone), Weber localizes to UNaffected ear