clinical notes - cerebellum Flashcards
ipsilateral to cerebellar lesion
ataxia
what are the 2 crosses in ataxia
decussation of the superior cerebellar peduncle
corticospinal tract- pyramidal decussation; rubrospinal tract–ventral tegmental decussation
Midline lesions of the vermis or flocculonodular lobe mainly cause ________
unsteady gait (truncal ataxia) and eye movement abnormalities
Lesions lateral to the cerebellar vermis mainly cause _____
ataxia of the limbs (appendicular ataxia)
Dysrhythmia
abnormal timing
abnormal rhythm and timing of movements
Dysmetria
abnormal trajectory through space
abnormal over or undershoot (past pointing) during movement towards a target
Wide based, unsteady, drink like gait; diff sitting w/o support
Vermian Lesion Truncal Ataxia
Appendicular ataxia
ataxia on movement of extremities
cerebellar hemisphere lesion (Intermediate and Lateral zones)
SSx of cerebellar disorders
Nausea
Vomiting
Vertigo
Slurred speech
Unsteadiness
Incoordination
Ipsilateral headache in occipital, frontal, and upper cervical areas
Tonsillar herniation- decreased consciousness, brainstem findings, hydrocephalus or head tilt
Hypotonia
Peduncular reflex
Tests for Appendicular Ataxia
precision finger tap
heel tapping
Dysdiadochokinesia
Overshoot or loss of check (rebound)
Tests for Truncal Ataxia
Wide based, unsteady gait
Tandem gait
Romberg gait
Titubation- midline cerebellar lesions
what is Postural tremor
Irregular large amplitude
Occurs when the limb muscles are activated to hold a particular position- for example, both arms held outstretched
Action tremor or intention tremor
Appendicular ataxia during movements towards a target
Eye movement problems
Ocular dysmetria - saccades overshoot or undershoot target
Slow saccades or jerky saccadic intrusions
Nystagmus
speech Abnormalities
Scanning or explosive speech- irregular fluctuations in rate and volume
Slurred speech
