1.%20Motor_Start%20_%20Intro

1.%20Motor_Start%20_%20Intro - Motor Disorders Motor Crazy...

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11/14/2009 1 Motor Crazy 2009 Dr Brett Lil ie 2009 Motor Disorders Weakness UMNL or LMNL Involuntary Uncoordinated Clumsiness a. Basal Ganglia b.Cerebellum c.Unclassifiable Dr Brett Lil ie 2009 Dr Brett Lil ie 2009 Lower Motor Neuron 4 Features…. 1. Weakness 2. Decreased DTR’s 3. Wasting 4. Fibrillation’s Dr Brett Lil ie 2009 Upper Motor Neuron Lesion 1. Weakness 2. Wasting 3. DTR’s 4. Tone 5. Superficial Reflexes /absent Dr Brett Lil ie 2009 Extrapyramidal System Phylogenetically older system then the Pyramidal System (important in lower animals) Dampens erratic movements, maintains muscle tone and truncal stability Complex system of loops Dr Brett Lil ie 2009
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11/14/2009 2 Vestibular System Dr Brett Lil ie 2009 Vestibular System Lateral Vestibular Tract = Equilibrium Vestibulocular tr. = Saccadic eye mvt Vestibulocortical = Dizziness Dr Brett Lil ie 2009 Brain Stem Motor tract’s Lateral Pathways Medial Pathways Rubrospinal Reticulospinal Vestibulospinal Tectospinal (coord hd + eye mvt) distal limb mvt axial + Proximal (maintain posture) muscles Dr Brett Lil ie 2009 Dr Brett Lil ie 2009 Brain Stem 1. Ventral = Motor Middle = Sensory Dorsal = Cranial N. 2. Extrapyramidal run across all Cb layers Vestibular Dr Brett Lil ie 2009 Clues Visual loss plus pituitary malfunction suggests lesion in suprasellar region. 5,7 & 8 together with I/L Cb inco-ord suggests lesion in Cerebellopontine angle. Dr Brett Lil ie 2009
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11/14/2009 3 CN 3 palsy Common Note M. Gravis (next Lect.), Horner’s Syndrome. Cause post communicating a. anerysm (v. painful) Diabetes (pupil usually normal) Complete is with; ptosis, pupil dilatation, weakness eye mvt Dr Brett Lil ie 2009 Tentorial herniation supratentorial structures pushed opp. Side eg CN 3 (long course) 2. Inferomed cerebral hemisphere pushed thru Tentorial hiatus
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1.%20Motor_Start%20_%20Intro - Motor Disorders Motor Crazy...

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