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28 Cards in this Set
- Front
- Back
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Where the first neuron of the spinocerebellar tract is is located?
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in the dorsal root ganglion
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Where the second neuron of the spinocerebellar tract is located?
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Clarke’s nucleus or lamina VI
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What happens if dorsal and ventral spinocerebellar tracts are damaged?
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Friedrich's ataxia
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In Frederick’s ataxia which tracts are involved?
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Ventral and dorsal spinocerebellar
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Name three different components of corticobulbar tract?
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Corticobulbar tracts connect the cerebral cortex with three different components of the brain stem (1) cranial nerve nuclei (2) red nucleus (3) reticular formation
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Name the structures that the axon of upper motor neuron traverses before its crossing at the lower border of the medulla oblongata?
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1.internal capsule
2.midbrain 3.pons medulla oblongata |
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What is the name of the corticospinal tract in the lateral funiculus of the spinal cord?
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Lateral corticospinal tract
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What happens when the lateral corticospinal tract is cut?
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It results in spasticity and hyperreflexia. If it is below medulla it is same side, above medulla opposite side, babinskis reflex
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What are the signs of upper motor neuron disease?
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Spastic paralysis
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Where the lower motor neuron is situated?
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Brain stem
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What are the signs of lower motor neuron disease?
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Flaccid paralysis
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What is the other name for medial reticulospinal tract?
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Pontine reticulospinal tract
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Which neurons are stimulated by the medial reticulospinal tract?
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Gamma motor neurons
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What is the other name for lateral reticulospinal tract?
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medullary reticulospinal tract)
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Which tract helps in the reflex adjustment of the head?
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medial vestibulospinal tract
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Which tract activates the muscles involved in the balance and gravity control?
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Medial reticulospinal tract is also called the pontine reticulospinal tract
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Name the tract which begins in the superior colliculus of the midbrain?
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Tectospinal tract
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Which tract helps in turning the head and eyes to the appropriate point in the space?
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Tectospinal tract
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Name all the medial motor tracts?
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Anterior corticospinal( 9 in the image below) (Uncrossed)
Medial and lateral vestibulospinal Medial and lateral reticulospinal Tectospinal Medial longitudinal fasciculus |
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What do the medial motor tracts control?
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BALANCE
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What are the lateral motor tracts?
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1.Lateral corticospinal
Rubrospinal |
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What do the lateral motor tracts control?
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Movement of contralateral limbs
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What are the important four structures involved in the hemisection of the spinal cord?
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1.lateral corticospinal tract
2.dorsal column/funiculus lateral spinothalamic tract |
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What are the clinical signs when the lateral corticospinal tract is involved?
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ipsilateral spastic paresis below the level of lesion
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What are the clinical signs when the posterior funiculus is involved?
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ipsilateral loss of joint position sense, tactile discrimination and vibration
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What are the clinical signs when the anterolateral tract is involved?
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contralateral loss of pain and temperature one or two segments below the level of the lesion.
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What are the clinical signs when the lower motor neurons of ventral horn area involved?
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flaccid paralysis1.muscle atrophy
2.fasciculations 3.areflexia (absence of reflexes) |
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The hemisection of the spinal cord is also known as what syndrome?
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Brown Sequard
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