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14 Cards in this Set
- Front
- Back
Which is likely to lose sensation first in syringomyelia, arms or hands?
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Arms
(Syringomyelia is a cyst within the spinal cord and as such affects more medial structures first) |
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What are the characteristics of Brown-Sequard syndrome
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Contralateral loss of pain and temperature (beginning one or two segments below hemisection)
Ipsilateral loss of touch and proprioception Ipsilateral spastic paralysus |
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Which sensory modality uses the fastest axons?
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Proprioception
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Fibres from the dorsal columns after synapsing form the...
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Medial Lemniscus
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The last synapse of somatosensory tract fibres before the cerebral cortex occurs in...
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Ventroposterior nucleus of the thalamus
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Site where the dorsal column-medial lemniscus system crosses the midline...
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medulla (via internal arcuate fibres)
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Site where spinothalamic tract axons cross the midline...
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Anterior white commisure
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Where is the cortical area representing touch sensation?
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Postcentral gyrus of parietal lobe
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What are the properties of Pacinian Corpuscle?
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Fast Adapting
Large Receptive Field Detect Vibration |
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What are the properties of Ruffini's endings?
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Slow Adapting
Large Receptive Field |
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What are the properties of Messner's corpuscle?
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Fast Adapting
Small Receptive Field |
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What are the properties of Merkels Disk?
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Slow adapting
Small Receptive Field |
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Through which pathway does touch and vibration travel in the spine?
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Dorsal Column Medial Lemniscal Pathway
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Where does the primary somatosensory cortex S1 receive inputs from?
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Ventral Posterior Nucleus of Thalamus
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