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32 Cards in this Set
- Front
- Back
- 3rd side (hint)
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function of spinothalamic tract (anterolateral)
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pain and temperature, light touch
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function of dorsal columns
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pressure, vibration, touch, proprioception
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function of lateral corticospinal tract
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voluntary motor
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body region for rubrospinal tract
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flexion, limbs
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facilitates the flexion and inhibits the extension in the upper extremities.
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function of vestibulospinal tract
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head and neck, balance, extension
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originates from the vestibular nuclei of the medulla, which conducts information from the vestibular labyrinth in the inner ear.
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function of tectospinal tract
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head and eye control
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function of reticulospinal tract
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gait
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cell body location in motor tract
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primary motor cortex (UMN)
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decussation of motor tract
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85% in caudal medulla (pyramids)
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first synapse of motor tract
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cell body of anterior horn of the spinal cord
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second synapse of motor tract
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neuromuscular junction (LMN)
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nerve ending in spinothalamic tract (pain/temp)
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A-delta and C fibers, with cell body in DRG
enters spinal cord |
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first synapse of spinothalamic tract
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ipsilateral grey matter
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decussation of spinothalamic tract
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anterior white commissure, ascends contralaterally
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second synapse of spinothalamic tract
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VPL of thalamus, travels on to sensory cortex
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cell body of dorsal columns
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DRG, enters spinal cord in dorsal column (pacinian corpuscles, meissner's corpuscles)
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first synapse of dorsal columns
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nucleus cuneatus/gracilis in medulla
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decussation of dorsal columns
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medulla, carries on to medial lemniscus
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second synapse of dorsal columns
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VPL of thalamus, on to sensory cortex
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UMN lesion signs
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weakness, hyper-reflexia, hypertonia, Babinski, spastic paralysis
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LMN lesion signs
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weakness, atrophy, fasciculation, hypo-reflexia, hypotonia
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spinal findings in polio/werdnig-hoffman
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destruction of anterior horn cells
flaccid paralysis LMN lesion only |
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spinal findings in MS
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usually white matter of cervical spine, though is random and assymetric due to myelination
scanning speech, intention tremor, nystagmus |
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spinal findings in ALS
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UMN and LMN sparing sensory
anterior horn/lateral tracts |
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occlusion of anterior spinal artery
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spares dorsal columns and tract of lissauer
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spinal and clinical features of tabes dorsalis
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degeneration of dorsal roots and dorsal columns
impaired proprioception, locomotor ataxia |
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spinal findings in syringomyelia
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crossing fibers of spinothalamic tract damaged
bilateral loss of pain and temp touch is spared seen in Arnold Chiari |
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spinal finding in B12 neuropathy and friedreich's ataxia
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demyelination of dorsal columns, lateral tracts and spinocerebellar tracts
ataxic gait, hyper-reflexia, impaired position and vibratory sense |
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spinal findings in syringomyelia
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crossing fibers of spinothalmic tract are damaged
loss of pain/temp, spares touch in UE (atrophy of hand muscles) common in arnold chiari (C8-T1) |
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findings in tabes dorsalis
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argyll robinson pupils (reactive to accomodation, not light)
areflexia of DTRs charcot's joints (can't feel) shooting pain |
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features of brown-sequard syndrome
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hemisection of spinal cord
ipsilateral UMN below lesion ipsilateral loss of dorsal columns below lesion ipsilateral loss of sensation at level of lesion contralateral loss of pain and temp below lesion LMN signs at level of lesion |
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triad of horner's syndrome
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ptosis
anhidrosis on affected side miosis brown-sequard, pancoast, syringomyelia |
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