Neuro 19:review And Lesions

Front 1

Describe the findings of spinal cord hemisection (Brown-Sequard Syndrome). Give a rationale for each finding

Back 1

alternating sensory loss 1. loss of discrim. ipsilaterally b/c of damage to posterior column which does not cross until medulla 2. Loss of pain/ temp on contralateral side due to damage to anterolateral tract which crosses immediately

Front 2

An alternating sensor loss in discrim touch on one side and pain temp on the other sid eusually indicates what type of leison

Back 2

unilateral hemisection

Front 3

what would be the result of a leison above the caudal medulla

Back 3

contralateral loss of both pain and fine disrcim. from the body Both pathways have now crossed (dorsal crosses in caudal medullaanterolateral crosses in spinal cord

Front 4

what would be the result of a lesion of the VPL

Back 4

contralateral loss of both pain and fine disrcim. from the body Both pathways have now crossed (dorsal crosses in caudal medullaanterolateral crosses in spinal cord

Front 5

what would be the result of a lesion of the VPM

Back 5

contralateral loss of both pain and fine disrcim. from the face (the major fine touch cross in the pons, the mnor and pain pathways cross in the caudal medulla)

Front 6

What would be the result of a lesion to the cortex

Back 6

contralateral loss of pain and temp, pathways have crossed

Front 7

a Rhizotomy is a clincally induced lesion that severes the dorsal root(s) in several dermatomes. What would be the result of this procedure

Back 7

Loss of fine touch, and pain and temp from innervated dermatome

Front 8

A cordotomy is the surgical cutting of anterolateral fiber tracts in the spinal cord 2-3 segments rostral to the dermatome where the highest level of pain begins. What would be the result of this procedure

Back 8

Loss of pain and temperature on both sides, note pain can return in 6 months via other pathways

Front 9

Peripheral nerve lesions usually produce which characteristic deficit

Back 9

"glove and stocking", lack of fine discrim, pain ,temp in skin only in parts of limbs

Front 10

Complete cord transection will result in

Back 10

bilateral loss of all sensation below the lesion

Front 11

Anterior cord syndrome is a lesion of the anterolateral quadrants cause dby fractured vertebrae or infact from ASA emoblism. What would you find

Back 11

bilateral loss of pain and temp below lesion but fine discrim OK

Front 12

Posterior cord syndrome is a lesion of teh dorsal columns that can result from trauma, compression from tumors, syphillis. What would you find

Back 12

Bilateral loss of fine discrim but pain and temp OK

Front 13

A central cord syndrome (syringomyelia) producing a small leison would result in

Back 13

damage to anterolateral fibers that cross the spinal cord in the anterior commisure, usually only affects dematomes of spinal segments that have lesion, usually affects cervical cord= "cape like" sensory loss of pain and temp bilaterally, fine discrim ok

Front 14

A central cord syndrome producing a large lesion would result in

Back 14

same as form small (cape like pain and temp loss) due to anterolateral column damage across anterior commisure but alos damage to dorsal colums=loss of fine touch, may also affect ventral horns resulting in motor neuron loss. May have sacral sparing of anterolateral tracts

Front 15

Describe the deficits of a unilateral lesion in the primary SI cortex

Back 15

contralateral loss of fine discrim and pain/temp from body and or face b/c 3rd order thalamic nuclei from both VPL and VPM project here

Front 16

Describe the deficits associated with a brain stem lesion in the lateral medulla

Back 16

Loss of pain and temp of contralateral body (anterolateral pathway crossed way back in spinal cord, only if medial lemniscus is affected), pain and temp in face on both sides because ipsilateral tract is decending through the medulla and the contralateral tract is ascending