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StomatologyRetrograde axonal transport of horseradish peroxidase in sensory nerves and ganglion cells of the rat
202
balance between large-fiber and small-fiber activity via a postsynaptic inhibitory mechanism acting on the nociceptive relay neurons (marginal cells).
Suprascapular
entrapment
L. J. Clein, J. Neurosurg.,
neuropathy 43 (1975) 337-342
Attention is drawn to chronic entrapment of the supr~capular nerve as an unusual cause of pain in the shoulder, amenable to electrodia~osti& assessment and to successful surgical decompression. Five cases are reported in detail. Previous trauma to the shoulder or arm was a consistent feature and the presenting complaint was pain in every case. Pain radiated variably and was aggravated by the use of the shoulder joint. Wasting of spinati with weakness of external rotation of the shoulder and normal sensation were the rule. Normal X-ray films of cervical spine dispelled possible confusion with cervical root disease. Electromyography showed signs of denervation in spinati. Motor conduction latencies are not described and might have assisted localization. Four patients failed to respond to conservative treatment. They were all free from pain following release of the supr~~apu1~ nerve as it passed beneath the transverse scapular ligament. Obvious naked eye indications of nerve compression are stated at least for one case. An interesting comparative anatomical review is briefly made.
STOMATOLOGY Retrograde axonal transport ganglion cells of the rat L. Furstman,
S. Saporta
of horseradish
peroxidase
in sensory nerves and
and L. Kruger, Brain Res., 84 (1975) 320-324
This paper is the first to demonstrate the use of the retrograde transport of horseradish peroxidase (HRP) for identifying the cell bodies of first order afferents located in the trigeminal and dorsal root ganglia. The pulp cavity of one or more teeth in rats was injected on one side of the mouth. In addition the rat sciatic nerve was cut above the knee and immersed in HRP. After 24 and 48 h survival periods, peroxidase reaction product was found in some cells in the ipsilateral trigeminal ganglion and throughout the extent of the ipsilateral dorsal root ganglion. Greater uptake was seen in sensory ganglia after 48 h survival periods. Very little HRP was tr~sported beyond the cell body into the dorsal root. The method may prove to be useful for tracing the central connections of groups of identified receptor types.
balance between large-fiber and small-fiber activity via a postsynaptic inhibitory mechanism acting on the nociceptive relay neurons (marginal cells).
Suprascapular
entrapment
L. J. Clein, J. Neurosurg.,
neuropathy 43 (1975) 337-342
Attention is drawn to chronic entrapment of the supr~capular nerve as an unusual cause of pain in the shoulder, amenable to electrodia~osti& assessment and to successful surgical decompression. Five cases are reported in detail. Previous trauma to the shoulder or arm was a consistent feature and the presenting complaint was pain in every case. Pain radiated variably and was aggravated by the use of the shoulder joint. Wasting of spinati with weakness of external rotation of the shoulder and normal sensation were the rule. Normal X-ray films of cervical spine dispelled possible confusion with cervical root disease. Electromyography showed signs of denervation in spinati. Motor conduction latencies are not described and might have assisted localization. Four patients failed to respond to conservative treatment. They were all free from pain following release of the supr~~apu1~ nerve as it passed beneath the transverse scapular ligament. Obvious naked eye indications of nerve compression are stated at least for one case. An interesting comparative anatomical review is briefly made.
STOMATOLOGY Retrograde axonal transport ganglion cells of the rat L. Furstman,
S. Saporta
of horseradish
peroxidase
in sensory nerves and
and L. Kruger, Brain Res., 84 (1975) 320-324
This paper is the first to demonstrate the use of the retrograde transport of horseradish peroxidase (HRP) for identifying the cell bodies of first order afferents located in the trigeminal and dorsal root ganglia. The pulp cavity of one or more teeth in rats was injected on one side of the mouth. In addition the rat sciatic nerve was cut above the knee and immersed in HRP. After 24 and 48 h survival periods, peroxidase reaction product was found in some cells in the ipsilateral trigeminal ganglion and throughout the extent of the ipsilateral dorsal root ganglion. Greater uptake was seen in sensory ganglia after 48 h survival periods. Very little HRP was tr~sported beyond the cell body into the dorsal root. The method may prove to be useful for tracing the central connections of groups of identified receptor types.