Central projection of sensory fibers from the cat knee joint

Clark, F. J.

doi:10.1002/neu.480030202

Cited by 33 publications

(6 citation statements)

References 25 publications

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“…In addition, we have confirmed the results of the little known study by Clark (1972) concerning the projection of fibres of the posterior nerve to the knee joint within the dorsal columns. Our results are entirely in accordance with his findings.…”

Section: Recordings From Non-muscular Nervessupporting

confidence: 88%

“…There have been several detailed studies of the dorsal column projection of primary afferent fibres of cutaneous (Brown, 1968;Petit & Burgess, 1968;Horch, Burgess & Whitehorn, 1976) and of articular origin (Gardner, Latimer & Stilwell, 1949;McIntyre, 1962a;Burgess & Clark, 1969;Clark, 1972). However, similar investigations of the projection of muscle afferent fibres have not yet been performed.…”

Section: Introductionmentioning

confidence: 99%

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The dorsal column projection of muscle afferent fibres from the cat hindlimb.

Fern

Harrison

Riddell

1988

The Journal of Physiology

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SUMMARY1. The extent of the projection of hindlimb muscle afferent fibres ascending the dorsal eolumns has been studied in barbiturate-anaesthetized cats. This has been investigated using electrical stimulation of the dorsal columns at different spinal levels while recording from (i) peripheral muscle nerves, and (ii) single muscle afferent fibres within the dorsal columns. These two approaches have produced complementary results.2. The conduction velocity of both group I and group II afferent fibres decreased progressively after entering the dorsal columns.3. The majority of group I and group II fibres project at least as far as L2 but leave the dorsal columns at or before the lower thoracic segments.4. By taking advantage of the lower electrical threshold of Ia compared to lb fibres in the hamstring nerves, it could be shown that both I a and I b fibres leave the dorsal columns at similar locations.5. A small number of afferent fibres were found to project to Cl. On the basis of previous work it is likely that such fibres originate from Pacinian or paciniform corpuscles.

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Section: Recordings From Non-muscular Nervessupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

The dorsal column projection of muscle afferent fibres from the cat hindlimb.

Fern

Harrison

Riddell

1988

The Journal of Physiology

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“…A few joint activated cells were recorded from in nucleus Z. Their linkages to DLF and to DC fibres as well as their low thresholds suggest that Golgi tendon organ and/or joint ligament afferents and Ruffini afferents in the DLF and pacinian afferents in the DC are 391 H. JOHANSSON AND H. SILFVENIUS connected to the cells excited (Burgess & Clark, 1969;Clark, 1972;Clark et al 1973;Williams, BeMent, Yin & McCall, 1973). Presumably is there a sharp modality specificity present in these cells, as only one spike was discharged although the stimulation strength of the primary afferents was increased.…”

Section: Discussionmentioning

confidence: 95%

“…In the neurone illustrated in Fig. 8A, these afferents are possibly Golgi joint ligament afferents as the cell had a threshold of 1-2T and because of the fibres were located in the DLF (Burgess & Clark, 1969;Clark, 1972). Three DC-linked joint Z cells were encountered.…”

Section: Resultsmentioning

confidence: 99%

“…Of interest is to note that the DC linked cutaneous cells in nucleus Z responded to a single afferent volley with a sustained discharge, like that observed in segmental DSCT cells (Lundberg & Oscarsson, 1960 (Burgess & Clark, 1969;Clark, 1972;Clark et al 1973;Williams, BeMent, Yin & McCall, 1973). Presumably is there a sharp modality specificity present in these cells, as only one spike was discharged although the stimulation strength of the primary afferents was increased.…”

Section: Discussionmentioning

confidence: 99%

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Input from ipsilateral proprio‐ and exteroceptive hind limb afferents to nucleus Z of the cat medulla oblongata.

Johansson¹,

Silfvenius²

1977

The Journal of Physiology

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SUMMARY1. Extracellular recordings have been made from proprio-and exteroceptive neurones in nucleus Z of the cat medulla oblongata.2. Seventeen non-relay cells were excited by ipsilateral hind limb group I muscle afferents. Their functional properties were similar to those of the corresponding relay cells (Johansson & Silfvenius, 1977), i.e. activation by axon-collaterals of dorsolateral fascicle (DLF) fibres was observed, indicative of an input from the dorsal spinocerebellar tract (DSCT) to these neurones. The non-relay cells differed, however, from the relay cells in that a larger proportion of them were disynaptically connected to the spinal fibres. It is suggested that the non-relay cells by inhibition modulate the group I relay transmission in nucleus Z.3. Fifteen cells were excited by ipsilateral hind limb low threshold skin afferents with their spinal fibres at the first cervical segment located either in the DLF or in the dorsal column (DC). Evidence for a cutaneous hind limb bulbothalamic path independent of that of the DC and of the spinocervicolemniscal path is presented. 5. The topographical organization within nucleus Z and its input relation to the DSCT is discussed.

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Fibers in monkey posterior articular nerves

Gardner

Lenn

1977

Anat. Rec.

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The distribution of axons in the posterior articular nerves in rhesus monkey has been studied in terms of ratio of myelinated to unmyelinated fibers, and size of myelinated fibers. Conduction velocity measurements were also made. The nerves contained 2,000 to 2,200 unmyelinated fibers of 0.2 to 1.2 mum diameter. They contained 399 to 478 myelinated fibers, varying in size from 1.4 to 12.3 mum. Thus 80 to 85% of fibers in these nerves were unmyelinated. The maximum conduction velocity of 70 to 80 meters per second corresponded to an initial small deflection, with most fibers conducting at slower rates. These results are compared to previous reports which severely underestimated the number of unmyelinated fibers because electron microscope counts were not utilized. It is suggested that pain fibers from the knee joint of monkey make up much of this large population of unmyelinated axons. An unknown number of post-ganglionic sympathetic fibers is also included in the unmyelinated fiber group.

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Central projection of sensory fibers from the cat knee joint

Cited by 33 publications

References 25 publications

The dorsal column projection of muscle afferent fibres from the cat hindlimb.

The dorsal column projection of muscle afferent fibres from the cat hindlimb.

Input from ipsilateral proprio‐ and exteroceptive hind limb afferents to nucleus Z of the cat medulla oblongata.

Fibers in monkey posterior articular nerves

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