Výsledky vyhledávání - "S. J. Shefchyk"

Sacral dorsal horn neurone activity during micturition in the cat

Publikováno v: The Journal of Physiology. 551:387-396

The excitability of two groups of neurones located in different parts of the sacral spinal cord were examined during micturition in decerebrate adult cats. One group of cells, characterized by their activation by pudendal cutaneous afferents, was loc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::888c8a2445ebc43a7662b80a1e434b16
https://doi.org/10.1113/jphysiol.2003.041996

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Sacral spinal interneurones and the control of urinary bladder and urethral striated sphincter muscle function

Autor: S. J. Shefchyk

Publikováno v: The Journal of Physiology. 533:57-63

Normally, during bladder filling (continence) and expulsion (micturition) there is a reciprocity between the pattern of activity in the urinary bladder sacral parasympathetic efferents and the somatic motoneurones innervating the striated external ur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6aad3812f5ef89bd841bca989f92f785
https://doi.org/10.1111/j.1469-7793.2001.0057b.x

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Non‐linear membrane properties of sacral sphincter motoneurones in the decerebrate cat

Autor: K. L. Paroschy, S. J. Shefchyk

Publikováno v: The Journal of Physiology. 523:741-753

1. Responses to pudendal afferent stimulation and depolarizing intracellular current injection were examined in sacral sphincter motoneurones in decerebrate cats. 2. In 16 animals examined, 2-10 s trains of electrical stimulation of pudendal afferent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ee1bc5626e8b9e7e4844cd50edfc58b
https://doi.org/10.1111/j.1469-7793.2000.00741.x

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Depression of muscle and cutaneous afferent‐evoked monosynaptic field potentials during fictive locomotion in the cat

Autor: I. Jimenez, Marie-Claude Perreault, David A. McCrea, S. J. Shefchyk

Publikováno v: The Journal of Physiology. 521:691-703

It has been estimated that during locomotion in the cat, muscle afferents in a single limb would produce as many as 800 000 discharges per second (Prochazka & Gorassini, 1998). Such intense sensory feedback could trigger inappropriate reflex response

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eaa2a039cd9df0e1b3a199875b5e80a1
https://doi.org/10.1111/j.1469-7793.1999.00691.x

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Excitability changes in sacral afferents innervating the urethra, perineum and hindlimb skin of the cat during micturition

Autor: R. R. Buss, S. J. Shefchyk

Publikováno v: The Journal of Physiology. 514:593-607

During micturition, activity in the external urethral sphincter (EUS) is suppressed at the same time that the sacral parasympathetic system is producing the bladder contraction. This decreased activity is partly mediated by postsynaptic inhibition of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::174a635caac497446ec603a04218ec22
https://doi.org/10.1111/j.1469-7793.1999.593ae.x

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Urethral pudendal afferent-evoked bladder and sphincter reflexes in decerebrate and acute spinal cats

Autor: S. J. Shefchyk, R.R Buss

Publikováno v: Neuroscience Letters. 244:137-140

Electrical stimulation of the urethral sensory pudendal nerve in decerebrate or acute spinal cats was used to evoke micturition reflexes in animals that failed to respond to bladder distension. In the decerebrate animals, stimulation of urethral affe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a93e2c58cb162d60456e0f7814696ed5
https://doi.org/10.1016/s0304-3940(98)00155-4

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Large reductions in composite monosynaptic EPSP amplitude following conditioning stimulation are not accounted for by increased postsynaptic conductances in motoneurons

Autor: D.A. McCrea, Peter L. Carlen, S. J. Shefchyk

Publikováno v: Neuroscience Letters. 109:117-122

A compartmental neuronal model was used to show that increased compartmental leak conductances distal to the site of excitatory postsynaptic potential (EPSP) generation have little effect on EPSP amplitude but decrease half-width markedly. Using intr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1b81eb91b91b341e04a0facb01d8330
https://doi.org/10.1016/0304-3940(90)90548-n

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Plateau potentials and membrane oscillations in parasympathetic preganglionic neurones and intermediolateral neurones in the rat lumbosacral spinal cord

Autor: D, Derjean, S, Bertrand, F, Nagy, S J, Shefchyk

Publikováno v: The Journal of physiology. 563(Pt 2)

Whole-cell patch recordings were made from parasympathetic preganglionic neurones (P-PGNs) and unidentified intermediolateral (IML) neurones in thick slices of the lower lumbar and sacral spinal cord of 14- to 21-day-old rats. The P-PGNs and IML neur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::84443e7965da78b35466bd108ae4498d
https://pubmed.ncbi.nlm.nih.gov/15618277

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Chapter 6 Spinal cord neural organization controlling the urinary bladder and striated sphincter

Autor: S. J. Shefchyk

The storage and elimination of urine requires the coordination of activity between the autonomic nervous system (thoracolumbar sympathetic and sacral parasympathetic divisions) controlling the urinary bladder and urethra and the lumbosacral somatic m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce198f233865cd51dc3d520f586b032a
https://doi.org/10.1016/s0079-6123(02)37008-0

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