The spino‐bulbar tracts and the pelvic sensory vagus. Further contributions to the theory of the sensory dual innervation of the viscera,

Kuru, Masaru

doi:10.1002/cne.901040203

Cited by 42 publications

(9 citation statements)

References 10 publications

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“…In the present study, transection of the dorsal funiculus did not affect reflex micturition in decerebrate cats, suggesting that the PMC does not receive afferent fibers directly from the dorsal system. Vesicosensory pathways have been reported in the dorsal funiculus [13] or in the region anterior to the equatorial line of the spinal cord [14]. Hattori et al [15] stated that bladder sensation was often compromised in the tabes dorsalis, which mainly affects the dorsal funiculus of the spinal cord.…”

Section: Discussionmentioning

confidence: 99%

Effect of Injury to the Dorsal Funiculus of the Thoracic Spinal Cord on Micturition in Decerebrate and Freely-Moving Cats

Sugaya¹,

Ogawa²,

Hatano³

et al. 1999

Urol Int

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Bladder sensation is transmitted both via the spinothalamic tract in the lateral funiculus and the dorsal system in the dorsal funiculus. We transected the dorsal funiculus in 10 female cats to clarify the functional roles of these two ascending pathways. The dorsal funiculus was transected at T10 in 5 decerebrate and 5 freely-moving cats, and micturition parameters were compared before and after transection. Transection of the dorsal funiculus did not affect any of the parameters of reflex micturition in the 5 decerebrate cats. Within 1 week after transection, 4 of the 5 freely-moving cats used the normal micturition posture, but the remaining one performed micturition in a prone position as if she had lost micturition sensation. All 5 cats urinated with a normal micturition posture by 2 weeks after transection. The mean single voided volume was decreased transiently up to 1 week, but returned to normal by 2 weeks after transection. None of the 5 cats had any residual urine before and after transection. Both the ascending and descending limbs of the micturition reflex pass through the lateral funiculus. Bladder sensation is transmitted both via the spinothalamic tract coursing in the lateral funiculus and the dorsal system in the dorsal funiculus. The dorsal system may play a major role in the transmission of bladder sensation to the cerebral cortex, but may not be essential.

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Section: Discussionmentioning

confidence: 99%

Effect of Injury to the Dorsal Funiculus of the Thoracic Spinal Cord on Micturition in Decerebrate and Freely-Moving Cats

Sugaya¹,

Ogawa²,

Hatano³

et al. 1999

Urol Int

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“…Anterograde degeneration studies (Ebbesson 1969Hayle 1973a,b, R. temporaria; for an older Marchi study, see Kuru 1956) showed that in anurans two systems of ascending spinal projections are found: (a) a primary afferent ascending spinal projection via the dorsal funiculus to the dorsal column nucleus and (b) a secondary afferent projection via the lateral funiculus, i.e. the spinal lemniscus, to the reticular formation, mesencephalon, and possibly to the thalamus.…”

Section: Ascending Spinal Pathwaysmentioning

confidence: 99%

Anurans

Donkelaar¹

1998

The Central Nervous System of Vertebrates

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“…Spinosolitary projections passing via the dorsolateral funiculus were observed in reptiles (Ebbesson, 1967(Ebbesson, , 1969Pedersen, 1973), in birds (Karten, 1963;Funke and Necker, 1986;Funke, 1988), and in mammals (e.g., Kuru, 1956;Hazlett et al, 1972;McMahon and Wall, 1983;Apkarian et al, 1985;Menétrey and Basbaum, 1987). Although in mammals the bulk of spinal projections to the reticular formation ascends via the anterolateral system (see Mehler, 1969;Willis and Coggeshall, 1991), ascending projections to different parts of the lateral reticular zone via the dorsolateral funiculus were demonstrated (e.g., Zemlan et al, 1978;Blomqvist and Berkley, 1992).…”

Section: A Comparison Of Spinal Ascending Pathways In Vertebratesmentioning

confidence: 99%

Spinal ascending pathways in amphibians: Cells of origin and main targets

Muñoz

González

et al. 1997

J. Comp. Neurol.

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As part of a research program on the evolution of somatosensory systems in vertebrates, the various components of ascending spinal projections were studied with in vivo and in vitro tract-tracing techniques in representative species of amphibians (the large green frog, Rana perezi, the clawed toad, Xenopus laevis and the ribbed newt, Pleurodeles waltl). Three main ascending sensory channels, each with largely separate targets, were demonstrated: 1. Ascending projections via the dorsal funiculus include primary and nonprimary projections that ascend to terminate mainly in the dorsal column nucleus at obex levels. A small component ascends farther rostralwards to terminate in the reticular formation, the octavolateral area, the trigeminal nuclear complex, and in the granular layer of the cerebellum. 2. Projections ascending via the dorsolateral funiculus reach other spinal and supraspinal targets than the dorsal funicular fibers, mainly ipsilaterally. At upper cervical cord and obex levels, many fibers innervate a region considered the amphibian homologue of the lateral cervical nucleus of mammals. In the medulla, these fibers ascend ventral to the descending trigeminal tract to terminate in the dorsal column and the solitary tract nuclei, and more rostrally, in the reticular formation, the descending trigeminal nucleus and the medial aspect of the ventral octaval nucleus. Major projections reach the area between the facial motor nucleus and the ventral octaval nucleus, and a mediolateral subcerebellar band. These projections arise in neurons located mainly in the ipsilateral deep dorsal and lateral fields throughout the spinal cord. 3. Ascending spinal projections via the ventral quadrant of the spinal cord (the ventral and ventrolateral funiculi) ascend throughout the brainstem up to the diencephalon. Along its course, this component innervates various parts of the reticular formation, the octavolateral area, the granular layer of the cerebellum, the region ventromedial and ventrolateral to the isthmic nucleus, and the subcerebellar region. In the mesencephalon, the torus semicircularis, the midbrain tegmentum and, sparsely, the tectum mesencephali are innervated. Beyond the midbrain, various dorsal and particularly ventral thalamic nuclei and the posterior tubercle are innervated by this ascending sensory channel. The cells of origin of some of these projections were observed in the dorsal, and to a lesser extent, in the lateral and ventral spinal fields of the spinal cord. Evidence for the presence of these three main ascending sensory channels throughout vertebrates will be discussed. The presence of such channels appears to be a shared character in the brain of both amniotes and anamniotes.

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The spino‐bulbar tracts and the pelvic sensory vagus. Further contributions to the theory of the sensory dual innervation of the viscera,

Cited by 42 publications

References 10 publications

Effect of Injury to the Dorsal Funiculus of the Thoracic Spinal Cord on Micturition in Decerebrate and Freely-Moving Cats

Effect of Injury to the Dorsal Funiculus of the Thoracic Spinal Cord on Micturition in Decerebrate and Freely-Moving Cats

Anurans

Spinal ascending pathways in amphibians: Cells of origin and main targets

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