Descending propriospinal axons in the hindlimb enlargement of the red‐eared turle: Cells of origin and funicular courses
@article{Berkowitz1994DescendingPA,
title={Descending propriospinal axons in the hindlimb enlargement of the red‐eared turle: Cells of origin and funicular courses},
author={Ari Berkowitz and Paul S G Stein},
journal={Journal of Comparative Neurology},
year={1994},
volume={346}
}Spinal neurons with descending axons are important components of spinal sensorimotor networks. We used an anatomical tracing technique to study the distribution of descending propriospinal axons and cell bodies in red‐eared turtles. We injected horseradish peroxidase into a portion of one funiculus in the middle of the hindlimb enlargement and examined six spinal segments rostral to the injection site (dorsal 3 through dorsal 8) for labeled neuronal cell bodies.
35 Citations
Activity of descending propriospinal axons in the turtle hindlimb enlargement during two forms of fictive scratching: broad tuning to regions of the body surface
- BiologyThe Journal of neuroscience : the official journal of the Society for Neuroscience
- 1994
Recordings of descending propriospinal axons at the caudal end of a seven-segment turtle spinal cord preparation suggest that selection of the appropriate form of scratching, rostral or pocket, may be mediated by populations of broadly tuned neurons rather than by highly specialized neurons.
Propriospinal projections to the ventral horn of the rostral and caudal hindlimb enlargement in turtles
- BiologyBrain Research
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Propriospinal neurons in the C1-C2 spinal segments project to the L5-S1 segments of the rat spinal cord
- BiologyBrain Research Bulletin
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Bilateral projection of neurones of the C6 segment to S1 and S2 segments of the spinal cord in the cat.
- BiologyActa neurobiologiae experimentalis
- 1997
Sacral projections of neurones located in the C6 segment of the spinal cord were electrophysiologically investigated in anaesthetized cats and indicated the importance of these neurones for interlimb coordination.
Monosynaptic connections between primary afferents and giant neurons in the turtle spinal dorsal horn
- BiologyExperimental Brain Research
- 2004
Light microscope studies combining Nissl stain and transganglionic HRP-labeling of the primary afferents have revealed the occurrence of axosomatic and axodendritic contacts between labeled boutons and giant neurons.
Physiology and morphology indicate that individual spinal interneurons contribute to diverse limb movements.
- Biology, PsychologyJournal of neurophysiology
- 2005
It is suggested that diverse vertebrate limb movements are produced by spinal cord interneuronal networks that include some shared components.
Somato-dendritic morphology predicts physiology for neurons that contribute to several kinds of limb movements.
- BiologyJournal of neurophysiology
- 2006
This work reports here the first description of a class of spinal interneurons whose somato-dendritic morphologies predict their robust activity during multiple forms of ipsilateral and contralateral fictive hindlimb scratching and fictive Hindlimb withdrawal.
Activity of descending propriospinal axons in the turtle hindlimb enlargement during two forms of fictive scratching: phase analyses
- BiologyThe Journal of neuroscience : the official journal of the Society for Neuroscience
- 1994
A model illustrates that a population of propriospinal neurons, each of which is broadly tuned to a region of the body surface and is rhythmically activated in a constant phase of the hip control cycle, could mediate the selection and generation of rostral scratching and pocket scratching.
Immunohistochemical Expression of Synaptophysin in the Adult and Developing Cervical and Lumbar Enlargements of the Spinal Cord of Rabbit.
- Biology
- 2018
In adult, profuse SynpIR appeared in the entire grey matter, and stained dendrites departed from neurons in the lateral laminae into the adjacent funiculi as finger-like projections, and its differential expression levels is specific and almost completed before birth.
Spinal Motor Patterns in the Turtle a
- BiologyAnnals of the New York Academy of Sciences
- 1998
Bilateral midbody stimulation in D3‐end turtles evokes reconstruction of rhythmic alternation between intact side hip flexors and extensors because one‐site stimulation in this preparation activates only hip flexor rhythms.
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Activity of descending propriospinal axons in the turtle hindlimb enlargement during two forms of fictive scratching: broad tuning to regions of the body surface
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Recordings of descending propriospinal axons at the caudal end of a seven-segment turtle spinal cord preparation suggest that selection of the appropriate form of scratching, rostral or pocket, may be mediated by populations of broadly tuned neurons rather than by highly specialized neurons.
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