The efferent innervation of the suboccipital muscles in the guinea pig: A study with retrograde transport of horseradish peroxidase

Hiller, Maria-Sophie; Prihoda, Manfred; Heller, Thomas

doi:10.1016/0304-3940(91)90133-e

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…The ventromedial nucleus. Motoneurons supplying dorsal suboccipital muscles were found in and around the ventromedial nucleus, as has been reported previously for cats and other species (Gordon et al, 1991;Hiller et al, 1991). However, multiple-labelling methods showed that RCP motoneurons occupied a more ventral cell column than medial OCS and CM.…”

Section: Topographical Organization Of Motor Nucleisupporting

confidence: 80%

“…Furthermore, Gordon and Richmond (1991) also found suboccipital motoneurons outside of the ventromedial nucleus as far dorsally as the central commissure. For the guinea pig, motoneurons supplying RCP and OC muscles were reported to occupy a single column in the ventromedial nucleus, although a few "ectopic" motoneurons were also noted on the medial wall of the ventral horn (Hiller et al, 1991). In all of these descriptions, the overlapping organization of the motor nuclei has been emphasized.…”

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confidence: 99%

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Distribution of motoneurons supplying dorsal and ventral suboccipital muscles in the feline neck

Kitamura

Richmond

1994

J of Comparative Neurology

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A combination of retrograde tracers was used to compare the relative distributions of motoneurons supplying the ventral and lateral suboccipital muscles, rectus capitis anterior (RCA), and rectus capitis lateralis (RCL), with those supplying dorsal muscles, including rectus capitis posterior muscles (RCP), complexus (CM), and the medial head of obliquus capitis superior (OCS). Three of the tracers, horseradish peroxidase, fluororuby, and fluorescein-conjugated dextran, were applied to cut nerve ends. Fast blue was applied by intramuscular injection, and fluorogold was delivered both by injection and by cut nerve exposure. Motoneurons supplying RCA and RCL were clustered on the medial wall of the ventral horn in a restricted region defined previously as the commissural nucleus. Labelled cells supplying RCL were confined to the C1 segment, but those supplying RCA were distributed from C1 to rostral C4. Motoneurons supplying RCA tended to lie more dorsomedially than those supplying RCL, but there was substantial overlap between the two populations. Motoneurons supplying dorsal muscles had a separate, more ventral distribution. RCP motoneurons were located primarily in the ventromedial nucleus, but a small proportion of cells was found in the white matter of the ventral funiculus or the gray matter surrounding the central canal. Motoneurons supplying CM and OCS were located dorsomedially to the RCP cell population. These results suggest that neck motoneurons are arranged according to a "musculotopic" pattern in which dorsal muscles have the most ventral locations, and progressively more lateral and then ventral muscles are layered dorsomedially along the medial wall of the ventral horn.

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Section: Topographical Organization Of Motor Nucleisupporting

confidence: 80%

mentioning

confidence: 99%

Distribution of motoneurons supplying dorsal and ventral suboccipital muscles in the feline neck

Kitamura

Richmond

1994

J of Comparative Neurology

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Central projections of cervical primary afferent fibers in the guinea pig: An HRP and WGA/HRP tracer study

Prihoda

Hiller

Mayr

1991

J of Comparative Neurology

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The central course and the projections of the first and the second cervical dorsal root ganglia and of suboccipital muscle primary afferent fibers in the guinea pig were studied by means of anterograde transport of wheat germ agglutinin conjugated to horseradish peroxidase (WGA/HRP) or aqueous solution of horseradish peroxidase (HRP). Injections of WGA/HRP into the second cervical dorsal root ganglion produced labeling in the dorsal and ventral horns. Within the spinal cord, the largest amount of HRP reaction product was found within the lateral third of the substantia gelatinosa and within the central cervical nucleus. The main area of termination in the medulla was the external cuneate nucleus. However, HRP reaction product was also found within the medial and inferior vestibular nuclei, cell group x, the perihypoglossal nuclei, the nucleus of the solitary tract, and the nucleus of the spinal trigeminal tract. Descending fibers could be detected as caudal as spinal segment T5. Injections of WGA/HRP into the first cervical dorsal root ganglion produced heavy terminal label within the central cervical nucleus but not within the substantia gelatinosa. Again, the external cuneate nucleus was the main area of termination within the medulla. Label could not be observed within the vestibular nuclear complex or within the spinal trigeminal nucleus. Injections of aqueous HRP into the suboccipital muscles produced heavy transganglionic label within the central cervical nucleus, whereas the substantia gelatinosa totally lacked terminal label. Ascending proprioceptive fibers reached the external cuneate nucleus and group x. Scanty projections could be detected within the vestibular nuclei as well as within the perihypoglossal nuclei except for the nucleus prepositus hypoglossi. Label was absent in the spinal trigeminal nucleus.

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Morphological analysis of neck muscle nerves and neurons in cats

Sasaki¹,

Shinji²,

Sato³

2023

Tissue and Cell

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The efferent innervation of the suboccipital muscles in the guinea pig: A study with retrograde transport of horseradish peroxidase

Cited by 3 publications

References 12 publications

Distribution of motoneurons supplying dorsal and ventral suboccipital muscles in the feline neck

Distribution of motoneurons supplying dorsal and ventral suboccipital muscles in the feline neck

Central projections of cervical primary afferent fibers in the guinea pig: An HRP and WGA/HRP tracer study

Morphological analysis of neck muscle nerves and neurons in cats

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