Location of the cutaneous trunci motor nucleus in the dog

Krogh, John E.; Towns, Lex C.

doi:10.1016/0006-8993(84)90970-3

Cited by 22 publications

(27 citation statements)

References 8 publications

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“…However, one of the most important muscles that elevates the tail is the cutaneus trunci muscle. The motoneurons of this muscle are not located in the lumbosacral cord but in the lower cervical and upper thoracic segments at the level of C8-T1 in the cat and the hamster (Holstege and Blok, 1989;Gerrits and Holstege, unpublished observations), at the level of C7-T2 in the dog (Krogh and Towns, 1984), and at Locations of abdominal, iliacus, and psoas motoneuronal cell groups as described by Gerrits et al (1997). Note that the photomicrographs represent one 50-µm section, and the drawings of the motoneuronal cell groups represent three plotted sections at the same level.…”

Section: Discussionmentioning

confidence: 98%

Descending projections from the nucleus retroambiguus to the iliopsoas motoneuronal cell groups in the female golden hamster: Possible role in reproductive behavior

Gerrits

Holstege

1999

J. Comp. Neurol.

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Section: Discussionmentioning

confidence: 98%

Descending projections from the nucleus retroambiguus to the iliopsoas motoneuronal cell groups in the female golden hamster: Possible role in reproductive behavior

Gerrits

Holstege

1999

J. Comp. Neurol.

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“…Although there is not enough information on the mechanical role of the TI for human ST muscle function, evidence from other muscles of the human body underlies the importance of compartmentalization for muscle function [Krogh and Towns, 1984;Richmond and Armstrong, 1988;Hijikata et al, 1992;Herring et al, 1993;Kamibayahsi and Richmond, 1998;Brown and McGill, 2009]. Particularly, some neck and trunk muscles display multiple long regions with in-series fibers which display multiple attachments to vertebrae or ribs, each innervated by a different bundle of motor axons [Krogh and Towns, 1984;Richmond and Armstrong, 1988;Hijikata et al, 1992;Herring et al, 1993].…”

mentioning

confidence: 99%

“…Particularly, some neck and trunk muscles display multiple long regions with in-series fibers which display multiple attachments to vertebrae or ribs, each innervated by a different bundle of motor axons [Krogh and Towns, 1984;Richmond and Armstrong, 1988;Hijikata et al, 1992;Herring et al, 1993]. This arrangement may allow integration of forces exerted by multiple regions as the muscles contract.…”

mentioning

confidence: 99%

In vivo and in vitro Examination of the Tendinous Inscription of the Human Semitendinosus Muscle

Kellis¹,

Galanis

Natsis

et al. 2011

Cells Tissues Organs

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The aim of this study was to examine the tendinous inscription (TI) of the human semitendinosus (ST) muscle using dissection (cadavers) and ultrasound (in vivo). Ultrasonography (US) scans were taken in 18 young males at rest and at maximum voluntary contraction (MVC). Further, the ST was dissected and removed from its origins in 10 cadaveric specimens (5 cadavers). The cadaveric long arm of the TI was 6.67 ± 0.64 cm (6.45 ± 1.21 in US) while the shorter arm was 2.39 ± 0.38 cm (1.99 ± 0.75 in US). The angle formed by the two TI arms ranged from 53.19 (US) to 56.05° (cadavers) while more superficial fascicles intersected the inscription at significantly higher angles (range 31.98 ± 6.15 to 34.69 ± 7.71°) compared with deeper fascicles (p < 0.05). Fascicle length did not differ between compartments, but it was significantly smaller in superficial compared with deeper layers (p < 0.05). With the exception of the angle between the TI arm and the deep aponeurosis, all measured angles as well as the length of the long arm of the TI increased significantly from rest to MVC (p < 0.05). The role of the TI probably lies in the local interconnections with the fascicles of either compartment, which upon contraction is such that the ST muscle contracts as one muscle. However, the TI arm morphology changes from rest to MVC, indicating a nonuniform displacement of the TI, mainly between the superficial and deeper layers of the muscle.

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“…The association between the loca tion of cervical motoneurons labeled in the present study and the muscles these neurons innervate in other mammals is more difficult to establish because of the relative paucity of studies of the musculotopic organization of brachial enlargement motor nuclei. However, the location of pla tysma II motoneurons in the ventromedial edge of the lat eral motor column in segments C l and C8 is similar to the location of motoneurons that innervate the cutaneous trunci muscle in rats [Baulac and Meinenger, 1981] and dogs [Krogh and Towns, 1984], To the extent that motor pool topography and nerve-muscle specificity is phylogenetically conserved, these innervation similarities suggest that part of platysma II in flying squirrels is homologous to ele ments of the cutaneous neck and trunk musculature of other mammals.…”

Section: Propatagial Innervationmentioning

confidence: 76%

Innervation of Propatagial Musculature in a Flying Squirrel, <i>Glaucomys volans </i>(Rodentia, Sciuridae)

Chickering¹,

Sokoloff²

1996

Brain Behav Evol

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The propatagium of gliding and flying mammals is of both functional and phylogenetic interest. The innervation of the propatagial muscle, platysma II, was studied with the axonal tracer wheat germ agglutinin-conjugated horseradish peroxidase (WGA-HRP) in a flying squirrel, Glaucomys volans. Injections of WGA-HRP into the proximal third of platysma II labeled motoneurons in the lateral part of the medial subdivision of the ipsilateral facial nucleus and in the ipsilateral ventral horn of the brachial enlargement. Injections into distal regions of platysma II labeled motoneurons in the ipsilateral ventral horn of spinal segments C5-C8 but not in the facial nucleus. Injections along the whole length of the muscle labeled afferent axons in the ipsilateral dorsal horn of spinal segments C4-T1. These results demonstrate a mixed facial and spinal motor innervation of propatagial musculature in the flying squirrel and indicate that this pattern of mixed innervation is more widespread among flying and gliding mammals than previously reported. Mixed facial and cervical propatagial innervation, independently derived in different flying and gliding mammals, may represent a common solution in the design of the propatagium. These findings complicate the use of propatagial muscle innervation patterns for the establishment of phylogenetic relationships among flying and gliding mammals.

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Location of the cutaneous trunci motor nucleus in the dog

Cited by 22 publications

References 8 publications

Descending projections from the nucleus retroambiguus to the iliopsoas motoneuronal cell groups in the female golden hamster: Possible role in reproductive behavior

Descending projections from the nucleus retroambiguus to the iliopsoas motoneuronal cell groups in the female golden hamster: Possible role in reproductive behavior

In vivo and in vitro Examination of the Tendinous Inscription of the Human Semitendinosus Muscle

Innervation of Propatagial Musculature in a Flying Squirrel, <i>Glaucomys volans </i>(Rodentia, Sciuridae)

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