Abstract：
:The structures and distribution of encapsulated muscle receptors were examined in serial transverse sections of flexor carpi radialis in the adult cat. Four types of receptors (muscle spindles, Golgi tendon organs, paciniform, and Pacinian corpuscles) were identified. Their structures resembled those encountered in other limb muscles. Pacinian corpuscles were rare and occurred only in the external fascial coat of the muscle near its origin. The other three receptor types were distributed in an uneven but consistent pattern throughout the muscle. As noted previously (Gonyea and Ericson, '77), spindles were largely confined to a deep muscle region comprising less than 20% of the muscle volume, located directly between the long tendon of origin and the tendon of insertion. This region contains the largest proportion of type SO muscle fibers (Gonyea and Ericson, '77). Tendon organs and paciniform corpuscles were concentrated along the tendons that lined the spindle-rich muscle region. This region appeared to be composed of extrafusal fibers that were shorter and of more oblique pinnation than those in other regions. The localization of muscle receptors to the "oxidative" core of the muscle in its direct line of pull may have functional implications for afferent input to the spinal cord which are discussed. In addition, the possibility is raised that there are more paciniform corpuscles in flexor carpi radialis (and possibly other muscles) than previously thought.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Richmond FJ,Stuart DGdoi
10.1002/jmor.1051830102subject
Has Abstractpub_date
1985-01-01 00:00:00pages
1-13issue
1eissn
0362-2525issn
1097-4687journal_volume
183pub_type
杂志文章abstract：:Gross and histological examination of all extant families of turtles revealed that the buccopharyngeal mucosa is morphologically highly varied. The tongues of aquatic species have small lingual papillae or lack them entirely, while terrestrial species have tongues with numerous glandular papillae. The pharynx and the ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051960105
更新日期：1988-04-01 00:00:00
abstract：:The structure of contact chemoreceptors in the cibariopharyngeal pump of the moth Trichoplusia ni (Lepidoptera: Noctuidae) is described. Two types of receptors designated A and B are located on the floor of the pump. Two groups of 9-12 A receptors are located in the anterior part of the pump, and two groups of two B r...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051600103
更新日期：1979-04-01 00:00:00
abstract：:We hypothesized that due to the relative conductivity of the environment, and to maintain sensory function, ampullary organs of marine Neoarius graeffei would differ morphologically from those described previously for estuarine and freshwater conspecifics. Unlike the ampullary systems of N. graeffei from freshwater an...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20396
更新日期：2015-09-01 00:00:00
abstract：:The spinotectal somatosensory projection was compared in normal, genetically eyeless, and embryonically manipulated salamanders. In normal animals, serotonin fluorescence was restricted to the intermediate tectalneuropil. This same region showed both high levels of serotonin uptake and somatosensory single unit electr...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051700105
更新日期：1981-10-01 00:00:00
abstract：:The site and process of urine formation in the renopericardial system of Helisoma have been investigated. Osmotic pressure and protein content of hemolymph from the heart, pericardial fluid from the pericardial cavity, prourine from the kidney sac, and urine from the ureter have been determined. Osmotic pressure is eq...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051690209
更新日期：1981-08-01 00:00:00
abstract：:To investigate whether the thickness of the cornea in snakes correlates with overall anatomy, habitat or daily activity pattern, we measured corneal thickness using optical coherence tomography scanning in 44 species from 14 families (214 specimens) in the collection at the Natural History Museum (Denmark). Specifical...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21094
更新日期：2020-02-01 00:00:00
abstract：:Detailed descriptions of mammalian sperm morphology across a range of closely related taxa are rare. Most contributions have been generalized descriptions of a few distantly related mammalian species. These studies have emphasized a generalized ungulate sperm morphology, but have not underscored several important morp...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10297
更新日期：2005-02-01 00:00:00
abstract：:Among species of the Chiroptera, spermatogenesis and the fully differentiated spermatozoa differ in morphological and ultrastructural detail. This study therefore aimed to ultrastructurally characterize the spermatogenesis and the spermatozoa of Carollia perspicillata (Phyllostomidae) and compare the process with othe...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20202
更新日期：2014-01-01 00:00:00
abstract：:Sipuncula is a clade of unsegmented marine worms that are currently placed among the basal radiation of conspicuously segmented Annelida. Their new location provides a unique opportunity to reinvestigate the evolution and development of segmented body plans. Neural segmentation is clearly evident during ganglionic ven...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21054
更新日期：2019-11-01 00:00:00
abstract：:The development of two of the cranial lateral line canals is described in the cichlid, Archocentrus nigrofasciatus. Four stages of canal morphogenesis are defined based on histological analysis of the supraorbital and mandibular canals. "Canal enclosure" and "canal ossification" are defined as two discrete stages in l...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10045
更新日期：2003-01-01 00:00:00
abstract：:Slender blindsnakes (Leptotyphlopidae) are known to use a unique feeding mechanism that involves rapid flexions of the tooth-bearing lower jaw. However, the morphology of the leptotyphlopid jaw apparatus has remained poorly studied due to the extremely small size of these snakes. Here I present a detailed description ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10414
更新日期：2006-04-01 00:00:00
abstract：:Cetacean middle ears are unique among mammals in that they have an elongated tympanic membrane, a greatly reduced manubrium mallei, and an incudal crus longum that is shorter than the crus breve. Elongation of the tympanic membrane and reduction of the manubrium is thought to be related to an evolutionary rotation of ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1044
更新日期：2001-08-01 00:00:00
abstract：:Interspecific variations in rhabdom structure between various oplophorid shrimps are described and the differences are related to the light environment at different depths within the mesopelagic zone. The ultrastructure of the distal rhabdom in these species is described for the first time. Quantitative measurements s...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10103
更新日期：2003-07-01 00:00:00
abstract：:Scanning electron microscopy reveals that the flat tongue of Platemys pallidipectoris has shallow grooves and no lingual papillae. The surface of the tongue is covered with dome-shaped bulges, each corresponding to a single cell. Short microvilli are distributed over the cell surface. Light microscopy shows a stratifi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052260303
更新日期：1995-12-01 00:00:00
abstract：:The strongly modified mode of development of the small and brooding galeommatoid bivalve Lasaea adansonii (Gmelin, 1791) [syn. Lasaea rubra (Montagu, 1803)] has been studied by means of transmission and scanning electron microscopy and by fluorescent staining of the muscular system and of two neurotracers, FMRFamide a...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10623
更新日期：2008-06-01 00:00:00
abstract：:The development of diet-induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar numbers of four sens...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10026
更新日期：2002-11-01 00:00:00
abstract：:Liolaemus elongatus (Liolaemidae) is a viviparous, mainly lecithotrophic species with placental structures specialized for uptake of oxygen and inorganic nutrient transport. An allantoplacenta and an omphaloplacenta are present during early embryonic stages (25-28) and there is a moderate distension of the uterine wal...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10632
更新日期：2008-07-01 00:00:00
abstract：:The hypochord of the zebrafish embryo (Danio rerio) emerges at the 9-somite stage as a single row of cells in the dorsomedial endoderm immediately ventral to the notochord. It is recognizable from the 2(nd) or 3(rd) somite and extends along the trunk to the same extent as the somites. A basal lamina surrounds the hypo...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(200006)244:3<167::AID-JMOR
更新日期：2000-06-01 00:00:00
abstract：:In the present investigation the right intracranial portion of the trochlear nerves and dorsal oblique muscle of the right ocular globe were removed from six adult dogs and analyzed by light and electron microscopy. Unmyelinated fibers were observed in the analyzed nerves. The number, diameter, area, and density of my...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10271
更新日期：2004-12-01 00:00:00
abstract：:Sceloporus aeneus exhibits reproductive bimodality. That is, one taxon (Sceloporus aeneus bicanthalis) is viviparous whereas the other (Sceloporus aeneus aeneus) is oviparous. Morphological differences in luteal and oviductal structure were examined. Oviparous and viviparous females have distinct corpora lutea that fo...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051840109
更新日期：1985-04-01 00:00:00
abstract：:The differences in angulation and length observed for the fibers of anatomical muscles may reflect two distinct mechanical requirements: arrangement for pinnation, reflecting an increase in physiological cross-section and arrangement for equivalent placement of sarcomeres, possibly associated with coordination. The ob...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051920106
更新日期：1987-04-01 00:00:00
abstract：:Cytoplasmic microtubules can be divided into two subpopulations: 1) those adjacent to the nucleus (perinuclear), and 2) those distributed between the myofilament bundles (nonperinuclear). Previous observations (Cartwright and Goldstein, '83) indicate total cytoplasmic microtubule numeric density increases to a maximum...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051790103
更新日期：1984-01-01 00:00:00
abstract：:Sexual dimorphism in the distribution of antennal sense organs is common among adults of the genus Periplaneta. In three out of the four strains of Periplaneta americana examined, adult males had more contact chemoreceptros than females. In the fourth strain of P. americana and in P. australasiae, P. brunnea, P. fulig...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051490202
更新日期：1976-06-01 00:00:00
abstract：:Swimming crabs of the taxon Portunoidea show specialized, paddle-shaped fifth pereiopods (P5), which play a role in these crabs' ability to swim. In this study, the morphology of the fifth pereiopod in swimming and non-swimming crabs was studied in detail and the mobility in the articulations between podomeres was cal...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21268
更新日期：2020-12-01 00:00:00
abstract：:Mature spermatozoa from spermathecae of founding queens were obtained from 5 species of ants, representing the major subfamilies Myrmicinae (Acromyrmex versicolor, Crematogaster sp.) and Dolichoderinae (Tapinoma sessile, Conomyrma insana, Conomyrma wheeleri). The ultrastructure of ant spermatozoa has many features in ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052060311
更新日期：1990-12-01 00:00:00
abstract：:Three regions of the byssus of the marine mussel Mytilus edulis L. are distinct in structural organization at the macroscopic and microscopic level and in amino acid composition. The threads that emanate from the stem at the base of the foot are divided into two regions. The proximal, elastic region has a crimped, den...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051890305
更新日期：1986-09-01 00:00:00
abstract：:Serial sections were used to map the ventrally positioned neurons of the anterior nerve cord of a 12.5-day amphioxus larva from the infundibular region to the end of somite 2. Synaptic patterns reveal five categories of descending pathways, four of which are associated with the ventral compartment (VC) motoneurons res...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10114
更新日期：2003-08-01 00:00:00
abstract：:The structural organization of the spermatozoon from the Eurasian beaver, Castor fiber (Family: Castoridae), was determined and compared to that of other sciuromorph rodents. The beaver spermatozoon has a head, which is variable in form but usually paddle-shaped, with a small nucleus and very large acrosome, and a tai...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10544
更新日期：2007-08-01 00:00:00
abstract：:Shape and age variation in dentition of Paleogene extinct native South American ungulates (Notoungulata) has been traditionally described using qualitative and quantitative approaches, and has played a controversial role in the systematics of several groups. Such is the case of the Notopithecidae, a group of notoungul...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20766
更新日期：2018-02-01 00:00:00
abstract：:The skull of the rare bolyeriid snake Casarea dussumieri is described in detail based on high-resolution X-ray CT data. Bolyeriids are unique in their possession of a separate suborbital ossification and a maxilla subdivided into two movably jointed parts, which may be the result of paedomorphic truncation of the deve...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10519
更新日期：2007-05-01 00:00:00
