Variations of lumbrical muscle innervation patterns in the hand, focusing on the dual innervation of the third lumbrical muscle

2016 ◽  
Vol 55 (2) ◽  
pp. 160-165 ◽  
Author(s):  
Mi-sun Hur
Keyword(s):  
The Third ◽  
Innervation Patterns ◽  
Muscle Innervation ◽  
Lumbrical Muscle

Lumbrical Muscles Neural Branching Patterns: A Cadaveric Study With Potential Clinical Implications

Hand ◽  
2020 ◽  
pp. 155894472096388
Author(s):  
Michele R. Colonna ◽  
Maria Piagkou ◽  
Andrea Monticelli ◽  
Cesare Tiengo ◽  
Franco Bassetto ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Cadaveric Study ◽  
Flexor Digitorum Profundus ◽  
Branching Patterns ◽  
Fresh Frozen ◽  
Innervation Patterns ◽  
Muscle Innervation ◽  
Lumbrical Muscle ◽  
Lumbrical Muscles ◽  
Flexor Digitorum

Background Lumbrical muscles originate in the palm from the 4 tendons of the flexor digitorum profundus and course distally along the radial side of the corresponding metacarpophalangeal joints, in front of the deep transverse metacarpal ligament. The first and second lumbrical muscles are typically innervated by the median nerve, and third and fourth by the ulnar nerve. A plethora of lumbrical muscle variants has been described, ranging from muscles’ absence to reduction in their number or presence of accessory slips. The current cadaveric study highlights typical and variable neural supply of lumbrical muscles. Materials Eight (3 right and 5 left) fresh frozen cadaveric hands of 3 males and 5 females of unknown age were dissected. From the palmar wrist crease, the median and ulnar nerve followed distally to their terminal branches. The ulnar nerve deep branch was dissected and lumbrical muscle innervation patterns were noted. Results The frequency of typical innervations of lumbrical muscles is confirmed. The second lumbrical nerve had a double composition from both the median and ulnar nerves, in 12.5% of the hands. The thickest branch (1.38 mm) originated from the ulnar nerve and supplied the third lumbrical muscle, and the thinnest one (0.67 mm) from the ulnar nerve and supplied the fourth lumbrical muscle. In 54.5%, lumbrical nerve bifurcation was identified. Conclusion The complex innervation pattern and the peculiar anatomy of branching to different thirds of the muscle bellies are pointed out. These findings are important in dealing with complex and deep injuries in the palmar region, including transmetacarpal amputations.

scholarly journals Evolutionary aspects on the origin, distribution and ramifications of the ischiadicus nerve in the giant anteater (Myrmecophaga tridactyla)

2019 ◽  
Vol 71 (4) ◽  
pp. 1149-1157
Author(s):  
L.A. Ribeiro ◽  
L.P. Iglesias ◽  
F.O.C. Silva ◽  
Z. Silva ◽  
L.A. Santos ◽  
...  
Keyword(s):  
Lumbar Vertebrae ◽  
Biceps Femoris ◽  
Lumbosacral Plexus ◽  
Spinal Nerves ◽  
The Third ◽  
Recent Position ◽  
Muscle Innervation ◽  
The Right ◽  
Tensor Fasciae Latae ◽  
Evolutionary Aspects

ABSTRACT This work aimed to describe the origin, distribution, and ramifications of the ischiadicus nerve in the giant anteater and to provide anatomical data which could explain not only the evolutionary aspects but also provide important information for other related works. For the present study, four specimens were used, prepared by perfusion of 10% formaldehyde solution via the femoral artery, for conservation and dissection. The origin of the right and left ischiadicus nerves in the giant anteater from the ventral ramification of the third lumbar (L3) and the first (S1), second (S2), and third (S3) sacral spinal nerves. These nerves were symmetrical in all animals studied. The distribution and ramification occurred to the superficial, middle, and deep gluteal, gemelli, piriform, quadratus femoris, tensor fasciae latae, caudal crural abductor, cranial and caudal parts of the biceps femoris, adductor, semitendinous, and cranial and caudal parts of the semimembranous muscles. Based on the origins of the ischiadicus nerves, there is a caudal migration in the nerve location in animals in a more recent position on the evolutionary scale due to reconfiguration of the lumbosacral plexus, resulting from the increase in a number of lumbar vertebrae. There is no complete homology of the muscle innervation.

scholarly journals Innervation Patterns of the Lumbrical Muscles of the Foot in Human Fetuses

2019 ◽  
Vol 110 (3) ◽  
Author(s):  
Betül Asena Kara ◽  
Deniz Uzmansel ◽  
Orhan Beger
Keyword(s):  
Morphological Properties ◽  
Flexor Hallucis Longus ◽  
Human Fetuses ◽  
Flexor Digitorum Longus ◽  
Longus Tendon ◽  
Innervation Patterns ◽  
Lumbrical Muscle ◽  
Lumbrical Muscles ◽  
Flexor Digitorum ◽  
Communicating Branches

Background We sought to describe the innervation patterns of the foot lumbrical muscles and their morphological properties in human fetuses and to define the communicating branches between the medial (MPN) and lateral (LPN) plantar nerves, which play a part in the innervation of those muscles. Methods Thirty formalin-fixed fetuses (13 male and 17 female) with a mean ± SD gestational age of 25.5 ± 3.8 weeks (range, 18–36 weeks) from the inventory of the Mersin University Faculty of Medicine Anatomy Department were bilaterally dissected. Innervation patterns of the lumbrical muscles and the communicating branches between the MPN and the LPN were detected and photographed. Results No variations were seen in lumbrical muscle numbers. In the 60 feet, the first lumbrical muscle started directly from the flexor digitorum longus tendon in 48 and from the flexor hallucis longus slips in addition to the flexor digitorum longus tendon in 12. Fifty-five feet had the classic innervation pattern of the lumbrical muscles, and five had variations. No communicating branches were seen in 48 feet, whereas 12 had connections. Conclusions This study classified innervation patterns of the foot lumbrical muscles and defined two new innervation types. During surgeries on the foot and ankle in neonatal and early childhood terms, awareness of the communicating branches between the MPN and the LPN and innervation of the intrinsic muscles of the foot, such as the lumbrical muscles, might aid in preventing possible complications.

Digital Innervation Patterns Following Median or Ulnar Nerve Laceration and their Correlation to Anatomic Variations of the Communicating Branch Between these Nerves

2004 ◽  
Vol 29 (4) ◽  
pp. 351-355 ◽  
Author(s):  
J. PETER W. DON GRIOT ◽  
J. JORIS HAGE ◽  
PETER J. M. DE GROOT
Keyword(s):  
Ulnar Nerve ◽  
Ring Finger ◽  
Nerve Transection ◽  
Anatomic Variations ◽  
The Third ◽  
Communicating Branch ◽  
Innervation Patterns ◽  
The One

The midline of the ring finger is classically considered as the neural watershed between the median and ulnar nerve sensory territories on the palmar surfaces of the fingers. Variations of this division exist and may be explained by a communicating branch between the third and fourth common digital nerves. The palmar sensibility patterns of fingers were assessed with Semmes Weinstein filaments after either a complete median or an ulnar nerve transection in 43 patients. Eight out of nine observed sensibility patterns could be explained by known anatomic types and subtypes of the communicating branch. The type of communicating branch, but not its subtype, could be established in the one remaining pattern.

scholarly journals Popliteus muscle. An anatomical study

10.3823/2581 ◽  
2018 ◽  
Vol 11 ◽  
Author(s):  
Ivan Dario Quintero
Keyword(s):  
Morphological Characteristics ◽  
Anatomical Study ◽  
Cross Sectional Study ◽  
Posterior Aspect ◽  
Cross Sectional ◽  
Semimembranosus Tendon ◽  
Innervation Patterns ◽  
Muscle Innervation ◽  
Popliteus Muscle ◽  
Made In

Background: The popliteus muscle fulfills a function of rotational stabilizer of the knee. Its particular shape and innervation pattern are the interest of anatomists and surgeons. The aim of this work was characterizing the anatomy and innervation of the popliteus muscle of knees from a sample of mestizo-raced population, predominant in Latin America.   Methods: This cross-sectional study was made in 23 knee segments 14 right knees and 9 left knees coming from 14 men and 9 women aged 67 ± 22 years.   Results: The popliteus muscle presented a scalene-like triangle shape and its medial base was covered by the superficial expansion of the semimembranosus tendon. The length of its base was 79,2±12,8 mm with a superior and inferior side that measured 58.0±7.4 mm and 101.7±11.7 mm respectively. The popliteus muscle innervation was supplied by the tibial nerve (TN) by the arising of two branches in 22 cases (95.7%). The first branch arose proximal to the inter articular line and presented a length of 91,1 mm. The second branch arose distally to the inter articular line with a length of 48.4±1.3mm. The third was observed in just one case (4.3%) Its length was 108±1.1mm and it arose distally to the inter articular line.   Conclusions: The morphological characteristics of the popliteus muscle and its innervation patterns found in our study differ from what was reported in previous studies. The presence of these findings can be considered during the planning of surgical procedures in the posterior aspect of the knee.

scholarly journals Temporalis muscle innervation patterns are generally conserved across subjects

2011 ◽  
Vol 25 (S1) ◽  
Author(s):  
Jonathan Wisco ◽  
David Cantelmi ◽  
Joel Davies ◽  
Jayc Sedlmayr ◽  
Anne Agur
Keyword(s):  
Temporalis Muscle ◽  
Innervation Patterns ◽  
Muscle Innervation

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

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