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Cutaneous innervation

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https://www.readbyqxmd.com/read/29768404/tissue-specific-activities-of-the-fat1-cadherin-cooperate-to-control-neuromuscular-morphogenesis
#1
Françoise Helmbacher
Muscle morphogenesis is tightly coupled with that of motor neurons (MNs). Both MNs and muscle progenitors simultaneously explore the surrounding tissues while exchanging reciprocal signals to tune their behaviors. We previously identified the Fat1 cadherin as a regulator of muscle morphogenesis and showed that it is required in the myogenic lineage to control the polarity of progenitor migration. To expand our knowledge on how Fat1 exerts its tissue-morphogenesis regulator activity, we dissected its functions by tissue-specific genetic ablation...
May 16, 2018: PLoS Biology
https://www.readbyqxmd.com/read/29734141/innervation-of-the-human-incisive-papilla-comparison-with-other-oral-regions
#2
Chiaki Endo, Tadasu Sato, Takehiro Yajima, Kaoru Igarashi, Hiroyuki Ichikawa
Immunohistochemistry for several neurochemical substances was performed on the human incisive papilla and other oral structures. Sodium channel alpha subunit 7 (SCN7A) protein-immunoreactive (IR) Schwann cells and protein gene product 9.5 (PGP 9.5)-IR nerve fibers made nerve plexuses beneath the epithelium of the palate, including the incisive papilla, tongue, and lip. SCN7A immunoreactivity could also be detected in lamellated and nonlamellated capsules of corpuscle endings. Lamellated SCN7A-IR corpuscle endings were mostly restricted to the mucous and cutaneous lips...
May 7, 2018: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29644112/unusual-bilateral-sensory-innervation-of-the-dorsum-of-hand-by-lateral-antebrachial-cutaneous-nerve-a-case-report
#3
Neha, Hare Krishna
A 68-year-old male cadaver showed bilateral variation in the sensory innervation of the dorsum of hand. On the dorsum of right hand, first digit and lateral half of second digit were supplied by lateral antebrachial cutaneous nerve (LABCN); medial side of second digit and lateral side of third digit were supplied by superficial branch of radial nerve (SBRN) and medial side of third digit, the fourth and fifth digits were supplied by dorsal cutaneous branch of ulnar nerve (DBUN). On the dorsum of the left hand, lateral side of first digit was supplied by LABCN, medial side of first digit, the second and third digits as well as the lateral side of fourth digit were supplied by SBRN; medial side of fourth digit and fifth digit were supplied by DBUN...
March 2018: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/29619928/studies-of-upper-limb-pain-in-occupational-medicine-in-general-practice-and-among-computer-operators
#4
Jørgen Riis Jepsen
Diagnostic consensus criteria cannot be applied in a major proportion of patients with upper limb complaints, many of which are regarded as "non-specific". The three empirical studies in this thesis aimed to address this diagnostic challenge by incorporating representative neurological qualities in the physical examination.
Patterns of muscle weakness, sensory abnormalities and nerve trunk allodynia based on the nerves' topography and their motor and cutaneous innervation were defined to reflect peripheral nerve afflictions and their locations...
April 2018: Danish Medical Journal
https://www.readbyqxmd.com/read/29576124/cutaneous-innervation-of-the-hand-clinical-testing-in-volunteers-shows-high-intra-and-inter-individual-variability
#5
M Keplinger, P Marhofer, B Moriggl, M Zeitlinger, S Muehleder-Matterey, D Marhofer
BACKGROUND: Many clinicians require a solid understanding of the anatomical areas supplied by specific peripheral nerves. Virtually all pertinent medical textbooks claim that the entire (palmar and dorsal) surface of the hand is supplied by three (median, radial, and ulnar) nerves and that each of these covers a well-defined area. This study was designed to evaluate the sensory-distribution pattern of peripheral nerves in the hand. METHODS: Twelve volunteers were enrolled and randomly allocated to have median, ulnar, or radial nerve blocks to each hand on three successive days...
April 2018: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29515451/physical-exercise-induced-cardiovascular-and-thermoregulatory-adjustments-are-impaired-in-rats-subjected-to-cutaneous-artery-denervation
#6
Milene R Malheiros-Lima, Washington Pires, Ivana A T Fonseca, Julliane V Joviano-Santos, Anderson J Ferreira, Cândido C Coimbra, Nilo R V Lima, Samuel P Wanner
This study aimed to investigate the chronic effects of caudal artery denervation on morphometric parameters of the tail vascular smooth muscle and on physical exercise-induced thermoregulatory and cardiovascular adjustments in rats. Male Wistar rats were subjected to caudal artery denervation or the sham procedure. Approximately 26-28 days after these procedures, their thermoregulatory and cardiovascular parameters were evaluated at rest and during or following a fatiguing treadmill run. At the end of the experiments, the rats were euthanized, and samples of their tails were removed to evaluate morphometric parameters of the vascular smooth muscle surrounding the caudal artery...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29500895/determination-and-classification-of-cutaneous-innervation-of-dorsum-of-the-foot-in-fetal-cadavers
#7
Busra Candan, Soner Albay
BACKGROUND: The aim of this study is to determine of cutaneous innervation of dorsum of the foot on fetal cadavers. MATERIALS AND METHODS: In this study 200 limbs from 100 embalmed fetuses (54 males and 46 females) were studied in Anatomy Laboratory. Contributions of medial, lateral and intermediate dorsal cutaneous nerves (MDCN, LDCN and IDCN) of the foot were identified. FINDINGS: Cutaneous innervation of dorsum of the foot was classified into five Types...
March 3, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29479030/involvement-of-transient-receptor-potential-vanilloid-1-channel-expression-in-orofacial-cutaneous-hypersensitivity-following-tooth-pulp-inflammation
#8
Tetsuro Watase, Kohei Shimizu, Hiroki Komiya, Kinuyo Ohara, Koichi Iwata, Bunnai Ogiso
A study was conducted to evaluate the mechanisms underlying ectopic orofacial pain associated with tooth pulp inflammation in rats. We observed a significant decrease in the head withdrawal threshold (HWT) response to mechanical and heat stimuli applied to the ipsilateral facial skin upon application of complete Freund's adjuvant (CFA) to the upper first molar (M1TP) in comparison to application of vehicle. A large number of trigeminal ganglion (TG) neurons showed transient receptor potential vanilloid 1 (TRPV1) immunoreactivity (IR), and some of them were retrogradely labeled with fluorogold injected into the facial skin...
March 24, 2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29474943/attenuated-activation-of-homeostatic-glucocorticoid-in-keratinocytes-induces-alloknesis-via-aberrant-artemin-production
#9
Akira Matsumoto, Hiroyuki Murota, Mika Terao, Ichiro Katayama
Intense chronic itch significantly reduces quality of life for atopic dermatitis patients, impairing daily activity. Although abnormal itch sensation can be induced by innocuous stimuli, known as alloknesis, the mechanisms driving this process remain obscure. Psychological and environmental stimuli are known to aggravate atopic dermatitis symptoms. Recently, the enzyme 11β-hydroxysteroid dehydrogenase-1 (HSD11β1), which is expressed in keratinocytes, has been implicated in maintaining homeostasis against environmental stimuli by activating endogenous glucocorticoids...
February 21, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29411423/the-anatomy-of-the-perineal-branch-of-the-sciatic-nerve
#10
Christopher M Gibbs, Alexander D Ginsburg, Thomas J Wilson, Nirusha Lachman, Mario Hevesi, Robert J Spinner, Aaron J Krych
A "perineal" branch of the sciatic nerve has been visualized during surgery, but there is currently no description of this nerve branch in the literature. Our study investigates the presence and frequency of occurrence of perineal innervation by the sciatic nerve and characterizes its anatomy in the posterior thigh. Fifteen cadavers were obtained for dissection. Descriptive results were recorded and analyzed statistically. Twenty-one sciatic nerves were adequately anatomically preserved. Six sciatic nerves contained a perineal branch...
April 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29381568/the-lateral-femoral-cutaneous-nerve-description-of-the-sensory-territory-and-a-novel-ultrasound-guided-nerve-block-technique
#11
Thomas D Nielsen, Bernhard Moriggl, Jeppe Barckman, Jens A Kølsen-Petersen, Kjeld Søballe, Jens Børglum, Thomas F Bendtsen
BACKGROUND AND OBJECTIVES: Nerve blockade of the lateral femoral cutaneous (LFC) nerve provides some analgesia after hip surgery. However, knowledge is lacking about the extent of the cutaneous area anesthetized by established LFC nerve block techniques, as well as the success rate of anesthetic coverage of various surgical incisions. Nerve block techniques that rely on ultrasonographic identification of the LFC nerve distal to the inguinal ligament can be technically challenging. Furthermore, the branching of the LFC nerve is variable, and it is unknown if proximal LFC nerve branches are anesthetized using the current techniques...
May 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29357472/age-related-erosion-of-obstacle-avoidance-reflexes-evoked-with-electrical-stimulation-of-tibial-nerve-during-walking
#12
Sandra R Hundza, Amit Gaur, Ryan Brodie, Drew Commandeur, Marc D Klimstra
In young healthy adults, characteristic obstacle avoidance reflexes have been demonstrated in response to electrical stimulation of cutaneous afferents of the foot during walking. It is unknown whether there is an age-related erosion of this obstacle avoidance reflex evoked with stimulation to the tibial nerve innervating the sole of the foot. The purpose of this study was to identify age-dependent differences in obstacle avoidance reflexes evoked with electrical stimulation of the tibial nerve at the ankle during walking in healthy young and older (70 yr and older) adults with no history of falls...
April 1, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29339718/injury-activated-glial-cells-promote-wound-healing-of-the-adult-skin-in-mice
#13
Vadims Parfejevs, Julien Debbache, Olga Shakhova, Simon M Schaefer, Mareen Glausch, Michael Wegner, Ueli Suter, Una Riekstina, Sabine Werner, Lukas Sommer
Cutaneous wound healing is a complex process that aims to re-establish the original structure of the skin and its functions. Among other disorders, peripheral neuropathies are known to severely impair wound healing capabilities of the skin, revealing the importance of skin innervation for proper repair. Here, we report that peripheral glia are crucially involved in this process. Using a mouse model of wound healing, combined with in vivo fate mapping, we show that injury activates peripheral glia by promoting de-differentiation, cell-cycle re-entry and dissemination of the cells into the wound bed...
January 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29206768/inhibition-of-group-ia-afferents-between-brachioradialis-and-flexor-carpi-radialis-in-humans-a-study-using-an-electromyogram-averaging-method
#14
Mitsuhiro Nito, Wataru Hashizume, Katsuhiko Suzuki, Toshiaki Sato, Hiromi Fujii, Takuji Miyasaka, Masaomi Shindo, Akira Naito
PURPOSE: Our previous studies using a poststimulus time histogram method demonstrated inhibitory spinal reflex arcs (inhibition) between the brachioradialis (BR) and flexor carpi radialis (FCR) in humans. Group I afferents mediated the inhibition through an oligosynaptic path. In this study, effects of the inhibition on excitability of the motoneuron pools were examined, and we tried to clarify which afferents of group Ia or Ib are responsible for the inhibition. METHODS: We evaluated the effects of low-threshold afferents between BR and FCR on FCR and BR motoneuron pools, respectively, using an electromyogram-averaging method in 14 healthy human subjects...
March 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29180190/patterns-of-sural-nerve-innervation-of-the-sural-artery-with-implication-for-reconstructive-surgery
#15
Fang Fang, Wenxuan Zou, Zhiming Zhang, Qi Zhang, Yun Xie
BACKGROUND: Most of the literature concerning the neurocutaneous flap is related to its anatomic investigation and clinical application, and the more in-depth physiological problem such as whether the cutaneous nerve contains sympathetic fibers that innervate its accompanying vessels has never been explored. MATERIALS AND METHODS: Dissection was first performed on three rabbits. In another 22 rabbits, two rabbits undergoing no surgery were used as the normal control group...
December 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/29148009/preoperative-ultrasound-for-runoff-venous-decompression-of-peripheral-nerves-for-arteriovenous-access-related-pain-in-the-upper-limb
#16
Hiroaki Matsuda, Yoshinari Oka, Ryuichi Yoshida, Yuki Katsura, Hidemi Takeuchi, Yasuo Fujimoto, Shigeko Takatsu, Masashi Miyazaki
INTRODUCTION: Arteriovenous access (AVA)-related pain treated successfully with runoff-venous decompression of the causative nerve, following ultrasound (US)-assisted preoperative evaluation, has never been reported. CASE PRESENTATION: A 57-year-old man suffering from constant exhausting pains along the outflow cephalic vein of the radiocephalic arteriovenous fistula at the wrist and the antecubital fossa, was treated surgically after the diagnosis of AVA-related pain derived from cephalic vein compression on two peripheral cutaneous nerves, the superficial radial nerve (SRN) and the lateral antebrachial cutaneous nerve (LACN)...
November 9, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/29135783/beyond-the-bottom-of-the-foot-topographic-organization-of-the-foot-dorsum-in-walking
#17
Taryn Klarner, Gregory E P Pearcey, Yao Sun, Trevor S Barss, Chelsea Kaupp, Bridget Munro, Nick Frank, E Paul Zehr
INTRODUCTION: Sensory feedback from the foot dorsum during walking has only been studied globally by whole nerve stimulation. Stimulating the main nerve innervating the dorsal surface produces a functional stumble corrective response that is phase-dependently modulated. We speculated that effects evoked by activation of discrete skin regions on the foot dorsum would be topographically organized, as with the foot sole. METHODS: Nonnoxious electrical stimulation was delivered to five discrete locations on the dorsal surface of the foot during treadmill walking...
December 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29123119/acupuncture-points-can-be-identified-as-cutaneous-neurogenic-inflammatory-spots
#18
Do-Hee Kim, Yeonhee Ryu, Dae Hyun Hahm, Boo Yong Sohn, Insop Shim, O Sang Kwon, Suchan Chang, Young Seob Gwak, Min Sun Kim, Jae Hyo Kim, Bong Hyo Lee, Eun Young Jang, Rongjie Zhao, Jin Mo Chung, Chae Ha Yang, Hee Young Kim
Acupuncture, a traditional medical procedure practised for over 2000 years in Asia, stimulates specific but poorly defined sites called acupoints. To date, no unique anatomical acupoint structures have been found. However, noxious sensory signals from visceral organs produce hypersensitive spots on the skin (neurogenic spots), caused by cutaneous neurogenic inflammation, in the dermatome that overlaps with visceral afferent innervations. Here, we show that an acupoint is one form of neurogenic inflammation on the skin...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28981186/the-use-of-singapore-flaps-for-vaginal-reconstruction-in-women-with-vaginal-stenosis-with-obstetric-fistula-a-surgical-technique
#19
R J Pope, R H Brown, E Chipungu, L H Hollier, J P Wilkinson
Gynecologic and plastic surgeons collaborate to improve vaginal reconstruction for women with vaginal stenosis and obstetric fistula. As these cases occur typically in low-resource settings, the Singapore flap is a useful technique given its reliability, safety, ease of dissection, and minimal need for additional supplies. The fasciocutaneous flap maintains cutaneous innervation and vasculature and does not require stenting. The surgical collaboration has made it possible to provide functional vaginal reconstruction as a part of the overall care of obstetric fistula patients...
October 5, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28868961/serotonin-gated-inward-currents-are-three-times-more-frequent-in-rat-hairy-skin-sensory-afferents-than-in-those-innervating-the-skeletal-muscle
#20
Leonardo Fierro
Tight whole-cell patch clamp was performed in 191 DiI (1,1'-dioctadecyl-3,3,3'3'-tetramethylindocarbocyanine perchlorate) retrogradely labeled rat sensory afferents from skin shoulders ( n = 93) and biceps femoris muscles ( n = 98). 5-HT-gated inward currents were evoked with 50-µM serotonin (5-HT; 5-hydroxytryptamine), and their frequency and current densities were compared between skin and skeletal muscle sensory afferents. To evaluate if 5-HT-gated inward currents coexist with other ligand-gated currents, the skin and skeletal muscle sensory afferents were also sequentially exposed to external solution at pH 6...
January 2017: Molecular Pain
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